Want to keep your complexion smooth and youthful? Take a look at your plate. What you leave off of your plate is sometimes just as important as the food you’re putting on your plate when it comes to nutrients that can affect your complexion. Put your best face forward (and improve your health) by keeping these to a minimum (remember that classic motto... moderation):
Sugar—Sweets and refined carbs raise glucose levels, which increases advanced glycation end products, which in turn interferes with the repair of collagen and elastin, a protein that allows skin to retain its shape.
Saturated Fat—Found in marbled meats and full-fat dairy products, saturated fats may make you look older. Experts say that eating a lot of saturated fat can induce skin-aging inflammation.
Alcohol—With the exception of resveratrol-delivering red wine, alcohol can take a toll on your skin. It dries out skin and when metabolized in the liver, it creates skin’s enemy: free radicals.
Credit : http://health-and-beauty-information.blogspot.com/2012/09/3-foods-to-avoid-if-you-want-to-look.html