According to the article, you may be getting more hair and be less susceptible to sun damaged skin. What isn't clear is whether or not taking melatonin orally a

According to the article, you may be getting more hair and be less susceptible to sun damaged skin. What isn't clear is whether or not taking melatonin orally at typical dosage (300 mcg to 5 mg) will have those effects in humans. It seems that most of those human studies used topical application, and several of the animal studies used melatonin implants. Also, here is a quote from one of the references (Kleszczynski and Fischer, 2012): > Regarding clinical application, exogenous melatonin should rather be used topically than orally, since orally administered melatonin appears in rather low levels in the blood due to prominent first-pass degradation in the liver, thus limiting skin access. Topical application might be meaningful, since melatonin can penetrate into the stratum corneum and build there a depot due to its distinct lipophilic chemical structure. Therefore, endogenous intracutaneous melatonin production, together with topically applied exogenous melatonin or metabolites can be expected to represent one of the most potent antioxidative defense systems against UV-induced skin aging.