The use of paraben preservatives, such as alkyl esters and p-hydroxybenzoic acids, goes back over decades to when they were first introduced in the 1920s.1 Nowadays, synthetic parabens are found in 80 percent of all personal care products, including cosmetics. These preservatives are widely used because of their antimicrobial impact. There are various types of synthetic parabens, such as methylparaben, ethyparaben, proplparaben, and butylparaben.