Sulfates are surfactant and foaming agents commonly used in cleansing products like facial cleansers, body cleansers and shampoos to create a rich lather and effectively remove dirt, oils and impurities from skin or hair. Sulfates can cause potential skin irritation for some individuals, especially those with sensitive skin and there have been concerns around its safety in certain formulas. Because sulfates can be harsh on skin, some prefer sulfate-free alternatives in their skincare routines.