The term “lactic acid” can refer to a few different things. In the fitness world, it relates to an acid that builds up in the muscles during strenuous exercise. In the beauty world, lactic acid is an alpha-hydroxy acid, along with glycolic acid, mandelic acid, and salicylic acid, that can be created naturally or formed in a lab.
Lactic acid is a naturally occurring ingredient found in sour milk products like yogurt and keider. As the milk ferments, it turns sour and lactic acid is created. Legend has it that Cleopatra used to take sour milk baths as a way of maintaining her beautiful, youthful appearance. What’s good for Cleopatra must certainly be good enough for our skin. Lactic acid provides the perfect introduction to the beneficial world of AHAs that is gentle and effective for most skin types.