The Metabolic Health Lab

The Metabolic Health Lab

Beta-alanine for high-intensity athletes

How to improve endurance, buffer fatigue, and boost performance

Kristen Deuel, MSc's avatar
Kristen Deuel, MSc
Aug 15, 2025
∙ Paid

Among the vast array of supplements marketed for athletic performance, beta-alanine has emerged as a popular choice across both recreational and competitive high-intensity athletes. You can find it featured in pre-workout blends, endurance-focused stacks, and standalone powders, and its appeal lies in the science-backed mechanism to increase time to exhaustion, as well as the relatively low side effect profile. Despite its growing popularity, questions still remain: Which athlete truly benefits? How effective is it under real-world conditions? And what should practitioners consider when recommending it to clients?

How it works

Beta-alanine is a non-proteogenic amino acid, meaning it is not incorporated into a complete protein, and plays a critical role in exercise physiology. Naturally synthesized in the liver and found in foods like poultry and meat, its primary function lies in serving as a precursor to carnosine, a dipeptide that buffers hydrogen ions (H+) in muscle cells during exer…

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