5HTP is a natural amino acid found in the body. Serotone also contains specific co-factor B vitamins & zinc. Available in 50mg & 100mg size capsules. Not advisable if pregnant or taking fenfluramine. Care should also be taken if being prescribed SSRIs. Does not contain Valerian. Contains carrageenan.• Contains B Vitamins & Zinc • Best taken in the evening with a carbohydrate snack