BCAA (branched-chain amino acids) are essential amino acids, which means that they cannot be produced by the body and must be obtained through the diet or supplementation. The three BCAAs are leucine, isoleucine, and valine, and they are found in a variety of protein-rich foods, such as meat, dairy, and legumes.
When taken as a supplement, BCAAs are typically derived from either animal or plant sources. Animal-based BCAA supplements are typically sourced from whey protein, while plant-based supplements may be sourced from soy, peas, or other plant-based protein sources.
It's important to note that the quality and purity of BCAA supplements can vary depending on the source and manufacturing process, so it's always a good idea to choose a reputable brand and look for a product that has been third-party tested for purity and potency.