What to look for on the label: Hyaluronic acid, hyaluronan and sodium hyaluronate.
For best results: Use liberally wherever your skin is dry and needs hydrating. Hyaluronic acid isn't irritating and won't interact negatively with, or compromise the effectiveness of, other skincare ingredients you might be using.
You should know: To smooth very dry skin, you'll need more than hyaluronic acid alone. Start by applying a hyaluronic acid serum or light lotion on clean skin, then top it with a rich moisturizer in a lotion or a cream that contains ceramides (moisture-retaining lipids).
Dior Hydra Life Pro-Youth Sorbet Eye Crème ($49; dior.com)
Dr. Jart+ Water Fuse Beauty Balm SPF 25 PA++ ($34; sephora.com)