When it comes to vitamin supplements, most tend to fall into one of two categories: Vitamins we feel like we should be taking ...

Citric acid, an AHA, is an exfoliating skin-care ingredient. Learn citric acid's benefits for skin and how to use it.

Citric acid is an organic acid found in citric fruits, but it's commonly used as a preservative in packaged foods and drinks. Find out if it's safe to eat.

The list of skin-care products formulated with alpha-hydroxy acids (AHAs) is pretty lengthy. Differentiating each acid can be quite confusing, especially when you’re simply looking for one ...