The weight of an apple ranges from 150 grams to 400 grams. There is a wide variety of apples, with different varieties weighing different amounts. A smaller apple is around 150 and a larger apple can be up to 400 grams. Looking at the calories of an apple needs to be based not only on the number of apples, but also on the exact weight of the apple. Each 100 grams of apple provides 52 calories and contains 3.5 grams of carbohydrates, 1.2 grams of dietary fiber, 0.2 grams of protein, 0.2 grams of fat, 4 milligrams of calcium, and 0.6 milligrams of iron. Moderate consumption of apples can provide the body with a variety of nutrients, which helps to maintain the normal functioning of the body’s physiological functions and is beneficial to the body. Generally speaking, healthy adults can eat about 200 to 350 grams of fruit a day, so it is recommended that an apple a day is good for health. It is not recommended to consume a single fruit such as apple for a long period of time and in large quantities, in order to prevent the reduction of other nutrient intake, which may lead to nutritional imbalance and other problems. Diabetics need to reduce their fruit intake appropriately to keep their blood sugar stable.