Grapefruits are a popular component of many diets and weight loss programs — and for good reason.
Besides being low in calories, grapefruits have a high water and fiber content — both of which can be beneficial for weight loss (19, 20).
One study in 91 obese adults showed that eating half a grapefruit before meals resulted in significant weight loss, compared to a control group.
In the 12-week study, participants who ate grapefruit lost an average of 3.5 pounds (1.6 kg) — about five times more than the control group (21).
In an 85-person study, consuming grapefruit or grapefruit juice before a meal for 12 weeks and pairing it with a low-calorie diet, decreased body fat mass by 1.1%, increased weight loss by 7.1% and reduced calorie intake by 20–29% (22).
Fresh grapefruit slices make a great addition to a well-rounded breakfast. You can also add grapefruit to parfaits, smoothies or fruit salads.
However, if you are taking any drugs make sure to consult your doctor or pharmacist before eating grapefruit. Certain drugs may interact with grapefruit, potentially causing some adverse effects (23).
Grapefruits are low in calories, high in water and rich in fiber. Studies show that they may increase weight loss and reduce calorie intake and body fat.