5-htp (a.k.a. 5-hydroxytryptophan) is an amino acid that the body naturally produces. Most importantly the body uses 5-htp to produce serotonin. Unfortunately, low serotonin levels can mean weight gain, mood issues, and poor sleep, among other health concerns. Many people have turned to 5-htp supplements to help balance their serotonin levels.
Manufacturer likely did not include an allergen statement; however, please double-check the product packaging and/or contact the manufacturer if you have a severe food allergy.