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Description
They are commonly sold as research peptides, and the FDA has acted to restrict peptides in pharmacy compounding

BCAAs, such as leucine, isoleucine, and valine, are metabolized primarily in the muscles, and the byproducts of their metabolism contribute to muscle fatigue and discomfort

10.1101/gad.12.7.1022 Genes Dev
Exogenous hydrogen sulfide regulates the growth of human thyroid carcinoma cells
