Lactic acid is an alpha hydroxy acid (AHA) that’s originally derived from milk—although Glo uses only vegan lactic acid in all our products. Lactic acid for skin acts as a gentle exfoliant, helping to remove dead skin cells by dissolving the bonds that hold them together. By stimulating the shedding of dead skin cells that can make the surface of your skin appear dull or textured, lactic acid increases the speed of cell turnover, making way for new cells and a smoother, more radiant complexion. It also helps to boost collagen production, diminishing the appearance of fine lines and wrinkles—that’s why you’ll see lactic acid in anti-aging skincare products too. And, as if all that wasn’t enough, lactic acid for skin also is a humectant, meaning it draws moisture into the skin, helping to support moisture levels. Gentle enough for sensitive skin—depending on the other ingredients it’s formulated with, if you’re looking to boost brightness plus soft, smooth, hydrated skin, lactic acid products will be your go-to.