Introduction to Retinol Vitamin A and its derivatives have been utilized in both prescription and cosmetic over‑the‑counter (OTC) anti-aging creams for decades. Retinol, a form of Vitamin A, has been shown to improve the appearance of collagen-depleted skin, complement skin’s natural renewal process, and fight signs of aging. Retinol was discovered over a century ago, but it wasn’t until …

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