Nature's Way 5-HTP Description: l-5-Hydroxytryptophan is the precursor to serotonin, a mood and appetite regulating neurotransmitter produced within the body. It has been combined with Vitamin C and Vitamin B6, an important cofactor in the conversion to serotonin. The tablets are easy-to-swallow, enteric-coated tablets to minimalize any potential gastric discomfort. Free Of Lactose, milk, soy, wheat and yeast. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.