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2. Amino acid - Wikipedia

   en.wikipedia.org/wiki/Amino_acid

   The 20 amino acids that are encoded directly by the codons of the universal genetic code are called standard or canonical amino acids. A modified form of methionine (N-formylmethionine) is often incorporated in place of methionine as the initial amino acid of proteins in bacteria, mitochondria and plastids (including chloroplasts).

3. Essential amino acid - Wikipedia

   en.wikipedia.org/wiki/Essential_amino_acid

   An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized from scratch by the organism fast enough to supply its demand, and must therefore come from the diet. Of the 21 amino acids common to all life forms, the nine amino acids humans cannot synthesize are valine, isoleucine, leucine, methionine ...

4. Dietary supplement - Wikipedia

   en.wikipedia.org/wiki/Dietary_supplement

   A dietary supplement is a manufactured product intended to supplement a person's diet by taking a pill, capsule, tablet, powder, or liquid. [2] A supplement can provide nutrients either extracted from food sources, or that are synthetic (in order to increase the quantity of their consumption). The classes of nutrient compounds in supplements ...

5. Branched-chain amino acid - Wikipedia

   en.wikipedia.org/wiki/Branched-chain_amino_acid

   A branched-chain amino acid (BCAA) is an amino acid having an aliphatic side-chain with a branch (a central carbon atom bound to three or more carbon atoms). Among the proteinogenic amino acids, there are three BCAAs: leucine, isoleucine, and valine. [1] Non-proteinogenic BCAAs include 2-aminoisobutyric acid and alloisoleucine.

6. Bodybuilding supplement - Wikipedia

   en.wikipedia.org/wiki/Bodybuilding_supplement

   Bodybuilding supplement. Bodybuilding supplements are dietary supplements commonly used by those involved in bodybuilding, weightlifting, mixed martial arts, and athletics for the purpose of facilitating an increase in lean body mass. Bodybuilding supplements may contain ingredients that are advertised to increase a person's muscle, body weight ...

7. Protein (nutrient) - Wikipedia

   en.wikipedia.org/wiki/Protein_(nutrient)

   Protein is a nutrient needed by the human body for growth and maintenance. Aside from water, proteins are the most abundant kind of molecules in the body. Protein can be found in all cells of the body and is the major structural component of all cells in the body, especially muscle. This also includes body organs, hair and skin.