While low in calories and high in fibre, eating grapefruit is unlikely to deliver the dramatic weight loss touted in some fad diets however, there is some evidence to suggest that consuming grapefruit may be of some assistance. Human studies have demonstrated the beneficial role grapefruit, and specifically red grapefruit, may play in helping to improve cholesterol levels, particularly in those suffering with atherosclerosis. Grapefruit is rich in potassium and fibre, as well as protective antioxidants which may help manage blood pressure and cholesterol levels. However, more research is needed to understand exactly why this is. In 2012, the American Heart Association published a report that suggested that a diet high in certain flavonoids, compounds found in citrus fruits including grapefruit, may lower a woman’s risk of stroke. Grapefruit is also a useful source of lycopene, which is associated with a reduced risk of cancer.
In particular, they’re a good source of beta-carotene, which is converted in the body to vitamin A, and is thought to reduce the risk of chronic conditions including macular degeneration.
This means they help protect cells from the potential damage caused by unstable molecules called free radicals. Grapefruit provides a number of beneficial and protective nutrients and plant compounds which have antioxidant properties.