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A comparative study of the effects of retinol and retinoic acid on histological, molecular, and clinical properties of human skin - Kong - 2016 - Journal of Cosmetic Dermatology - Wiley Online Library
How to Pick the Best Retinol Cream for You, According to a Dermatologist • Modern Dermatology Seattle Washington
4.5% Retinol Complex Night Treatment - Coveteur: Inside Closets, Fashion, Beauty, Health, and Travel
Amazon.com: PCA SKIN Intensive Clarity Treatment - 0.5% Pure Vitmain A Retinol & 2% Salicylic Acid Face Serum for Acne-Prone Skin (1 oz) : Beauty & Personal Care
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How to Use Retinol on Sensitive Skin, According to Derms | Allure
The Science Behind the Skin Care All-Star Retinol | Wellspa 360