Vitamin C
Why you need it: Vitamin C is an important antioxidant, and it’s also a necessary ingredient in several key bodily processes, such as protein metabolism and the synthesis of neurotransmitters.
Where to get it: Most people think citrus when they think of vitamin C, but sweet red peppers actually contain more of the vitamin than any other food: 95 mg per serving (well ahead of oranges and just edging out orange juice, at 93 mg per serving). Other good sources include kiwi fruit, broccoli, Brussels sprouts, and cantaloupe.