Want to change your skin? Change your diet. Eliminating dairy, caffeine, peanuts, seaweed, sugar, and soy can lead to clearer skin. Swap almond milk for cow milk, bid adieu to brie, and choose water over soda. Good-for-your-skin foods include salmon, dark leafy greens like kale, and antioxidant-rich green tea. Give it a month and see what happens. After all, you are what you eat.