This is another food with a disclaimer. A little coffee is fine. But if you’re a coffee fiend, you should know that coffee can contribute to an old-before-your-time face. Coffee is dehydrating and a lack of water shows up in your skin. Dehydration not only has health consequences, it shows up in cracked, lined, and wrinkled skin. Drink at most one or two cups of coffee a day and make sure you offset the dehydration factor with an extra eight ounces of water for each cup of coffee you drink.