An exercise physiologist explains lactic acid, and it's impact on our bodies. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. What is ...

Lactic acid is the gentle exfoliant making waves in skincare. Discover why experts say it could be the key to brighter, smoother, and healthier-looking skin.

Lactic acid is an over-the-counter chemical exfoliant that comes from the fermentation of lactose — a carbohydrate found in milk. It's a popular ingredient in numerous skin care products nowadays.

Take lactic acid, for instance: it's an acid that's naturally present in dairy products and can be extracted and used as an exfoliant when products like milk go bad. This isn't to say that you ...