The concept of “fire” or “fire” is a folk concept. Fire refers to dry mouth and tongue and other symptoms, and grapefruit can not lead to fire, nor fire, but can provide the body with carbohydrates and other nutrients. Every 100 grams of grapefruit contains 33 calories, of which 7.8 grams of carbohydrates, dietary fiber 1.2 grams, 0.7 grams of protein, 0.3 grams of fat, but also rich in vitamin C and minerals. Moderate consumption of grapefruit can provide the body with various types of nutrients and supplemental water. Grapefruit is rich in dietary fiber, conducive to intestinal peristalsis. Constipation patients can increase intake in moderation. Grapefruit belongs to the food, will not directly lead to disease, and can not treat disease, so there is no fire or fire said. Consumption of grapefruit should not be excessive, otherwise it is easy to affect the intake of other nutrients, resulting in unbalanced nutritional intake. Diabetic patients need to appropriately limit the intake of such fruits as grapefruit. Those who are allergic to grapefruit should not consume grapefruit.