Natural Factors L-Tryptophan 220 mg 90 veggie capsules



  • Supplies a precursor for serotonin and melatonin
  • Helps build lean muscle mass
  • Provides athletic support
  • Used as a workout supplement for muscle recovery

Natural Factors L-Tryptophan is a workout supplement that provides an essential amino acid needed for muscle protein synthesis. As a free-form amino acid, L-tryptophan is more effective than the form obtained directly from food. Supplementing with L-tryptophan helps the body build lean muscle mass when combined with regular resistance training and a healthy balanced diet. Support your active lifestyle with this one-per-day, naturally fermented, vegetarian source of L-tryptophan.

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