As a fruit, guavas can provide the body with carbohydrates, vitamins and other nutrients when eaten in moderation, but they do not have the same efficacy and effect as drugs. Each 100 grams of guavas contains 68 calories, of which 2.5 grams of protein, 14.32 grams of carbohydrates, 0.95 grams of fat, vitamin C228.3 milligrams, 18 milligrams of calcium. Guavas are rich in nutrients and moderate consumption of guavas helps to maintain normal life activities to a certain extent. However, guavas have no medicinal properties and cannot cure or prevent diseases. It is important to note that guavas should not be consumed in excess, and those who are allergic to guavas should not consume guavas.