Which skincare products should I refrigerate?

The products that benefit most from refrigeration are vitamin C serums, retinol and retinoid products, natural or organic products without synthetic preservatives, eye creams and gels, sheet masks, facial mists, and aloe vera gel. Products you should NOT refrigerate include oil based products (which can solidify), clay masks (which can change texture), and anything with wax as a primary ingredient. When in doubt, check the product label some brands specifically recommend refrigeration.