You know you need sunscreen in your moisturizer, and you probably know why you need antioxidants. (They neutralize wrinkle-creating free-radicals caused by pollution and ultraviolet rays.) From green tea to pomegranate, just about every serum on the market contains some kind of antioxidant wonder ingredient.

Similarly, if you color your hair, you know that you need to protect your color from the sun. (There's a reason your color fades faster in the summer.) Most color-preserving shampoos, conditioners, and styling products contain UV filters that act like sunscreen for your hair, as well as antioxidants that neutralize free radicals. (In hair, free radicals contribute to brittleness and dullness.)

The Aveda Sun Care Protective Hair Veil, $27, has filters derived from wintergreen and cinnamon bark oils. Plus, it contains the antioxidants green tea, sunflower oil, and vitamin E to protect from free-radical damage to the scalp and hair. Another great option is Ouidad Biotin Lightweight Reparative Hair Serum, $42, which contains hair-strengthening biotin in addition to antioxidants.