One of the most popular alpha hydroxy acids, citric acid is often used as a chemical exfoliant.

This means that it can help to slough off dead skin cells, declog pores, and even out skin tone. Citric acid can be derived from citrus fruits like lemons and oranges.

Citric acid can help to brighten your skin and improve its overall appearance. In addition, citric acid can also help to fight acne by reducing the build-up of dead skin cells and sebum.