Science Library

Beta-alanine

Moderate evidence

EnduranceStrength

Dose

4-6 g/day

Timing

Daily, any time

Loads in

2-4 weeks

Best for

1-4 min efforts

Does it work?

-A little — for the right job. Loading 4-6 g/day for several weeks raises muscle carnosine, which buffers acid build-up and modestly helps all-out efforts in the ~1-4 minute (up to ~10 min) range: repeat sprints, 400-1500 m, rowing, hard intervals, high-rep "burn" sets. The gain is small (about 2-3% for recreational athletes, less in elites) and it does nothing for single max lifts or efforts under a minute.

How much · when

-Take 4-6 g per day, every day — it works by slowly building muscle carnosine, not as a pre-workout. Timing within the day doesn't matter.
-Expect 2-4 weeks of consistent dosing before benefit; carnosine keeps climbing for ~12 weeks, so be patient.
-Split into 1.6 g doses (or use a sustained-release tablet) to avoid the tingling.
-Skip it if your sport is pure strength/power or sprints under ~60 seconds — that time domain doesn't respond.

The catch

-The effect is genuinely small (~2-3% recreational, ~0.5-1% elite) and only shows up in a narrow time window of high-intensity work.
-No upside for 1-rep maxes, heavy low-rep lifting, or short sprints under a minute — most strength work falls outside its wheelhouse.

Safety

-Safe in healthy people at recommended doses. The only common side effect is paraesthesia — a harmless skin-tingling 10-20 min after a dose — which fades with smaller split doses or sustained-release tablets.
-Long-term safety data beyond a few months is limited but reassuring; nothing concerning has emerged.
-If you're pregnant, on medication, or managing a health condition, check with a clinician first.

Key research

Supplements

CreatineStrong Sodium bicarbonateModerate

Educational information, not medical advice. Talk to a healthcare professional before starting a supplement — especially if you're pregnant, nursing, or managing a health condition.

Reviewed Jun 2026

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