Retinaldehyde vs Retinol: The Enzymatic Difference That Changes Everything About Vitamin A Skincare
The Retinoid Conversion Ladder Vitamin A in skincare exists on a conversion ladder. At the top is retinoic acid, the biologically active form that binds to nuclear receptors in skin cells and directs cellular behaviour. Retinoic acid is available by prescription under the names tretinoin and all-trans retinoic acid. It works, without question. It also causes significant irritation, dryness, peeling, […]