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Beta-Alanine

Evidence: ★★★★☆ · Status: OTC Supplement

💡 Did you know? The harmless skin-tingle from beta-alanine isn't the benefit — it's a nerve quirk. The real effect is buffering acid so your muscles last a few more reps.

In plain English

Hard effort floods muscle with acid ("the burn"). Beta-alanine builds up an acid-sponge (carnosine) so you can push through the burn longer — perfect for the 1–4 minute effort range.

How it works

Rate-limiting precursor to muscle carnosine (synthesised by carnosine synthase, CARNS1). Carnosine buffers intracellular H⁺ ions that accumulate in high-intensity work — delaying the acidosis that forces you to stop.

Molecular target & official sources

CARNS1 carnosine synthase (NCBI Gene) · Beta-alanine (PubChem CID 239)

Protocol

3.2–6.4 g/day (split doses to reduce tingling); saturates over 4–6 weeks.

Watch out

Harmless skin tingling (paraesthesia).

Bottom line

Excellent for Hyrox-style intervals. Stacks with creatine (different energy systems).

Helps with: Build Muscle & Strength · Endurance

The human evidence

Multiple meta-analyses (e.g. Hobson 2012, Saunders 2017) show a small but reliable improvement in high-intensity exercise capacity for efforts lasting ~1–4 minutes, via raised muscle carnosine buffering acid build-up. Well-replicated; benefit is specific to that time domain, not to strength or endurance.

Stacks with

Creatine (different energy system — complementary) and sodium bicarbonate (intracellular + extracellular buffering).

Avoid combining with

Nothing serious. The harmless skin-tingling (paraesthesia) fades if you split doses or use a sustained-release form.

Availability & where to buy

Available over the counter. Widely available OTC — e.g. iHerb (ships worldwide); in Singapore also Guardian, Watsons, GNC, Shopee / Lazada. Look for a third-party-tested / GMP mark and check the dose per serving. Cheap — ~S$20–30 for 2–3 months. Buy plain beta-alanine powder; the branded "CarnoSyn" is the same molecule.

Used in these protocols

Compare Beta-Alanine

Common questions

Does Beta-Alanine actually work?

Human-evidence rating: 4 of 5. Excellent for Hyrox-style intervals. Stacks with creatine (different energy systems).

How do you take Beta-Alanine?

3.2–6.4 g/day (split doses to reduce tingling); saturates over 4–6 weeks.

What are the risks or side effects of Beta-Alanine?

Harmless skin tingling (paraesthesia).

Is Beta-Alanine legal or approved?

Regulatory status: OTC Supplement.