Melatonin vs MK-677 (Ibutamoren)
Both are used for sleep better. Here's how they compare on human evidence, mechanism, safety and availability — in plain English.
| Melatonin | MK-677 (Ibutamoren) | |
|---|---|---|
| Human evidence | ★★★★★ | ★★★☆☆ |
| Legal status | OTC Supplement, Prescription | Not Approved |
| How it works | Pineal hormone binding MT1/MT2 receptors (MTNR1A/MTNR1B) in the suprachiasmatic nucleus — shifts the circadian clock rather than sedating. Most people massively overdose it. | Orally-active non-peptide GHSR agonist; sustained GH/IGF-1 elevation and marked slow-wave-sleep enhancement (GH pulses in deep sleep). Reversed nitrogen wasting in trials. |
| In plain English | The "it's night" hormone. It re-times your body clock, so it's best for jet lag and late sleep phase, not as a sledgehammer sedative. 0.5 mg works as well as 10 mg with less morning fog. | A pill (not an injection) that keeps growth hormone elevated via the ghrelin switch — famous for deep sleep and appetite, plus fuller muscles. Downsides are water retention and higher blood sugar. |
| Bottom line | Overused at 10–20× the effective dose. Start at 0.5 mg. | The most practical GH-optimiser without a needle. |
| Availability | Prescription only | Not widely approved |
Which is better for sleep better?
Melatonin has the stronger human-evidence rating (★★★★★ vs ★★★☆☆), but the right choice still depends on your goal, tolerance and budget.
Full breakdowns: Melatonin · MK-677 (Ibutamoren).
Common questions
Is Melatonin or MK-677 (Ibutamoren) better for sleep better?
Melatonin has the stronger human-evidence rating (★★★★★ vs ★★★☆☆), but the right choice still depends on your goal, tolerance and budget.
What's the difference between Melatonin and MK-677 (Ibutamoren)?
Melatonin: Overused at 10–20× the effective dose. Start at 0.5 mg. — MK-677 (Ibutamoren): The most practical GH-optimiser without a needle.