Apples, deciduous trees, oval leaves, flowers with a flush white. The fruit is round, sweet or slightly sour. It is a common fruit, rich in nutrients, and has therapeutic and auxiliary therapeutic functions. Apple originated in Europe, Central Asia, West Asia, and Turkey. It was introduced to China in the 19th century. China is the world’s largest apple producer and is cultivated in the Northeast, North China, East China, Northwest China, Sichuan and Yunnan.
Apple, belonging to Rosaceae, is not only the most important fruit in China, but also the most widely grown fruit in the world. Its taste is sour and sweet and nutritious. According to the determination, per 100 grams of apple contains fructose 6.5 ~ 11.2 grams, 2.5 ~ 3.5 grams of glucose, 1.0 ~ 5.2 grams of sucrose; also contains trace elements zinc, calcium, phosphorus, iron, potassium and vitamin B1, vitamin B2, vitamin C and carrots Prime and so on. The United States spreads a saying: "Each one meal eats an apple, do not need to ask the doctor." Although these words are somewhat exaggerated, Apple's nutritional and medicinal value can be seen here. Because the nutrition contained in apple is comprehensive and easy to be digested and absorbed by the body, it is very suitable for infants, the elderly, and the patients.
Apple has the reputation of "wisdom fruit" and "memory fruit." People have long found that eating more apples has the effect of enhancing memory and improving intelligence. Apple is not only rich in essential nutrients in the brain such as sugar, vitamins and minerals, but more importantly, it is rich in zinc. According to research, zinc is a component of many important enzymes in the human body and is a key element in promoting growth and development. Zinc is widely involved in the metabolism of proteins, fats, and sugars in the body through enzymes. Zinc is also an essential element of nucleic acids and proteins that are closely related to memory. Zinc deficiency can make the hippocampus in the edge of the cerebral cortex hypoplastic, affecting memory, experiments also proved that reducing the zinc in food, young children's memory and learning ability is seriously impeded. Zinc is also closely related to the production of antibodies and improving human immunity.