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Carnitine

  • Nutrient
  • Varies by country
  • Identity checked
  • Sources last checked 2026-09-04

This page shows what was measured, who it was measured in, and what that does not settle.

What Carnitine does in the body

RNAWiki has not recorded what this substance changes in the body.

What happened in people

RNAWiki has not yet published a reviewed conclusion for this use.

A fixed RNAWiki sentence

Where this came from

Wording RNAWiki always uses, not a finding about this substance.

No reviewed claim names a result for any goal on this record.

No source is stored against this line.

The limit that matters most

Not recorded.

Where it acts
Not recorded.
Kind of result
No result is published, so no kind of result applies yet
Supervision
Not usually supervised: sold as a supplement or food ingredient where recorded. That is a legal category, not a safety judgement.

What the registries record it as

  • The supplement label database classes it as non-nutrient/non-botanical, under the name Carnitine.

    NIH Dietary Supplement Label Database · 7066 · read 2026-08-29

  • Its recorded molecular formula is C7H15NO3, weighing 161.2.

    PubChem record · 288 · read 2026-08-29

Where each sentence above came from

No plain explanation of what this changes is stored.

No recorded use is stored in reader language.

No statement of the main limit is recorded.

The four opening statements run to 26 words.

Words this page uses

Four words worth knowing first

Chosen from what this page shows, with each one explained before the word it depends on.

Stand-in result

A stand-in result is a number measured because the real result takes too long.

A picture of it, and where the picture fails

It is like judging a journey by the speedometer rather than by arriving.

Where that stops being true. Speed does predict arrival. Many stand-in results do not predict the real one.

What people get wrong. A stand-in result is often reported as the result itself.

A surrogate endpoint substituted for a clinical endpoint, valid only where the substitution has been shown to hold.

Formulation

A formulation is the exact made-up form a substance comes in.

A picture of it, and where the picture fails

It is like the difference between a whole bean and instant coffee.

Where that stops being true. Coffee tastes different. A formulation can change how much reaches the blood.

What people get wrong. Two products with the same name are assumed to behave the same. They often do not.

The specific composition and physical form of a product, including salt, excipients and release profile.

Receptor

A receptor is a part of a cell that a signal fits into.

A picture of it, and where the picture fails

A receptor is like a lock waiting for one key.

Where that stops being true. A lock either opens or does not. A receptor can be half-triggered, or worn out.

What people get wrong. Fitting a receptor is read as causing a benefit. It causes a step, and nothing more.

A protein that binds a specific ligand and converts that binding into a cellular response.

Pathway

A pathway is a chain of steps inside a cell, each one setting off the next.

A picture of it, and where the picture fails

A pathway is like a row of dominoes.

Where that stops being true. Dominoes fall one way. Pathways loop back and can switch themselves off.

What people get wrong. Changing one step is read as changing the outcome. Other steps often absorb it.

An ordered series of molecular interactions producing a defined cellular change.

What happened in peopleRead from sources, not yet reviewed

What happened in people

Each card is one study: the exact question it asked, who was in it, and whether it showed what it set out to show.

Primary outcome measures include - Coronary artery calcium (CAC) score at Year 4 - CAD risk factors, Framingham Risk Score (FRS), and health behaviors at Year 4 - Adverse cardiac outcomes during follow-up

The study did not show it

Who was studied
NCT00927693
How many people
2137
Study design
Not applicable
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated

What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.

The limits of this study, and where it came from

Main limit. No limitation is recorded for this study.

How far it carries. This study is recorded from the curated record, not from the registry match.

Form and route. Oral

Interval reported. Not recorded in this summary

Written into the record, not signed off as a reviewed claim.

  • openFDA NDC Directory · a recorded source, not a stored snapshot
  • openFDA SPL label · a recorded source, not a stored snapshot
  • NIH Dietary Supplement Label Database · a recorded source, not a stored snapshot
  • PubChem PUG-REST · a recorded source, not a stored snapshot

Change from baseline in Left ventricular ejection fraction

The study did not show it

Who was studied
NCT05673239
How many people
1008
Study design
Phase 4
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated

What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.

The limits of this study, and where it came from

Main limit. No limitation is recorded for this study.

How far it carries. This study is recorded from the curated record, not from the registry match.

Form and route. Oral

Interval reported. Not recorded in this summary

Written into the record, not signed off as a reviewed claim.

  • openFDA NDC Directory · a recorded source, not a stored snapshot
  • openFDA SPL label · a recorded source, not a stored snapshot
  • NIH Dietary Supplement Label Database · a recorded source, not a stored snapshot
  • PubChem PUG-REST · a recorded source, not a stored snapshot

Change in Alzheimer's Disease Assessment Scale-cognitive subscale (ADAS-Cog) score from baseline to end-of-treatment

The study did not show it

Who was studied
NCT07062198
How many people
845
Study design
Phase 3
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated

What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.

The limits of this study, and where it came from

Main limit. No limitation is recorded for this study.

How far it carries. This study is recorded from the curated record, not from the registry match.

Form and route. Oral

Interval reported. Not recorded in this summary

Written into the record, not signed off as a reviewed claim.

  • openFDA NDC Directory · a recorded source, not a stored snapshot
  • openFDA SPL label · a recorded source, not a stored snapshot
  • NIH Dietary Supplement Label Database · a recorded source, not a stored snapshot
  • PubChem PUG-REST · a recorded source, not a stored snapshot

Interference score using K-CWST(Korean-Color Word Stroop Test)

The study did not show it

Who was studied
NCT04346862
How many people
636
Study design
Phase 4
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated

What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.

The limits of this study, and where it came from

Main limit. No limitation is recorded for this study.

How far it carries. This study is recorded from the curated record, not from the registry match.

Form and route. Oral

Interval reported. Not recorded in this summary

Written into the record, not signed off as a reviewed claim.

  • openFDA NDC Directory · a recorded source, not a stored snapshot
  • openFDA SPL label · a recorded source, not a stored snapshot
  • NIH Dietary Supplement Label Database · a recorded source, not a stored snapshot
  • PubChem PUG-REST · a recorded source, not a stored snapshot

Morbidity

The study did not show it

Who was studied
NCT00001082
How many people
505
Study design
Phase 3
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated

What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.

The limits of this study, and where it came from

Main limit. No limitation is recorded for this study.

How far it carries. This study is recorded from the curated record, not from the registry match.

Form and route. Oral

Interval reported. Not recorded in this summary

Written into the record, not signed off as a reviewed claim.

  • openFDA NDC Directory · a recorded source, not a stored snapshot
  • openFDA SPL label · a recorded source, not a stored snapshot
  • NIH Dietary Supplement Label Database · a recorded source, not a stored snapshot
  • PubChem PUG-REST · a recorded source, not a stored snapshot

A Study on Amprenavir in Combination With Other Anti-HIV Drugs in HIV-Positive Patients

The study did not show it

Who was studied
NCT00000912
How many people
475
Study design
Phase 2
Compared against
Not recorded for this study
Kind of result
A number that stands in for health
What was found
Result not recorded on this page
Repeated elsewhere
Unreplicated

What this does not prove. A study that did not show an effect does not show that no effect exists anywhere.

The limits of this study, and where it came from

Main limit. No limitation is recorded for this study.

How far it carries. This study is recorded from the curated record, not from the registry match.

Form and route. Oral

Interval reported. Not recorded in this summary

Written into the record, not signed off as a reviewed claim.

  • openFDA NDC Directory · a recorded source, not a stored snapshot
  • openFDA SPL label · a recorded source, not a stored snapshot
  • NIH Dietary Supplement Label Database · a recorded source, not a stored snapshot
  • PubChem PUG-REST · a recorded source, not a stored snapshot
What we know
RNAWiki holds 6 written-up human studies for this substance, each with the question it asked.
How we know it
Each card names the study, the number of people and what the study set out to measure.
What this does not prove
These summaries were written by a person and have not been signed off as reviewed claims.
Why it matters
A study that failed is as informative as one that worked, and both are here.
What we still do not know
No reviewed claim exists, so no exact population, effect size or interval is published yet.

What happened in peopleRead from sources, not yet reviewed

How close this is to real life

The top step is something a person would feel or care about. The bottom is a guess from software. Filled steps are where evidence exists for this substance.

  1. Living longer, or avoiding a major event No evidence recorded. Death, a heart attack, a stroke, a hospital stay.No registered study measures this.
  2. What a body can do day to day No evidence recorded. Walking, dressing, breathing, recovering.No registered study measures this.
  3. Measured performance No evidence recorded. How much was lifted, how far was run, how fast.No registered study measures this.
  4. Symptoms and quality of life No evidence recorded. Pain, tiredness, mood, sleep, as the person rated it.No registered study measures this.
  5. A number that stands in for health Evidence recorded. Cholesterol, blood sugar, bone density. A stand-in, not the thing itself.2 registered measures of this kind.
  6. A step measured inside a person Evidence recorded. Something measured in human tissue or human cells.A human record sits on the stored organism ladder.
  7. Animals Evidence recorded. Mice, rats, dogs. Useful for ideas, not proof about people.Stored records in C. elegans (roundworm), Drosophila (fruit fly), Mouse, Rat, Dog. A result in animals says what to test next. It does not say what happens in people.
  8. Cells in a dish Evidence recorded. Cells or chemistry on a bench, far from a whole body.Stored mechanism abstracts describe steps measured in cells or tissue.
  9. A guess from software No evidence recorded. Nobody measured it. RNAWiki never publishes one as a finding.RNAWiki stores no prediction for this record. Software can suggest a link. RNAWiki does not publish one as a finding.

Higher on these steps means closer to something a person would feel. It does not mean better done.

What it would be like to takeRead from sources, not yet reviewed

Felt, measured, or meaningful

Three different things that get called the same word. Registered studies measured all three, and mixing them is how a blood test becomes a health claim.

Felt

Things a person could notice without a test.

No registered study measured anything of this kind.

Measured

Things only a test, a scale or a device shows.

  • blood inflammatory marker
  • concentration of total plasma ketones

Meaningful

Things that change how a life goes, not only a number.

No registered study measured anything of this kind.

A registered study says what someone planned to measure. It does not say what they found. A number moving is not the same as a life going better. The two are shown apart here.

Felt, but not shown to help. A person notices a change. No study showed it leads anywhere good.

Measured, but not felt. A number moves. The person notices nothing. Both can be true.

Measured, but not shown to matter. A number moves in the good direction. Nobody showed that lives went better.

Matters, but takes years. The result that counts may take longer than anyone would keep watching.

Names that fit none of the three (9)
  • behavioral test scores
  • peak walking time at day 180
  • iohexol clearance
  • primary outcome measure
  • childhood autism rating scale
  • reynolds intellectual assessment scales
  • vineland adaptive behavior scale
  • das28 esr for both arms
  • weekly esa dose at month 6

These are harms, study-process measures, or names the rules did not recognise. They are shown rather than dropped.

What is missing or unclearRead from sources, not yet reviewed

Were people like you studied?

RNAWiki cannot tell whether a study fits you. It can show who was in it, and where the result stops carrying.

Who was studied

People similar to this profile were included.

  • May temporarily relieve symptoms associated with exertions, such as muscle pain, muscle weakness, trembling of limbs, and cramps. Label footnote: Claims based on traditional homeopathic practice, not accepted medical evidence. Not FDA evaluated.

Who is missing from the studies

  • Which groups were under-represented in the studies has not been recorded for this substance. Pregnancy, breastfeeding, children, older adults, and people with liver or kidney conditions are commonly excluded from trials; nothing here says whether they were.

Where the result stopped carrying

  • This is a scope explorer, not a diagnosis engine.
  • It shows who was studied so you can see whether people similar to you were included.

RNAWiki cannot tell whether a study fits you. It can show who was in it.

What it would be like to takeRead from sources, not yet reviewed

Why it might seem to do nothing

A real effect and a noticed effect are different things. These are the recorded reasons the two come apart.

It was studied for a different goal

The studies measured something else entirely.

On this record: Some registered studies measured things that match no goal on this page.

It was studied in different people

The people in the studies were not much like the reader.

On this record: Which groups were under-represented in the studies has not been recorded for this substance. Pregnancy, breastfeeding, children, older adults, and people with liver or kidney conditions are commonly excluded from trials; nothing here says whether they were.

A different form was studied

The studied form is not the form on the shelf.

On this record: This record is linked to 1 related forms. Evidence does not carry across all of them.

The evidence may simply be wrong

Small early studies often do not hold up.

On this record: RNAWiki has not yet published a reviewed conclusion for this use.

Other reasons RNAWiki checked and found nothing for (9)
There was nothing to correct
Where a level is already normal, topping it up may change nothing. Nothing in this record points to this reason.
Something else had to happen too
In the studies it was paired with training, a diet or another treatment. Nothing in this record points to this reason.
The change is too small to feel
A real change can still sit below what a person notices. Nothing in this record points to this reason.
Day-to-day swing hides it
Sleep, food, stress and time of day move most numbers more than this would. Nothing in this record points to this reason.
Not enough time yet
The studies ran longer than the person has waited. Nothing in this record points to this reason.
It was not taken as studied
Missed days change the result, and studies count them. Nothing in this record points to this reason.
Something else changed at the same time
Two changes at once cannot be told apart afterwards. Nothing in this record points to this reason.
The product may not be what it says
Contents of a sold product are not always what the label states. Nothing in this record points to this reason.
No recorded reason
RNAWiki has nothing stored that would explain it. Nothing in this record points to this reason.

None of these is a reason to take more. Taking more is not a step this page ever suggests.

What it would be like to takeRead from sources, not yet reviewed

What taking it involves

The recorded facts about getting hold of it and using it. Nothing here is a suggestion about what you should do.

How it is supplied

Varies by country

Quoted from a source

Where this came from

Copied from a source RNAWiki stored, with the source named.

Read from the recorded approval status.

No source is stored against this line.

Form and route

Oral

Source-linked record

Where this came from

A person wrote this into the record with the study named beside it. No reviewer has signed it off.

The form and route recorded on this substance.

No source is stored against this line.

Who oversees it

Not usually supervised: sold as a supplement or food ingredient where recorded. That is a legal category, not a safety judgement.

Quoted from a source

Where this came from

Copied from a source RNAWiki stored, with the source named.

The identity record classes it as a supplement ingredient; no medicines register records an approval.

No source is stored against this line.

What is in the pack

Sold as liquid, given by the oral route.

Source-linked record

Where this came from

A person wrote this into the record with the study named beside it. No reviewer has signed it off.

Recorded notes on how this is sold and what that means for what is in the pack.

No source is stored against this line.

Where it is registered

Regulatory records are listed in the technical disclosure at the foot of this page.

Counted from records

Where this came from

A count of rows RNAWiki holds. It describes our records, not your body.

Register entries are stored per jurisdiction and shown with their dates.

No source is stored against this line.

Why people stop

Not recorded.

Nothing recorded

Where this came from

RNAWiki holds nothing here and says so rather than guessing.

No record of why people stopped taking it is stored for this substance.

No source is stored against this line.

What it would be like to takeNothing found in the sources checked

What can go wrong

Sorted by where each line came from. A regulator's label and a report somebody sent in are not the same kind of fact.

Nothing found in the sources checked

No harm is recorded against this substance in the sources RNAWiki checked. Finding nothing is not the same as showing there is nothing.

The sources listed were searched and held nothing. That is not the same as nothing existing.

Over a long time. No completed tested study window is recorded, so long-term effects are not established by the registry record.

Groups the studies covered thinly. Which groups were under-represented in the studies has not been recorded for this substance. Pregnancy, breastfeeding, children, older adults, and people with liver or kidney conditions are commonly excluded from trials; nothing here says whether they were.

What is missing or unclearRead from sources, not yet reviewed

Does the exact form matter?

Evidence belongs to the exact thing that was tested. A different salt, a different mixture or a different preparation is a different question.

The form that was studied

Oral

Source-linked record

Where this came from

A person wrote this into the record with the study named beside it. No reviewer has signed it off.

The form used in the studies cited on this page.

No source is stored against this line.

What is sold

Not recorded.

Nothing recorded

Where this came from

RNAWiki holds nothing here and says so rather than guessing.

Nothing further is recorded about which forms are sold.

No source is stored against this line.

What is recorded as being sold

  • 2 products list this as an active ingredient in the United States drug directory. None of them contains it on its own, so nothing on this page can separate it from what it is combined with.

    FDA National Drug Code directory · 44911-0542 · read 2026-08-29

  • They are sold as liquid, taken oral.

    FDA National Drug Code directory · 44911-0542 · read 2026-08-29

  • 2 published labels name it as an active ingredient. None of them describes this substance alone, so no label text on this page can be attributed to it rather than to a combination.

    US prescribing information · 38fd4f98-a42a-435b-9643-16df66453951 · read 2026-08-29

  • Those labels are classed as human otc drug.

    US prescribing information · 38fd4f98-a42a-435b-9643-16df66453951 · read 2026-08-29

  • 2443 marketed supplement labels list this ingredient, classed as amino acid/protein, fiber and other nutrients, non-nutrient/non-botanical and other combinations.

    NIH Dietary Supplement Label Database · 217270 · read 2026-08-29

  • Those labels carry all other, nutrient and structure/function claims. A claim of that kind is written by the manufacturer and is not assessed by any regulator, so its presence says nothing about whether it is true.

    NIH Dietary Supplement Label Database · 217270 · read 2026-08-29

Evidence carries across two names for one substance. It does not carry across a salt, a mirror form or a mixture.

Names and forms linked to this record

  • Stereoisomer of

    Levocarnitine

    Evidence on this page does not automatically apply to this one.

What it would be like to takeRead from sources, not yet reviewed

What you could measure

Watching one thing carefully can tell you whether it moved. It cannot tell you what moved it.

This is sold without a prescription, so a person can sensibly watch one thing and see whether it moves.

  1. Pick one goal. One goal only. Two at once cannot be told apart afterwards.

  2. Pick one thing to watch. Registered studies measured things like: blood inflammatory marker; concentration of total plasma ketones.

  3. Measure before you start. Take the same measurement several times first. One reading is not a starting point.

  4. Know the swing. Write down how much it moves on its own across a normal week.

  5. Change one thing. Change nothing else at the same time, including training and sleep.

  6. Give it the study length. No finished study window is recorded, so no length is suggested here.

  7. Track whether you took it. Missed days are the most common reason a home test shows nothing.

  8. Read the trend. Look at the line across weeks. A single reading tells you almost nothing.

What not to measure

  • Anything that swings more day to day than the change you are looking for.
  • A wearable estimate of sleep stages, which is an estimate and not a measurement.
  • Weight on one morning, which mostly records water.
  • A feeling you did not write down before starting.

When to stop

  • Stop if something new and unpleasant starts, and ask a pharmacist or doctor.
  • Stop if you cannot keep everything else steady, because the result will not mean anything.
  • Stop at the end of the window you set, and read the trend then.

Tracking can show whether something changed for you. It cannot show what caused it.

RNAWiki does not work out an amount for anyone.

What is missing or unclearRead from sources, not yet reviewed

What nobody knows yet

Open questions, each with why it is open and what would close it.

How much did people take in the studies?

The sources RNAWiki checked hold nothing for this field.

Why it matters. A result belongs to an amount. Without the amount the result floats free.

What would answer it

A stored source that records it, and a reviewer to sign it off.

Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.

How fast does the body clear it?

The sources RNAWiki checked hold nothing for this field.

Why it matters. Without this, nothing on this page can say how long anything lasts.

What would answer it

A stored source that records it, and a reviewer to sign it off.

Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.

Missing populations

Which groups were under-represented in the studies has not been recorded.

Why it matters. Recorded by the evidence model as a gap on this record.

What would answer it

A study that measures it, and a reviewer to sign it off.

Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.

Missing long-term data

No completed tested study window is recorded.

Why it matters. Recorded by the evidence model as a gap on this record.

What would answer it

A study that measures it, and a reviewer to sign it off.

Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.

No reviewed conclusion

RNAWiki has not yet published a reviewed conclusion for this use.

Why it matters. Recorded by the evidence model as a gap on this record.

What would answer it

A study that measures it, and a reviewer to sign it off.

Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.

Missing interaction studies

No interaction was found in the registers checked. Not finding one is not the same as showing there is none.

Why it matters. Recorded by the evidence model as a gap on this record.

What would answer it

A study that measures it, and a reviewer to sign it off.

Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.

Formulation uncertainty

Several salts, forms or products of Carnitine are recorded. Results from one form may not transfer to another.

Why it matters. Recorded by the evidence model as a gap on this record.

What would answer it

A study that measures it, and a reviewer to sign it off.

Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.

Mechanism not reviewed

No reviewed mechanism story exists for this substance.

Why it matters. Recorded by the evidence model as a gap on this record.

What would answer it

A study that measures it, and a reviewer to sign it off.

Last checked 2026-09-04. Searched: The sources listed in the receipts at the foot of this page.

What happened in peopleNothing found in the sources checked

Check any of this yourself

Every line above traced back to the study it came from. This is the technical layer, and the vocabulary changes here.

Nothing found in the sources checked

No traced study record is stored for this substance.

The sources listed were searched and held nothing. That is not the same as nothing existing.

Checks this page had to pass

  • Passed

    Identity resolved

    no open identity hold

  • Passed

    No unresolved merge across substance families

    no quarantine open

  • Not passed

    Every public sentence names a source

    The opening statement carries no source: the record holds neither an explanation nor a recorded use.

  • Not passed

    Trial roles classified for highlighted evidence

    No registered study is classified as testing this substance.

  • Passed

    No internal keys in reader text

    enforced by the copy-contract test over the rendered page

  • Passed

    Safety mode resolved

    The identity record classes it as a supplement ingredient; no medicines register records an approval.

  • Passed

    Canonical metadata present

    slug and display name present

What is missing or unclearRead from sources, not yet reviewed

How this medicine reached us

Kept near the foot of the page. A historical event moves up only when it changes something about this substance today.

What the approval register records

  • The earliest marketing start date recorded for a listed product is 19840815.

    FDA National Drug Code directory · 44911-0542 · read 2026-08-29

What is missing or unclearRead from sources, not yet reviewed

What to learn next

Ordered by what would most change how you read this page, starting with what is easiest to misunderstand.

This order is fixed in code and does not count clicks or time on the page.

What is not here

7 questions this page could not answer

These sections were prepared and left out because there was nothing to put in them. They are listed rather than hidden, so the gaps in this record are visible.

  • What was measured, goal by goal — found nothing in the sources checked.
  • The path through the body — found nothing in the sources checked.
  • How long anything takes — found nothing in the sources checked.
  • What it may clash with — found nothing in the sources checked.
  • Other ways to the same goal — found nothing in the sources checked.
  • Claims that go past the evidence — found nothing in the sources checked.
  • What changed on this page — found nothing in the sources checked.

The record as stored

The full record, for auditing

Everything above is built from what is below. This layer keeps the technical vocabulary, record identifiers and every stored row, so a reader who wants to check the page can.

Recorded evidence blocks (10)

What did Carnitine's largest trial (200 people) and its longest (19 years) measure?


200 people in Carnitine's largest registered study, 19 years in its longest registered window, measuring Serum Carnitine Concentration. ClinicalTrials.gov · 2026-09-01

3 na, 3 phase4, 2 phase2, 1 early phase1, 1 na or unstated, 1 phase1, 1 phase3; NCT01731236; 2029-12. Last human test completed 2023, NCT04908397.

Interpretation These counts include studies where Carnitine was a comparison treatment, a background treatment or an exposure in an observational study, and the longest window may be a planned end date. Trial roles have not yet been classified for this record.

Show the evidence
  • na
    3
  • phase4
    3
  • phase2
    2
  • early phase1
    1
  • na or unstated
    1
  • phase1
    1
2 more recorded rows
  • phase3
    1
  • Last recorded human test NCT04908397
    2023-06-30

recorded 2026-09-01 · last checked 2026-09-04

From C. elegans to human: where has Carnitine shown lifespan?


C. elegans: lifespan, Drosophila: lifespan, mouse: mechanism-only, rat: mechanism-only, dog: biomarker and human: biomarker (12): the rungs where Carnitine has a recorded finding. Europe PMC and ClinicalTrials.gov · organism ladder · 2026-09-01

Interpretation Serum Carnitine Concentration — the recorded outcome words.

Yeast C. elegans lifespanDrosophila lifespanMouse mechanism-onlyRat mechanism-onlyDog biomarkerNon-human primate Human biomarker
Show the evidence
  • C. elegans
    lifespan
  • Drosophila
    lifespan
  • mouse
    mechanism-only
  • rat
    mechanism-only
  • dog
    biomarker
  • human NCT01904396
    biomarker; Serum Carnitine Concentration; 12

recorded 2026-09-01 · last checked 2026-09-04

More Carnitine was worse in human: at what point?


U-shaped in human: "On ICU-day-6, both low and high free carnitine concentrations associated with delayed ICU-recovery, and excess morbidity and mortality, suggesting a U-shaped relationship." Europe PMC · dose-response search · 2026-02-12

6 recorded sentences naming Carnitine; U-shaped, Dose-response, dose-response

Show the evidence

U-shaped

  • PMID 41572315
    "On ICU-day-6, both low and high free carnitine concentrations associated with delayed ICU-recovery, and excess morbidity and mortality, suggesting a U-shaped relationship."
  • PMID 39429785
    "A non-linear and U-shaped (for HFpEF) or J-shaped (for HFrEF) association between circulating free carnitine levels and the composite risk of cardiac events were observed."
  • Dose-response PMID 41769658
    "Dose-response analyses confirmed the efficacy of L-carnitine at relatively low dosages, while other supplements required higher intakes without achieving the predefined clinical targets."

dose-response

  • PMID 40860286
    "Additionally, for each per SD change, significant dose-response relationships were noted with increased odds of asthenozoospermia linked to elevated TMAO (OR = 1.31, 95% CI = 1.12-1.55), as well as L-carnitine (OR = 0.79, 95% CI = 0.67-0.93) and total methyl donors exposure (OR = 0.82, 95% CI = 0.70-0.96) levels."
  • PMID 39239644
    "The dose-response relationship between plasma PHB and carnitine and acylcarnitines (CARs) in plasma and brain were assessed by the variance analysis trend test and Spearman's rank correlation test."
  • PMID 39239644
    "Only when the dose-response relationship was fully considered, different strategies screen for the same biomarkers (plasma acetyl-carnitine (C2) and plasma decanoyl-carnitine (C10)), which indicated plasma acylcarnitines might serve as toxicity biomarkers."

recorded 2026-02-12 · last checked 2026-09-04

Could one person measure Carnitine's effect on behavioral test scores?


Behavioral test scores: measured in Carnitine's trials.

Interpretation behavioral test scores is the recorded endpoint.

Show the evidence

biomarkers

  • behavioral test scores; 2026-09-01
  • peak walking time at day 180; 2026-09-01
  • iohexol clearance; 2026-09-01
  • primary outcome measure; 2026-09-01
  • childhood autism rating scale; 2026-09-01
  • reynolds intellectual assessment scales; 2026-09-01
5 more recorded rows
  • biomarkers
    vineland adaptive behavior scale; 2026-09-01
  • biomarkers
    blood inflammatory marker; 2026-09-01
  • biomarkers
    concentration of total plasma ketones; 2026-09-01
  • biomarkers
    das28 esr for both arms; 2026-09-01
  • biomarkers
    weekly esa dose at month 6; 2026-09-01
  • human trials at or under30
    5
  • Not recorded for this substance
    a recorded half-life
  • smallest human trial
    0; NCT01392313; NA; the smallest recorded human enrolment at or below 30; the registry states no direction of its result; WITHDRAWN

Which of behavioral test scores, blood inflammatory marker and childhood autism rating scale did Carnitine's trials measure?


behavioral test scores, blood inflammatory marker and childhood autism rating scale lead 11 outcome terms across Carnitine's trials. ClinicalTrials.gov · 2026-09-01

Interpretation primary outcome measure, childhood autism rating scale, reynolds intellectual assessment scales, vineland adaptive behavior scale, blood inflammatory marker and concentration of total plasma ketones follow.

Show the evidence
  • behavioral test scores
    1
  • peak walking time at day 180
    1
  • iohexol clearance
    1
  • primary outcome measure
    1
  • childhood autism rating scale
    1
  • reynolds intellectual assessment scales
    1
5 more recorded rows
  • vineland adaptive behavior scale
    1
  • blood inflammatory marker
    1
  • concentration of total plasma ketones
    1
  • das28 esr for both arms
    1
  • weekly esa dose at month 6
    1

recorded 2026-09-01 · last checked 2026-09-04

Which of Carnitine's 3 ongoing trials reports first?


3 registered trials of Carnitine are open; earliest completion 2025-06. ClinicalTrials.gov · 2026-09-01

Primary Outcome Measure; change in DAS28 ESR for both arms; latest 2029-12

Show the evidence

Trial

  • NCT01731236
    "CARNIVAL Study: Gut Flora Dependent Metabolism of Dietary CARNItine and Phosphatidylcholine and cardioVAscuLar Disease"; n 100; "Primary Outcome Measure"; 2029-12
  • NCT06753565
    "L-carnitine Supplementation in Rheumatoid Arthritis Patients"; n 60; "change in DAS28 ESR for both arms"; 2025-06
  • NCT07160452
    "Levocarnitine for Reducing ESA Requirements in Hemodialysis Patients With Renal Anemia"; n 94; "Weekly ESA dose at Month 6 (units/week)"; 2026-03-15

recorded 2026-09-01 · last checked 2026-09-04

Which 3 trials of Carnitine posted no result?


Posted no result
3 of 3 completed trials
Registrations
NCT00351234, NCT02059577 and NCT00572741
Completion dates
oldest 2007-04; newest 2016-04
Show the evidence

Trial

  • NCT00351234
    2007-04
  • NCT02059577
    2013-04
  • NCT00572741
    2016-04

At the median, Carnitine's trials enrolled 49.5 people — anything larger?


Median enrolment
49.5
Largest enrolment
200
Registered trials counted
12

Was Carnitine studied with fasting and exercise?


fasting and exercise are named in Carnitine's label sentences: "The serum C2-acylcarnitine-to-free carnitine ratio was higher in the OA trial than in the PA trial in both postprandial (P = 0.004) and next-morning fasting states (P = 0.009)." openfda-label+europepmc · 2026-08-17

2 recorded statements; fasting, exercise

Show the evidence
  • fasting
    The serum C2-acylcarnitine-to-free carnitine ratio was higher in the OA trial than in the PA trial in both postprandial (P = 0.004) and next-morning fasting states (P = 0.009).
  • exercise
    In a randomized, double-blind, placebo-controlled crossover design, 20 trained male recreational CrossFit<sup>®</sup> athletes completed the "Cindy" workout within a 20 min period after ingesting either 3 g of L-carnitine tartrate or a placebo 90 min before exercise.

recorded 2026-08-17 · last checked 2026-09-04

What is recorded about Carnitine and autophagy?


"Irinotecan combined with FAO inhibition using KN510713 (a combination of KN510 targeting the carnitine-acylcarnitine transporter and KN713 targeting acetyl-CoA acyltransferase1/2) or FAO gene knockdown blocked autophagy flux and cell growth." — where Carnitine and autophagy appear together. Europe PMC · pathway abstract search · 2026-08-20

autophagy, AMPK, sirtuin, mTOR, IGF-1, NAD+; PMID 42008004, 42126802, 42143848, 42655800

Show the evidence
  • autophagy PMID 42008004
    "Irinotecan combined with FAO inhibition using KN510713 (a combination of KN510 targeting the carnitine-acylcarnitine transporter and KN713 targeting acetyl-CoA acyltransferase1/2) or FAO gene knockdown blocked autophagy flux and cell growth."
  • AMPK PMID 42126802
    "Biochemical assays and pathological staining were performed to assess lipid and glucose metabolism. qPCR and Western blot analysis were used to evaluate the mRNA and protein expressions related to fatty acids (FA) translation [including FA transport proteins (FATP) 2, FATP5, CD36], FA synthesis [including stearoyl-CoA desaturase 1 (SCD1), sterol regulatory element-binding proteins-1c (SREBP-1c),…"

sirtuin

  • PMID 42126802
    "Biochemical assays and pathological staining were performed to assess lipid and glucose metabolism. qPCR and Western blot analysis were used to evaluate the mRNA and protein expressions related to fatty acids (FA) translation [including FA transport proteins (FATP) 2, FATP5, CD36], FA synthesis [including stearoyl-CoA desaturase 1 (SCD1), sterol regulatory element-binding proteins-1c (SREBP-1c),…"
  • PMID 42143848
    "L-carnitine ameliorates impaired endometrial decidualization in rats fed a high-fat diet and HESC treated with palmitic acid via the SIRT1/FOXO1/progesterone receptor pathway."
  • AMPK PMID 42655800
    "Genes involved in lipid mobilization and oxidation, ketogenesis, inflammation, cellular stress, and autophagy; <i>sirtuin 1 (SIRT1)</i>, <i>peroxisome proliferator-activated receptor alpha (PPARA)</i>, <i>carnitine palmitoyltransferase 1a (CPT1A)</i>, <i>3-hydroxy-3-methylglutaryl-coenzyme a synthase 2 (HMGCS2)</i>, <i>cluster of differentiation 36 (CD36)</i>, <i>lipase E (LIPE)</i>, <i>protein…"
  • sirtuin PMID 42655800
    "Genes involved in lipid mobilization and oxidation, ketogenesis, inflammation, cellular stress, and autophagy; <i>sirtuin 1 (SIRT1)</i>, <i>peroxisome proliferator-activated receptor alpha (PPARA)</i>, <i>carnitine palmitoyltransferase 1a (CPT1A)</i>, <i>3-hydroxy-3-methylglutaryl-coenzyme a synthase 2 (HMGCS2)</i>, <i>cluster of differentiation 36 (CD36)</i>, <i>lipase E (LIPE)</i>, <i>protein…"
  • autophagy PMID 42655800
    "Genes involved in lipid mobilization and oxidation, ketogenesis, inflammation, cellular stress, and autophagy; <i>sirtuin 1 (SIRT1)</i>, <i>peroxisome proliferator-activated receptor alpha (PPARA)</i>, <i>carnitine palmitoyltransferase 1a (CPT1A)</i>, <i>3-hydroxy-3-methylglutaryl-coenzyme a synthase 2 (HMGCS2)</i>, <i>cluster of differentiation 36 (CD36)</i>, <i>lipase E (LIPE)</i>, <i>protein…"
  • mTOR PMID 41429425
    "These findings demonstrate that L-carnitine exerts a therapeutic effect against MSG-induced hepatocellular injury by modulating oxidative stress, inflammatory cytokines, and autophagy imbalance via the mTOR-ULK1-ATG13 pathway."
  • autophagy PMID 41429425
    "These findings demonstrate that L-carnitine exerts a therapeutic effect against MSG-induced hepatocellular injury by modulating oxidative stress, inflammatory cytokines, and autophagy imbalance via the mTOR-ULK1-ATG13 pathway."
  • AMPK PMID 39637931
    "Peroxisome proliferator activated receptor alpha (PPARα), sirtuin 1 (Sirt1)/adenosine 5'-monophosphate-activated protein kinase (AMPK) pathway- and fatty acid oxidation (acyl-CoA oxidase 1 and carnitine palmitoyltransferase 1A)-associated proteins were measured both in vivo and in vitro."
5 more recorded rows
  • IGF-1 PMID 40846253
    "However, even though HFD notably increased blood levels of IGF-1, knocking down the carnitine-acylcarnitine carrier (CAC) to inhibit FAO completely reversed the tumor-promoting effects in pancreatic cancer cells, accompanied by a significant decrease in ATP production."
  • mTOR PMID 39805783
    "Western blot was employed to determine the protein levels of BMAL1, CLOCK, period circadian clock 2(PER2), cryptochrome circadian regulator 1(CRY1), Rev-Erbα, carbohydrate response element-binding protein(ChREBP), peroxisome proliferator-activated receptors alpha and gamma(PPARα/γ), sterol regulatory element-binding protein 1C(SREBP-1C), mammalian target of rapamycin(mTOR), protein kinase B(Akt),…"
  • NAD+ PMID 39805783
    "Western blot was employed to determine the protein levels of BMAL1, CLOCK, period circadian clock 2(PER2), cryptochrome circadian regulator 1(CRY1), Rev-Erbα, carbohydrate response element-binding protein(ChREBP), peroxisome proliferator-activated receptors alpha and gamma(PPARα/γ), sterol regulatory element-binding protein 1C(SREBP-1C), mammalian target of rapamycin(mTOR), protein kinase B(Akt),…"
  • mTOR PMID 42650882
    "It does so through mechanisms such as fatty acid uptake, β-oxidation, de novo lipogenesis, and membrane remodeling, all orchestrated by CD36, carnitine palmitoyltransferase 1A, PPARγ, AMP-activated protein kinase, and the PI3K/AKT/mTOR pathway."
  • NAD+ PMID 41903436
    "This interaction promoted l-carnitine-dependent metabolic flux, which activated the NAD⁺-dependent deacetylase SIRT3."

recorded 2026-08-20 · last checked 2026-09-04

Where it is registered
Identifiers, relations and other names

The exact record

PubChem CID
2724480
CAS number
541-14-0
InChIKey
PHIQHXFUZVPYII-LURJTMIESA-N

Relations

Trade name
Recovatone, Cell Energy Performance Drops 2048, Recovatone / Cell Energy Performance Drops 2048
Also called
1-PROPANAMINIUM, 3-CARBOXY-2-HYDROXY-N,N,N-TRIMETHYL-, INNER SALT, (2S)-, AMMONIUM, (3-CARBOXY-2-HYDROXYPROPYL)TRIMETHYL-, HYDROXIDE, INNER SALT, D-, CARNITINE D-FORM [MI], D-(+)-CARNITINE
Sources (8)

Sources

2 more sources

ClinicalTrials.gov — US Government work · Europe PMC — metadata only, under the recorded legal gate · derived from this page's own recorded fields; no external licence · mixed register set; per-register licences in docs/specs/corpus-20k-sources.md · openFDA / DailyMed — US Government work

How these records are assembled · Which registers were checked

Index-quality checks
  • identity passed: no open identity hold
  • required summary fields resolved: 4 required field(s) not terminal: Why people use it, Best-supported result, Biggest unanswered question, Human evidence
  • public claims reviewed: 0 reviewed claim(s); drafts are never rendered
  • source coverage passed: 8 source rows
  • no critical contamination: no quarantine open
  • canonical metadata passed: slug and display name present
  • no raw internal fields: enforced by the copy-contract test over the rendered page

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