Are oils/emollients bad for skin?Indeed, frequent use of natural oil-based moisturizers can result in unwanted consequences. One such negative outcome can be disruption of tightly packed and uniformly organized lamellar membranes in the stratum corneum. When applied to the skin, vegetable oil triglycerides will be hydrolyzed by endogenous lipases into their constituent free fatty acids that in turn will integrate into the highly rigid structure of the lipid lamellae, which are composed of ceramides with mostly saturated very-long-chain fatty acids, free fatty acids, and cholesterol. This induces phase separation with discontinuities in the extracellular matrix. Furthermore, unsaturated fatty acids in natural oils can be easily oxidized and bring additional disorder into lamellae lipid membranes. Finally, natural oils such as olive oil are known to facilitate penetration of allergens across the stratum corneum into the deeper skin regions.Besides natural oils called out here, wouldn’t synthetic esters and other liquid thin emollient would do the same - disrupting the tightly packed and uniformly organized lamellar membranes in the stratum corneum because of the different polarity and quick absorption?Also ceramides containing product - If ceramides the waxy stuff can be solublized by the oils or emulsifiers here, wouldn’t the product solublize my own ceramides if I apply it onto my skin?
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