| Tyrosine (abbreviated as Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 amino acids that are used by cells to synthesize proteins. Tyrosine can be synthesized by the body to create tyramine (see above). Tyrosine is often found in the protein building drinks used as part of an exercise program. Be sure to check labels. This is one you should try to avoid.
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