Know2eat

Red grapes

Vitis vinifera

Also known as Table grapes, Red globe, Crimson seedless

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The fruit of the common grapevine, eaten fresh, dried as raisins or fermented into wine. Red and black varieties carry anthocyanins in the skin that green varieties lack.

CirculationHeart HealthBrain & Cognitive Health

Potential health benefits

Best supported: Limited

Ordered by how well the human research supports them — strongest first. A rating describes the state of the evidence, not how impressive the food is. How we rate evidence.

Endothelial function

Circulation
Limited evidence

Some trials of grape products report improved flow-mediated dilation, most often using concentrated grape juice or grape seed extract rather than whole fruit. Results across trials are inconsistent.

Limited evidence. Early human work, or mostly lab and animal research.

3 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Healthy blood pressure

Heart Health
Limited evidence

Pooled analyses of grape polyphenol products report small and inconsistent blood-pressure reductions. Most of the underlying trials use extracts, so they say little about eating table grapes.

Limited evidence. Early human work, or mostly lab and animal research.

1 source

Deep research mode adds each paper’s own conclusion and stated limitations.

Cognitive function

Brain & Cognitive Health
Insufficient evidence

Grapes and grape-derived resveratrol are widely promoted for memory and brain ageing. The human trials are few, small, mostly use extracts, and do not add up to a dependable finding.

Insufficient evidence. Not enough human research to say anything useful yet.

4 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Ask about Red grapes

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Answers are written only from the entries on this page — the same nutrients, compounds, claims and citations you can read above. Nothing is added from outside the database, and every answer lists what it was built from.

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Key nutrients

Nutrient content per 100 grams
NutrientAmount% DV
Macronutrients
Calories69 kcal3%
Protein0.72 g1%
Total fat0.16 g0%
Carbohydrate18.1 g7%
Fibre0.9 g3%
Total sugars15.5 g—
Water80.5 g—
Fats
Saturated fat0.054 g0%
Monounsaturated fat0.0070 g—
Polyunsaturated fat0.048 g—
Cholesterol0 mg0%
EPA (omega-3)0 g—
DHA (omega-3)0 g—
DPA (omega-3)0 g—
Linoleic acid (omega-6)0.037 g—
Vitamins
Vitamin A3 µg0%
Vitamin C3.2 mg4%
Vitamin D0 µg0%
Vitamin E0.19 mg1%
Vitamin K14.6 µg12%
Thiamin (B1)0.069 mg6%
Riboflavin (B2)0.07 mg5%
Niacin (B3)0.188 mg1%
Pantothenic acid (B5)0.05 mg1%
Vitamin B60.086 mg5%
Folate2 µg1%
Vitamin B120 µg0%
Choline5.6 mg1%
Minerals
Calcium10 mg1%
Iron0.36 mg2%
Magnesium7 mg2%
Phosphorus20 mg2%
Potassium191 mg4%
Sodium2 mg0%
Zinc0.07 mg1%
Copper0.127 mg14%
Manganese0.071 mg3%
Selenium0.1 µg0%
Other measured compounds
Beta-carotene39 µg—
Alpha-carotene1 µg—
Lycopene0 µg—
Lutein + zeaxanthin72 µg—
Caffeine0 mg—
Ash0.48 g—

Nutrient values are per 100 g of the USDA reference entry named on this page and vary with variety, growing conditions, storage and preparation.

Source record: Grapes, red or green (European type, such as Thompson seedless), raw (USDA FoodData Central, FDC ID 174683).

% DV uses the FDA Daily Values for adults and children aged 4 and over. A dash means no Daily Value has been established for that nutrient.

Bioactive compounds

Compounds present in meaningful amounts. Presence is banded rather than quantified, because whole-food levels vary enormously with variety, growing conditions, storage and preparation.

How preparation changes things

Only effects with real support are listed. If a preparation method is missing, it is because nothing dependable is documented — not because it makes no difference.

  • driedIncreases sugar and polyphenol concentration

    Drying grapes into raisins removes most of the water, concentrating both sugars and polyphenols several-fold by weight. It also makes the fruit far stickier, which is relevant to dental decay.

Things to know

Allergies, interactions and intake concerns. Every food gets this section — a reference where everything is uniformly good is not a reference.

  • Worth knowing

    Choking hazard for young children

    Whole grapes are among the most common causes of fatal food choking in children under five, because they are exactly the right size and shape to seal a small airway. Halving or quartering them lengthways removes the hazard.

  • Too much

    Easy to overconsume

    Grapes are small, sweet and require no preparation, so portions escalate without much notice. A large bunch is a substantial carbohydrate serving, which matters mostly for people managing diabetes.

  • Worth knowing

    Resveratrol content is very low

    Almost all resveratrol research uses concentrated supplements at doses that would require an implausible quantity of grapes or wine. Health claims made for resveratrol should not be read across to eating grapes.