MELATONIN: Allergen or Not An Allergen?

Not An Allergen Melatonin While still relatively new to skincare (and an ingredient’s allergenicity is related to how common it is), so far, melatonin does not have case reports of contact allergic reactions. There are already excellent laboratory studies (ex vivo, or outside the living body) on the anti-aging effects of topically applied melatonin (counteracting […]