A small 2020 randomized control trialTrusted Source investigated the effects of grape seed extract on heart health in obese males. The results suggested that grape seed extract could significantly reduce cardiac output in obese males.
Polyphenols in grapes, such as quercetin and resveratrol, contain antioxidant properties, which may helpTrusted Source to protect against cardiovascular disease and risk factors.
Grape seed oil also contains linoleic acid, which research suggestsTrusted Source supports heart health in animal models.
Grapes containTrusted Source potassium, which can contribute toTrusted Source heart health by helping with blood pressure management and counteracting the effects of sodium. People can speak with a healthcare professional to learn if they are getting enough potassium.Grapes contain polyphenols, which predominantly occur the skin and seeds of grapes. A 2022 paperTrusted Source suggests proanthocyanidins, a type of polyphenol, may protect against the following types of cancer:
- liver
- bladder
- prostate
- cervical
Resveratrol is another type of polyphenol, mainly found in red grape skins. According to a 2023 reviewTrusted Source, resveratrol can block all stages of cancer formation, among other benefits.
Resveratrol is also present in red wine. Some research in the 2023 review suggested red wine may have benefits such as reducing colorectal cancer risk. However, more research, particularly studies involving humans, is necessary to explore this.
According to a 2023 systematic review trusted Source, moderate red wine consumption may have a beneficial effect on certain cancers, such as non-Hodgkin’s lymphoma and breast cancer.
However, the review’s authors highlight that higher levels of red wine consumption may cause adverse effects.
The Dietary Guidelines for AmericansTrusted Source define a moderate intake as up to one drink per day for women and up to two drinks per day for men.
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