Putting aside the claims, hype, and misleading information you may have heard, the only real difference between a daytime and nighttime moisturizer is that the daytime version should contain a well-formulated sunscreen.
For daytime wear, unless your foundation contains an effective sunscreen, it is essential that your moisturizer feature a well-formulated, broad-spectrum sunscreen rated SPF I5 or higher. Well-formulated means that it contains UVA-protecting ingredients, specifically titanium dioxide, zinc oxide, avobenzone (also called butyl methoxydibenzoylmethane or Parsol 1789), Tinosorb, or Mexoryl SX (ecamsule).
Your skin doesn’t do special healing at night nor is it more “receptive” to nutrients, despite what you might hear from a cosmetics salesperson. Diet is the best way to think about this, just like your body needs a healthy diet in the morning as well as at night, skin needs the same: healthy ingredients morning and night.
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