Oranges
Best known as a good source of vitamin C, oranges are a go-to food when your immune system needs a little boost. Vitamin C is also thought to stimulate collagen production (a reason it pops up in so many skin creams and products), so eating lots of oranges could help keep your skin looking smooth and supple, too. In addition to their high vitamin C content, oranges also have other good stuff like folate, potassium, and vitamin B1.
Recipe: Skinny Orange Chicken