Moisturizers can feel like a mystery until you know how to read the INCI list. This week’s article breaks down the big three—humectants, emollients, and occlusives—so you can scan a label and quickly tell if a product will hydrate, soften, or ...

Not all hyaluronic acid is created equal. The size of the molecule — its “molecular weight” — decides how far it can travel in your skin. Big HA molecules sit on the surface and lock in water, while smaller ones slip deeper into the epidermis ...