What are the health benefits of grapes?
Grapes contain powerful antioxidants known as polyphenols. These are thought to have anti-inflammatory and antioxidant properties. One of these is resveratrol. It is found in the skins of red grapes.
Laboratory studies have suggested that resveratrol may be able to slow or prevent the growth of tumors in lymph, liver, stomach, breast, colon, skin cancer, and leukemia.
Grapes contain fiber and potassium, both of which support heart health. The American Heart Association (AHA) recommends increasing potassium intake while decreasing sodium consumption to improve blood pressure and cardiovascular health.
A study of data for 12,267 adults in the United States has shown that the more sodium people consume in relation to their potassium intake, the higher the risk of all-cause mortality.
A high potassium intake has been associated with a reduced risk of stroke, protection against loss of muscle mass, and preservation of bone mineral density.
Grapes contain water and fiber. These can help people stay hydrated, keep bowel movements regular, and reduce the risk of constipation.
Because of the anti-inflammatory effects of quercetin, some suggest that consuming grapes may help to alleviate symptoms of allergies, including runny nose, watery eyes, and hives.
However, no human studies have been done to prove this theory.
In 2013, results of a study published in the BMJ suggested that certain fruits, but not juices, may reduce the risk of type 2 diabetes in adults.
Increasing potassium intake may help reduce the negative effects of too much sodium in the diet.
Grapes have a high potassium content. This suggests they can help reduce the effects of sodium in people with high blood pressure.
Grapes contain the antioxidants lutein and zeaxanthin, which can help maintain eye health. They are thought to neutralize unstable molecules known as free radicals. In this way, they may reduce oxidative stress and damage to the retina, and help prevent cataracts and other conditions.
Results of an in vitro study published in the journal Dermatology and Therapy claims that resveratrol could help treat acne, especially if used with benzoyl peroxide as a topical treatment.