Chemistry & ProductsQuestion 319 of 484
Ceramides are added to moisturizers primarily because they:
a.Provide chemical UV protection equivalent to SPF 15
b.Exfoliate the surface in the same way as glycolic acid
c.Function as anionic detergents that cleanse the scalp
d.Replenish the natural lipid 'mortar' between skin cells to repair the barrier and slow water loss
Explanation
Ceramides are lipids that, together with cholesterol and fatty acids, form the 'mortar' that holds stratum-corneum cells together. Topping up ceramides restores the skin barrier and reduces transepidermal water loss, which is why they are key in barrier-repair moisturizers.
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