Amino acids are either extracted from plants or animals or manufactured in a laboratory through chemical synthesis. Plant-based sources include sugarcane, beet, peas, corn and more. Animal sources can be derived from meat and animal-produced nutritional substances like milk to make whey-based supplements, as well meat byproducts such as human hair, feathers, fish silage, blood, stomach contents and the like. At the end of the day, all amino acid molecules are structurally identical regardless of the source, and all are equally effective for their intended health benefits.
While the source of the amino acids in your supplements vary, it can be difficult, if not impossible, to determine sourcing information from labels alone. This can result in consumers ingesting ingredients that are sourced or produced in a manner that is inconsistent with their dietary philosophies and values related to the ethical treatment of animals, sustainable eating, farming practices and more.