The flesh of the cucumber contains ascorbic acid and caffeic acid, both of which help soothe skin irritations and reduce swelling. They help prevent water retention, and are an excellent remedy for tired eyes and dark circles. Cucumber juice is often recommended as a source of silica to improve the complexion and health of the skin, plus cucumber’s high water content makes it naturally hydrating—a must for glowing skin. Facial masks containing cucumber juice can also be used for skin tightening.