The cucumber is a member of the botanical family Cucurbitaceae, along with honeydew, cantaloupe, and watermelon. Made up of 95 percent water, cucumbers are naturally low in calories, fat, cholesterol, and sodium.
Their high water content helps ward off dehydration and combat the heat while their refreshing and mild taste appeals to even the pickiest eaters.
This MNT Knowledge Center feature is part of a collection of articles on the health benefits of popular foods.
It provides a nutritional breakdown of the cucumber and an in-depth look at its possible health benefits, how to incorporate more cucumber into your diet, and any potential health risks of consuming cucumber.
Contents of this article:
Health benefits
Nutritional breakdown
How to add cucumber to your diet
Health risks
Fast facts on cucumbers
Here are some key points about cucumbers. More detail and supporting information is in the main article.
Cucumbers are predominantly made of water
Some people use cucumbers to soothe sunburn
Early research shows that a compound found in cucumbers might help fight cancer
Cucumbers contain lignan, which may help fight cardiovascular disease
Cucumber is a versatile foodstuff and can be added to a variety of dishes
Possible health benefits of consuming cucumbers
Consuming fruits and vegetables of all kinds has long been associated with a reduced risk of many adverse health conditions.
Many studies have suggested that increasing consumption of plant foods like cucumber decreases the risk of obesity, diabetes, heart disease, and mortality while promoting a healthy complexion, increased energy, and overall lower weight.
- Hydration
Made mostly of water and full of important electrolytes, cucumber is a perfect food to have on hand during the hot summer months to prevent dehydration. Adding cucumber to water is a great way to increase water consumption as well.
- Skin
When used topically, cucumber has a cooling and soothing effect that decreases swelling, irritation, and inflammation. Cucumber slices can be placed on the eyes to decrease morning puffiness or placed on the skin to alleviate and treat sunburn.
- Bone health
Low intake of vitamin K has been associated with a higher risk for bone fracture. Adequate vitamin K consumption can be achieved by eating a proper intake of fruits and vegetables (one cup of cucumber provides 11 percent of your daily needs) and is important for improving calcium absorption which is essential for optimal bone health.
- Cancer
As a member of the Cucurbitaceae family of plants, cucumbers contain high levels of nutrients known as cucurbitacins, which may have anticancer properties. These properties may prevent cancer cells from proliferating and surviving. Cucumbers contain cucurbitacins A, B, C, D, and E.
Though there are no current anti-cancer therapies that utilize cucurbitacins, there is some preliminary laboratory research that has produced promising results.
Nutritional breakdown of cucumber

Cucumbers have a wealth of health benefits.
According to the USDA National Nutrient Database, 1 cup of raw sliced cucumber with peel (approximately 119 grams) contains:
115 grams of water
16 calories
0.8 grams of protein
0.2 grams of fat
2.9 grams of carbohydrate (including 0.9 grams of fiber and 1.8 grams of sugar)
One cup of cucumber provides the following percentage of your recommended daily allowance:
11 percent of vitamin K
4 percent of vitamin C
4 percent of magnesium
4 percent of potassium
4 percent of manganese
2 percent of vitamin A
2 percent of thiamin
2 percent of riboflavin
2 percent of B6
2 percent of folate
2 percent of pantothenic acid
2 percent of calcium
2 percent of iron
2 percent of phosphorus
2 percent of zinc
2 percent of copper
Cucumbers also contain lignans, which research has shown may decrease the risk of cardiovascular disease as well as several types of cancer.
How to incorporate more cucumber into your diet
Cucumbers can be stored in the refrigerator for up to 1 week. Some cucumbers are treated with a wax coating after they are picked; do not wash these before storing but make sure to wash thoroughly or peel before consuming. Avoid cucumbers with ends that are shriveled or withered.
Cucumbers are best when consumed raw and have a mild taste and cool crunch that makes them a great addition to any salad or sandwich.
Try mixing sliced cucumbers, tomatoes, and feta cheese for a Greek-style side dish
Jazz up your water by adding mint leaves and cucumber for a refreshing treat
Slice cucumbers into thick slices and dip them in your favorite hummus
Potential health risks of consuming cucumber
Each year, the Environmental Working Groupproduces a list of fruits and vegetables with the highest levels of pesticide residue, known as the Dirty Dozen.
Cucumbers are high on the pesticide residue list. The EWG suggest that you buy organic to ensure a lower risk of pesticide exposure. If you can't afford organic, don't fret; the nutritional benefit of eating conventionally grown (non-organic) produce far outweighs the risk of not eating produce at all.
It is the total diet or overall eating pattern that is most important in disease prevention and achieving good health. It is better to eat a diet with a variety than to concentrate on individual foods as the key to good health.
Written by Megan Ware RDN LD