Retinal, also known as retinaldehyde, is an advanced vitamin A derivative that is highly valued in K-Beauty for delivering visible anti-ageing and skin-renewing benefits with impressive efficacy. It converts to retinoic acid in just one step, making it faster-acting than retinol while often remaining well tolerated when used correctly. Retinal helps improve skin texture, reduce the appearance of fine lines and wrinkles, fade post-acne marks, and support clearer, more even-toned skin. In K-Beauty formulations, it is frequently combined with hydrating and barrier-supporting ingredients to enhance results while helping to minimise dryness and irritation.