Cucumber

Cucumber is often applied topically to areas of the skin to improve moisture levels and fade wrinkles, particularly around the eye area. But make sure you eat those slices afterwards, because they're rich in collagen-boosting vitamins A and C, as well as vitamin K, which is essential for bone strength and proper brain function. Cucumbers also contain lutein and zea-xanthin - natural compounds that seek out and destroy harmful toxins in the body.