New answers tagged dermatology
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Both retinoids and benzoyl peroxide must be absorbed by the skin to do their work. If you have make-up on or oily skin etc. this can be a barrier to absorption so must be cleaned off. The cleaner your skin, the more is absorbed and therefore the more effective it is.
Tretinoin is a synthetic form of a retinoid used to treat acne however the mechanism of ...
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