Soy products are known to contain high quality proteins and isoflavones, which facilitate growth of new skin cells and prevent signs of ageing. So, add more of soy milk, soybeans, and tofu to your diet. Even topical creams that contain the soy isoflavone, genistein, are quite an effective way in treating wrinkles. But, make sure your soy is organic. Read here to know why: 12 Healthy Foods That You Should Never Eat Again