Grapefruit are most well known for their diet-friendly, low-calorie qualities, but the citrus fruit is also a great source of vitamins and nutrients.
A relative newcomer among citrus fruits, the grapefruit wasn't discovered until the 18th century in Barbados. Though its origins were a mystery for years, many historians agree that it is a natural hybrid of the sweet orange and pomelo. As for its curious name, a Jamaican farmer named the large orbs “grapefruit” for the way they grow in grape-like clusters on the trees.
As well as being a good source of dietary fiber (8 percent Daily Value) and potassium (5 percent DV), half a medium grapefruit provides 64 percent DV of vitamin C and 28 percent DV of vitamin A; it also contains the health protective plant chemicals naringenin, limonin, lycopene (in pink and red varieties) and beta-carotene.
Long associated with weight loss, grapefruit studies have shown mixed results. A recent review of studies on the effectiveness of grapefruit consumption on overweight and obese individuals showed no significant difference between those eating grapefruit and those who did not. However, the analysis, published in a 2015 issue of Critical Reviews in Food Science and Nutrition, showed a significant decrease in blood pressure.
Regular grapefruit juice consumption also benefits arterial stiffness in middle-aged, post-menopausal women (American Journal of Clinical Nutrition, 2015), and adult consumption of grapefruit is associated with improved diet quality, including higher nutrient intakes of vitamin C, magnesium, potassium and dietary fiber (Food and Nutrition Research, 2014).
Grapefruit is available in markets year-round, but its peak season is January through June.
