The latest greatest product is hyaluronic acid. It absorbs its weight in water probably by 300 times; some even say 1000 times. When you apply to your skin, it takes environmental moisture, (not moisture from your skin), grabs it, and applies it to your skin. Use this before you use anything else, twice a day. Put a drop in your palm and let it set for a moment on your face. Just that small amount absorbs a tremendous amount of moisture, sucks it out of the environment and puts it into your skin. Use whatever you wish after that, like your favorite moisturizing lotion. It is a primer to your skin.