Beta-alanine
A small gain in efforts of 30 seconds to 10 minutes; works only as a course
What it is
A substance that, taken regularly, raises carnosine levels in muscle; carnosine acts as a pH buffer inside the cell (ISSN).
Benefits
The effect is small: about 0.2–3% in continuous and intermittent efforts lasting 30 seconds to 10 minutes (IOC). Per ISSN, it is most pronounced in efforts of 1–4 minutes. Assessments differ: AIS puts it in the group with strong evidence, while NIH ODS notes that some studies found no benefit and that experts lack consensus.
Dose
ISSN: 4–6 g a day in doses of 2 g or less, for at least 2 weeks, better 4. IOC: about 65 mg/kg a day, 0.8–1.6 g every 3–4 hours, for 10–12 weeks. AIS: 4 doses of 1.6 g with food (6.4 g a day) for the first 4 weeks, then a maintenance dose, which the AIS document itself states inconsistently: 1.2 and 1.6 g a day.
Dose by body weight
65 mg per kg of body weight a day, no more than 6,400 mg a day
| Weight | Daily dose, mg |
|---|---|
| 50 kg | 3,250 |
| 60 kg | 3,900 |
| 70 kg | 4,550 |
| 80 kg | 5,200 |
| 90 kg | 5,850 |
| 100 kg | 6,400 (hits the daily limit) |
When to take it
It works by accumulation: you need a course of about 4 weeks, and a single dose before training does nothing (ISSN, AIS). Take it with meals, which improves carnosine loading. AIS suggests starting a month before a block of high-intensity training or competition.
Who it's for
People whose competitive efforts last 30 seconds to 10 minutes: rowing, swimming, track cycling, middle-distance running (AIS).
Who can skip it
In efforts longer than 4 minutes the benefit is more modest, and evidence for endurance is conflicting (NIH ODS). Whether beta-alanine adds strength and muscle mass in resistance training is not established: ISSN has called for more research. The effect is harder to achieve in well-trained athletes (IOC).
Forms
Beta-alanine comes in a regular form and a sustained-release form. Skin tingling usually appears when more than 800 mg of the regular form is taken at once and passes within 60–90 minutes; with the sustained-release form it is substantially weaker (ISSN). Divided doses of 1.6 g also help reduce tingling.
Safety
The main side effect is skin tingling with more than 800 mg at once; it lasts 60–90 minutes and, on current evidence, is not harmful. Divided doses and sustained-release forms help (ISSN). Itching and rashes are possible (NIH ODS, IOC). No data on use beyond 1 year. We found no data for pregnancy, teenagers or medicines: see a doctor first.
This is a summary of public sources, not medical advice. If you have a health condition, are pregnant or take medication, talk to a doctor before taking a supplement.
Sources
- ISSN position stand: Beta-Alanine . ISSN, 2015.
- IOC consensus statement: dietary supplements and the high-performance athlete . IOC, 2018.
- AIS Sports Supplement Framework — ß-Alanine, Practitioner Fact Sheet . AIS, 2025.
- Dietary Supplements for Exercise and Athletic Performance — Health Professional Fact Sheet . NIH ODS, 2024.
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