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As far back as 3000 years ago, Egyptians used vitamin A from rat livers to treat various health problems. Scientists confirmed the necessity of vitamin A in normal skin health and appearance in the early 20th century. By 1968, scientists began developing synthetic vitamin A derivatives, called retinoids, which were safer and provided improved clinical efficacy. Dermatologists then began prescribing topical retinoids for the treatment of acne. Scientists first developed the retinoid called tretinoin. However, today...
Salicylic acid is an extremely common ingredient in over-the-counter acne products, as well as professional chemical peels. It is an acid that can exfoliate the skin (remove dead skin cells from the skin surface and from inside pores), but it can also reduce skin oil production, decrease inflammation, and act as a mild pain reliever and disinfectant. Thanks to these properties, salicylic acid decreases the chances of breakouts and provides some relief of acne symptoms...