Support fuller, healthier hair-while you sleep. Lambdapil Hair Density Lotion With Melatonin is a non-greasy, fast-absorbing scalp treatment that helps to minimize hair loss directly at the root. With topical melatonin acting as a potent antioxidant, it works overnight to support healthy hair growth and boost thickness. Visible results in 1 month, with continued improvements over time. | ISDIN Lambdapil® Hair Density Lotion With Melatonin, 3. 4 FL oz | Dermstore