Vitamins > Amino Acids

L-Phenylalanine 500 mg: 3209 Twinlab L-Phenylalanine Capsules are easier to swallow and assimilate. Well tolerated by the most highly allergic individuals. Packaged in a glass bottle for maximum stability, quality and freshness. This product is manufactured at our own state of the art facilities. L-Phenylalanine is an essential amino acid, and Tyrosine precursor that works with vit B-6 on the central nervous system as an anti-depressant and mood elevator.