Glycolic acid decreases corneocyte cohesion and corneum layer thickening, all of which are linked with many common skin conditions, like acne, dry and wrinkles. Glycolic acid works by dissolving the internal cellular cement that causes abnormal keratinization, allowing dead skin cells to be sloughed away. It also increases skin hydration by increasing moisture absorption and the skin's capacity to bind water. Glycolic acid has a higher diffusion rate owing to its lower molecular weight. If a product contains a high glycolic acid concentration and/or a low pH, it can be irritating to the skin and mucous membranes. However, glycolic acid is most often used in anti-ageing cosmetics due to its hydrating, moisturising, and skin-normalizing properties, which helps reduce the appearance of fine lines and wrinkles.