There’s a kernel of truth to this whole “beauty rest” thing: During the night, your skin actually absorbs the nutrients in your products better than during the daytime, according to Parvaneh Rafaeloff, MD, medical doctor at Le Jolie Medi Spa. “Additionally, there aren’t environmental stressors at night (like environmental pollution and sun damage) while you sleep; products are able to better penetrate when you’re not wearing makeup while you sleep and the skin can breathe,” she adds.

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