The systematic review noted beta-alanine consistently delays fatigue in female athletes.
The active nutrition landscape has primarily relied on clinical data derived from male or mixed-sex cohorts to validate the effects of the potentially ergogenic ingredient beta-alanine, a new systemic review states. This clinical bias leaves a substantial knowledge gap regarding how these supplements function specifically in women. The review and meta-analysis published in Frontiers in Nutrition directly addresses this disparity, evaluating the specific physiological impact of beta-alanine supplementation on female athletes.1
For nutraceutical manufacturers, this study offers new insights to consider when developing targeted sports nutrition lines for women.
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The researchers conducted a comprehensive literature search across PubMed, Web of Science, Scopus, the Cochrane Library, and Embase from inception through April 30, 2026. The investigators isolated randomized controlled trials that compared beta-alanine supplementation against a placebo or control group specifically in female populations.
The resulting meta-analysis aggregated data from 12 reports representing 11 independent randomized controlled trials, totaling 312 women. The primary physiological and performance outcomes evaluated included time to exhaustion (TTE), maximal or peak oxygen uptake (VO₂max/VO₂peak), peak power, anaerobic performance, and body fat percentage. To ensure data integrity, the risk of bias was assessed using RoB 2, while the overall certainty of the evidence was graded via the GRADE framework.
The clear metric of success identified in the pooled data was an improvement in time to exhaustion. Across eight distinct studies involving 187 female subjects, beta-alanine supplementation demonstrated a statistically significant pooled effect in favor of prolonged TTE.
The meta-analysis found that pooled estimates for the remaining performance and body composition outcomes were imprecise. The 95% confidence intervals spanned across trivial and potentially meaningful effects, meaning the current data does not support a clear, definitive pooled effect on peak power, anaerobic performance, VO₂max/VO₂peak, or body fat percentage in women. The authors noted that confidence in these secondary metrics remains limited because of the small evidence base and a very low certainty rating across outcomes after downgrading for risk of bias, imprecision, and publication bias.
Ultimately, the findings suggest an outcome-specific response pattern, with data in favor of beta-alanine supplementation as an effective aid specifically for lengthening endurance capacity in female athletes. “These findings should therefore be interpreted as evidence from trials conducted in women, rather than as evidence explaining female-specific physiology,” the researchers noted.
Insights from The Outlook on Active Nutrition conference in 2025 emphasize the commercial value of optimizing sports supplements for endurance. As explained in a
Beta-alanine functions by increasing the production of carnosine, which acts as a lactic acid buffer in muscle, McDonald explained. While conventional application has targeted short, high-intensity exercise bouts lasting one to four minutes, research also indicated that its buffering benefits may extend to longer performance durations of 25 minutes. One clinical study also suggested beta-alanine supported performance in a 10k run, which can last from 30 to 90 minutes.
McDonald also noted strategic ingredient stacking options, such as combining beta-alanine with creatine to pair lactic acid buffering with cell energy replenishment. Beta-alanine combined with nitric oxide to can improve blood flow. Furthermore, emerging research highlights that amino acids, specifically branched-chain amino acids (BCAAs), help prevent post-activity muscle breakdown in women.
For more insights from Maura McDonald on developing products for the unique physiology of female athletes,
This article was created with assistance from AI. The content has been reviewed and edited by Erin McEvoy, Associate Editor. For more information on the extent and nature of AI usage, please contact us.
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