What is the grapefruit diet?

Low carb & cal plan. The grapefruit diet is a low carb, 800-1000 calorie plan that claims chemicals in the grapefruits together with protein will cause an increase in fat burning. It promises a 10# weight loss in 12 days. Although grapefruit has no magical fat burning properties, it is high in fiber decreasing appetite and low in calories. Speak to dr. Before starting due to medication interaction with grapefruit.