While you're applying your moisturizers, serums, and cleansers to the outside of your skin, there are a few things that you can put into your body that way you're helping your skin from the inside out. A few of the things that you want to make sure you're getting are vitamins A, C, E, and D. Vitamin A helps treat wrinkles, vitamin C helps create collagen, Vitamin E helps get rid of acne and vitamin D helps fight infections.