Why Grapes Are Good For You

Do you know how valuable grapes are?

The following post is inspired by an article Medically reviewed by Jerlyn Jones, MS MPA RDN LD CLT, Nutrition — Written by Ariane Lang, BSc, MBA and Melissa Groves — Updated on May 12, 2025

Grapes offer health benefits, primarily due to their high nutrient and antioxidant content. They may benefit the eyes, heart, bones, and more.

People have cultivated grapes for thousands of years, including several ancient civilizations that revered them for their use in wine making. Grapes also make a quick and delicious snack you can enjoy at home or on the go.

You may find grapes in various colors, including green, red, black, yellow, and pink. They come in multiple forms, from raisins to jellies to juice. Seeded and seedless varieties also exist.

Grapes offer many potential health benefits, primarily due to their high nutrient and antioxidant content.

Here are the top 16 health benefits of grapes.

Packed with nutrients
Grapes are high in several important nutrients. Just 1 cup (151 grams) of red or green grapes provides the following:
•Calories: 104
•Carbs: 27
•grams Protein: 1 gram
•Fat: 0.2 grams
•Fiber: 1.4 grams
•Copper: 21% of the daily value (DV)
•Vitamin K: 18% of the DV
•Thiamine (vitamin B1): 9% of the DV
•Riboflavin (vitamin B2): 8% of the DV
•Vitamin B6: 8% of the DV
•Potassium: 6% of the DV
•Vitamin C: 5% of the DV
•Manganese: 5% of the DV
•Vitamin E: 2% of the DV

Grapes are a rich source of copper and vitamin K. Copper is an essential mineral involved in energy production, while vitamin K is vital for blood clotting and healthy bones.

Grapes also provide good amounts of B vitamins, such as thiamine, riboflavin, and B6. Both thiamine and riboflavin are needed for growth and development, while B6 is mainly required for protein metabolism.

MORE BENEFITS OF GRAPES

May aid heart health
Grapes may support heart health in several ways.

May help lower blood pressure
One cup (151 grams) of grapes contains 6% of the DV for potassium, a mineral necessary for maintaining healthy blood pressure levels.

Evidence shows that potassium helps lower blood pressure primarily by dilating the arteries and veins.

It may also help excrete sodium and prevent the narrowing of arteries and veins that would otherwise increase blood pressure.

**However,** a review of 32 studies determined that potassium intakes that are too low or too high may lead to high blood pressure. Researchers advised sticking to the current daily intake recommendation of 4.7 grams.

May help reduce cholesterol
Compounds found in grapes may help protect against high cholesterol levels by decreasing cholesterol absorption.

In an 8-week study published in 2015 in 69 people with high cholesterol, eating 3 cups (500 grams) of red grapes daily helped lower total and LDL (bad) cholesterol levels.
**However,** white grapes didn’t have the same effect.

Additionally, diets high in resveratrol, an antioxidant in grapes, may help decrease cholesterol levels.

High in antioxidants
Antioxidants are compounds that help repair the damage to your cells caused by free radicals, harmful molecules that cause oxidative stress. Oxidative stress is associated with several chronic health conditions, including diabetes, cancer, and heart disease.

Grapes are rich in several powerful antioxidants. The highest concentration of antioxidants is found in the skin and seeds. However, multiple factors may affectTrusted Source their concentration, including grape variety, maturity, post-harvest storage, and environmental factors.

These beneficial compounds remain present even after fermentation, which is why wine is also an antioxidant source.

Some grape varieties contain a higher content of anthocyanins, a class of antioxidant flavonoids that give these fruits orange, red, blue, pink, and purple colors. Human and animal studies indicate that anthocyanins may help prevent or treat brain and heart diseases.

Other important antioxidants in this fruit are resveratrol and quercetin, which may help protect against heart disease, high blood sugar levels, and cancer.

Grapes also contain vitamin C, beta carotene, lutein, and ellagic acid, which are also powerful antioxidants.

The antioxidants in grapes may protect against certain types of cancer.
Resveratrol may help by reducing inflammation, acting as an antioxidant, and blocking the growth and spread of cancer cells in your body.

Grapes also contain quercetin, anthocyanin, and catechin antioxidants — all of which may have cancer-fighting effects.

Test-tube and animal studies show that grape extracts may block the growth and spread of human colon, prostate, and breast cancer cells.

Additionally, a 2-week study published in 2015 in 30 people found that those over 50 who ate 0.3–1 pound (150–450 grams) of grapes daily experienced decreased markers of colon cancer risk.

While more human studies are needed, a diet high in antioxidant-rich foods like grapes has been linked to lower cancer risk.

May protect against diabetes and lower blood sugar levels.
The glycemic index (GI) rating, a measure of how quickly a food raises your blood sugar, grapes range from 49 to 59, depending on variety.

The definition of low GI variesTrusted Source by source, with some considering under 55 low and others considering under 50 as low.

Grapes’ GI score may range from low to medium, in which case they may raise your blood sugar levels at a slow or moderate pace, but won’t necessarily cause it to increase rapidly.

However, eating too much of a low GI food can have the same effect on your blood sugar levels as eating a high GI food. So, it’s best to eat grapes in moderation.

Compounds found in grapes may also help improve markers of insulin response.
In a review of 29 studies in 1,297 adults, grapes and grape supplements significantly decreased what’s called homeostatic model assessment of insulin resistance (HOMA-IR), a measure of insulin resistance.

In particular, the compound resveratrol may improve your body’s ability to use insulin by:
•decreasing insulin resistance
•increasing insulin sensitivity
•protecting your pancreas’s beta cells, which produce insulin
•improving insulin production
•helping the body maintain a stable and consistent level of blood glucose

Managing your blood sugar levels over time can reduce your risk of diabetes and help prevent diabetes-related complications.

Grapes are a good fruit because of its antioxidant effect, and it has a low glycemic index which decreases blood sugar.

Finally, may block the growth and spread of human colon, prostate, and breast cancer cells.

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