A well-formulated eczema product typically combines barrier-repair lipids such as ceramides, free fatty acids, and cholesterol in a physiologically relevant ratio, alongside humectants like glycerin or hyaluronic acid and occlusives such as petrolatum or shea butter. Colloidal oatmeal is FDA-recognized as an OTC skin protectant. Your cosmetic chemist should also exclude common sensitizers — fragrances, methylisothiazolinone, and high-alkalinity surfactants — from the formula entirely.
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