Do you still top up on oranges for your vitamin C boost? Think again, with number 4 on the list of surprising superfoods.

Kiwis
Why?: Kiwis have more immune-system-strengthening vitamin C than grapefruits, oranges, or strawberries.
How to Enjoy: Switch out your usual berries with kiwis to put on Greek yogurt, or toss them in your favourite salad.