Category: Amino Acids
Phenylalanine is an essential amino acid used by the body to synthesize proteins and other important molecules such as neurotransmitters (e.g., dopamine, norepinephrine). It cannot be made by the human body and must be obtained from the diet. It exists in two forms: L-phenylalanine (biologically active form) and D-phenylalanine (used in supplements).
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