rich in nutrients
grapefruit are nutrient-rich foods that are low in calories as well. Half a medium size grapefruit contains 52 calories, 13 grams of carbohydrate and 1 gram of protein. Half a grapefruit gives 64 percent of their vitamin C a day, 28 percent of vitamin A, 2 percent calcium and 2 percent magnesium. Also they contain vitamin E, thiamine, riboflavin, niacin, folic acid, pantothenic acid, potassium, phosphorus, manganese, zinc and copper. They are rich in antioxidants lycopene and beta-carotene and phytonutrients limonoides and naringenin.
lowers blood pressure and improves heart health
nutrients like fiber, potassium, lycopene, vitamin C and choline are essential for heart health. Research has found that red fresh grapefruit lowers levels of blood lipids, particularly triglycerides and bad LDL cholesterol. Another study found that a diet rich in potassium (found in abundance in grapefruit) reduces the risk of death from ischemic heart disease, reduces the risk of stroke and lowers blood pressure. The grapefruit pectin progression of atherosclerosis slows.
The presence of antioxidants such as vitamin C, lycopene and beta-carotene has been shown by research to reduce the risk of some cancers. These antioxidants prevent cell damage caused by free radicals. Limonoides called phytonutrients prevent tumor formation by the formation of glutathione S-transferase, a detoxifying enzyme. Limonoids fight cancers of the mouth, skin, lung, breast, stomach and colon. Grapefruit pulp glucarate contains compounds that help prevent breast cancer.