The flesh of the cucumber is mostly water, but also contains ascorbic acid (vitamin C) and caffeic acid, both of which help soothe skin irritations and reduce swelling–these acids prevent water retention, which may explain why cucumbers applied topically are often helpful for swollen eyes, burns and dermatitis. It’s high in Nutrients, low in calories but high in many important vitamins and minerals. It contains antioxidants, promotes hydration, may aid in weight loss, may lower blood sugar and could promote regularity. Cucumber is helpful to brighten, whiten, and even tighten your skin.