5-HTP is 5-hydroxytryptophan, a metabolite of tryptophan, and an essential precursor of serotonin and melatonin in the body. Each capsule provides 100mg of 5HTP giving a higher dose than the regular supplement for those want to take one higher strength capsule. Note: This product is not intended to diagnose, treat, cure, or prevent any disease, nor should supplements be used as a substitute for a balanced diet. Not intended for pregnant/breastfeeding mothers or children under 18. Do not exceed the recommended dose.