International society of sports nutrition position stand: Beta-Alanine.
Level 5 - mechanism / opinion, no new human data
Narrative review and expert position stand
PubMed 26175657 · doi:10.1186/s12970-015-0090-y
What was done
The International Society of Sports Nutrition (ISSN) conducted a critical review of the literature on mechanisms, safety, and exercise performance outcomes associated with beta-alanine supplementation to establish an official position stand.
What was found
Supplementation with 4 to 6 g daily of beta-alanine for at least 2 to 4 weeks significantly increases muscle carnosine concentrations and improves exercise performance, with the most pronounced benefits observed in open end-point tasks or time trials lasting 1 to 4 minutes. It attenuates neuromuscular fatigue, especially in older individuals, and preliminary evidence suggests benefits for tactical performance. Paraesthesia is the only reported side effect, which can be mitigated with divided lower doses (1.6 g) or sustained-release formulations. The abstract provides no specific numerical effect sizes or statistical test results.
Why it matters
This consensus position stand establishes standard dosing protocols (4 to 6 g/day for at least 2 to 4 weeks) and defines short-duration, high-intensity exercise (1 to 4 minutes) as the primary performance domain benefiting from beta-alanine supplementation.
Limits
This is a narrative review and expert consensus statement rather than a systematic review or meta-analysis, and no total sample size is reported. Quantitative effect sizes are not given in the abstract. The abstract notes that evidence remains insufficient to determine effects on strength, endurance exercise lasting longer than 25 minutes, and general carnosine-related health outcomes.
Cited by
- supports Beta-alanine does not provide significant benefits for maximal strength, speed, power, or long-duration endurance.
- supports Beta-alanine requires 3 to 5 weeks of chronic daily dosing to accumulate sufficiently in muscle tissue before providing performance benefits.