One 11 ounce cucumber (a whole one) that is unpeeled and raw contains just 45 calories, no fat, a reasonable amount of carbs, protein, fiber, Vitamin C, Vitamin K, magnesium, potassium and manganese. Since most people eat about a 1/3 of a cucumber at one time, all nutrition arounds are reduced.
Cucumbers also are made up of about 96% water, meaning they leave you feeling a little fuller. Eating raw cucumbers that are unpeeled are the most nutritious way to enjoy cucumbers. The peel adds additional fiber when you eat it. Overall, a cucumber also contains flavonoids and tannins, which are two compounds that help block free radicals and inflammation.
Like a lot of Vitamin K rich vegetables, you CAN eat too much cucumber in certain situations. If you are on Warfarin or other blood-thinning or anti-clotting medication, you should not suddenly start eating a ton of cucumbers without letting your doctor know.