Quattro Beauty Advanced beauty Rest & Sleep Complex is formulated with key ingredients including Melatonin, Magnesium, 5-HTP (5-Hydroxytryptophan) and GABA to support sleep. 5-HTP (5-Hydroxytryptophan) is a chemical by-product of the protein building block L-tryptophan. It is also produced commercially from the seeds of an African plant known as Griffonia simplicifolia. 5-HTP is used for sleep disorders such as insomnia. What does Beauty Rest have to do with great skin care? Getting proper rest and a good night's sleep is not only a stress reliever, but it's essential to your mental and physical health as well as the health of your skin. Melatonin L-Theanine GABA 5-HTP Phellodendron root powder Natural. Non-GMO. Vegetarian. 60 Veggie Caps.