Lactic Acid (Lactic Acid)

Lactic Acid is a naturally occurring alpha hydroxy acid (AHA) widely used in cosmetic formulations for gentle exfoliation, hydration support, and improved skin radiance. It helps loosen and remove dull surface cells to refine the look of texture and uneven tone, while also acting as a humectant to enhance moisture retention and promote a smoother, softer feel. Lactic acid is commonly featured in brightening and resurfacing concepts, and is found in leave-on serums and lotions, masks, peel-style treatments, and body care products where a refined, polished finish is desired. In addition to its skin benefits, it is frequently used as a pH adjuster to optimize formula stability and preservative performance. Use level and tolerability depend on concentration, final pH, and product format, and formulations are typically balanced with soothing and barrier-supportive ingredients—along with daily broad-spectrum sun protection—to help maintain results and minimize sensitivity.