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.
 
Uses & Benefits
Helps build lean muscle mass
Provides athletic support
Used as a workout supplement for muscle recovery
Provides a highly usable form of the essential amino acid L-tryptophan
Supplies a precursor for serotonin and melatonin
Contributes to protein synthesis