Young Chemist Citric acid is a naturally occurring organic acid that is commonly used in cosmetic products. It is derived from citrus fruits, such as lemons and limes, and is known for its acidic properties and pleasant citrus scent. In cosmetics, citric acid is used as a pH adjuster, preservative, and exfoliating agent. More : https://www.theyoungchemist.com/detail/citric-acid.html