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Beta-alanine

Raises muscle carnosine to buffer acid — a genuinely effective ergogenic for that burning 1–4 minute effort.

Reviewed by Bodil Isaksson, Licensed Biomedical Scientist (Sweden)Last reviewed July 2026Supplement guide

SupplementsAmino acidsPerformanceEndurance

Beta-alanine is one of the better-evidenced sports supplements. It works slowly, by loading the muscle with carnosine over weeks.

Key takeaways

  • Beta-alanine raises muscle carnosine, which buffers the acid (H+) that builds up in hard exercise.1
  • It reliably improves high-intensity efforts lasting ~1–4 minutes.1
  • Dose is 4–6 g/day for at least 2–4 weeks — it works by loading, not acutely.
  • The harmless tingling (paraesthesia) can be reduced with smaller split doses or sustained-release forms.

What it is

Beta-alanine is the rate-limiting building block of carnosine, a dipeptide stored in muscle that soaks up hydrogen ions during intense exercise, delaying the drop in pH that causes fatigue.

The evidence

The ISSN position stand concludes that 4–6 g/day for 2–4 weeks raises muscle carnosine and improves performance, particularly in open-endpoint tasks and time trials of 1–4 minutes.1

Dose & how to use

4–6 g/day, taken daily for weeks; timing within the day doesn't matter. Split into ≤1.6 g doses or use sustained-release to limit tingling.

Safety & who benefits

Safe at recommended doses; the only common effect is transient paraesthesia (skin tingling). Most useful for repeated sprints, rowing, swimming and CrossFit-style efforts.

Bottom line: a well-proven buffer for the 1–4 minute burn — take it daily for weeks, and don't worry about the tingling.

References

Adult research summary for education, not a prescription. These are food supplements, not treatments for disease.

  1. Trexler ET, et al. International Society of Sports Nutrition Position Stand: Beta-Alanine. J Int Soc Sports Nutr 2015. pmc.ncbi.nlm.nih.gov

This article summarises nutrition and exercise science for education. It is not a substitute for individual medical advice; consult a professional before starting a supplement, in pregnancy, or alongside medication.