Cucumber are known to contain lignins with reduced risk of several cancer types, including breast, ovarian, uterine and prostate cancers. Cucumbers are 95 percent water, which keeps the body hydrated. Cucumbers have been used for ages in daily skin care regimens and help stimulate hair growth. Health benefits of Cucumber It is one of the very low calorie vegetables; provide just 15 calories per 100 g. It contains no saturated fats or cholesterol. Cucumber peel is a good source of dietary fiber that helps reduce constipation, and offers some protection against colon cancers by eliminating toxic compounds from the gut. It is a very good source of potassium, an important intracellular electrolyte. 100 g of cucumber provides 147 mg of potassium but only 2 mg of sodium. Potassium is a heart friendly electrolyte helps bring a reduction in total blood pressure and heart rates by countering effects of sodium.