Carnosine is a rather expensive amino acid. Many take the cheaper beta alanine instead which your body converts to carnosine.
Role of beta-alanine supplementation on muscle carnosine and exercise performance
https://pubmed.ncbi.nlm.nih.gov/20479615/
Carnosine and Beta-Alanine Supplementation in Human Medicine: Narrative Review and Critical Assessment
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10096773/
Thanks for posting this...!