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Along with the epidermal lipids and sebaceous gland-secreted lipids, exogenous lipids originated from topical products, pollution, and microbial metabolism, also importantly comprise the skin surface lipids. As one of the most commonly applied products on the skin, moisturizers can affect various features of skin lipids, including physical properties and biological activities. Emulsion formulation contains mainly water, lipids, emulsifiers, and other ingredients such as bioactive materials. In this talk, the effects of each component on the skin lipids will be briefly discussed.
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