Beta-Alanine
Beta-alanine is an amino acid that combines with histidine in muscle to form carnosine, a compound that buffers the acidity produced during hard exercise. Supplementation raises muscle carnosine stores over weeks of daily use.
What published research reports
The International Society of Sports Nutrition position stand (2015) reports that four weeks of beta-alanine supplementation at 4–6 g per day significantly raises muscle carnosine and improves exercise performance, with the clearest effects in continuous or intermittent efforts lasting roughly one to four minutes. It states that supplementation appears safe in healthy populations at recommended doses, and that the main reported side effect is paraesthesia — a harmless tingling — which can be reduced by splitting the dose into smaller servings or using sustained-release formulations. The document reports that benefits for efforts shorter than about 60 seconds are less consistent, since those efforts rely less on the buffering systems carnosine supports.
References
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