Three-year-old baby can eat grapefruit, but can not eat more, to eat the right amount, such as baby allergies, do not eat. Pomelo as a fruit, containing nutrients, can supplement the baby’s physiological metabolism required nutrients. But the baby’s gastrointestinal development is not perfect, digestive function is weak, diet too much grapefruit, it is easy to cause indigestion. Pomelo contains certain carbohydrates, energy, purine, lysine, calcium, methionine fat, protein, potassium, phosphorus, magnesium, and vitamin C and vitamin A and so on. The content of vitamin C ranks high in its category and can be used as a food source for vitamin C supplementation. Therefore grapefruit has some nutritional value. Baby growth and development of the nutrients needed is very rich, appropriate and moderate to eat grapefruit at the same time, pay attention to with other vegetables and fruits to ensure balanced nutrition, such as baby allergies, do not eat.