Muscle carnosine metabolism and beta-alanine supplementation in relation to exercise and training
ReviewHumansWith beta-alanine (carnosine precursor)
This study tested carnosine together with beta-alanine (carnosine precursor). Its results cannot be assigned to carnosine alone. More combination studies.
- Design
- Review
- Subjects
- not stated in abstract
- Dose used in the study
- not stated in abstract
- Duration
- not stated in abstract (chronic oral beta-alanine intake)
- What was measured
- Narrative review of muscle carnosine metabolism, beta-alanine loading, proposed mechanisms, and factors that affect muscle carnosine content.
What the authors reported
The authors report that carnosine is made in muscle from L-histidine and beta-alanine, with beta-alanine as the rate-limiting precursor, and that chronic oral beta-alanine can raise human muscle carnosine by up to 80%. They state that carnosine loading improves high-intensity exercise performance in untrained and trained people. Proposed mechanisms include buffering of acidosis, improved excitation-contraction coupling and defence against reactive oxygen species. Muscle carnosine is higher with more fast-twitch fibres, lower in women, declines with age and is probably lower in vegetarians.
Limits of this study
The authors state that side effects and the mechanism of action need further investigation. Several weeks of training had only limited acute effects on muscle carnosine.
Source
No PubMed record or DOI. See the citation above.
Entry checked against abstract (Sigma-Aldrich paper record; citation checked against SPONET record) on 2026-10-11. The dose shown is the dose the researchers used. It is not a recommendation. How to read this page.