L-Tryptophan 500 mg - 60 caps.

Helps maintain healthy serotonin levels, promotes restful sleep, and regulates the body's circadian rhythms. Helps combat jet lag. An essential amino acid that must be obtained from food or supplements. Looking for effective sleep support? Swanson L-Tryptophan offers 500 mg of L-tryptophan per capsule to help maintain healthy serotonin levels and ensure restful sleep. L-tryptophan, an essential amino acid, must come from food or as a supplement. Large batch testing has shown no Peak-E in this product. Recommended use: as a dietary supplement.