China is the largest producer and consumer of apples in the world, accounting for 1/3 of the world's production and consumption. There is an English proverb: an apple a day keeps the doctor away, that is, eating an apple every day keeps you from getting sick. In English, the earliest apples refer not only to apples, but also to fruit food. Therefore, the key to this proverb is to pay attention to the balance of nutrition and advocate that people should have fruit in their diet. However, many studies show that eating apples does have additional health value. Eating apples is healthier for bone protection. There is a special substance in apple-phloridzin, which mainly exists in the peel of apple, and its content is 5~20 times that of pulp. It can prevent osteoporosis in rats in animal experiments. Tumors In animal experiments, apple products have anti-cancer effects.