The so-called "energetic diet" originally refers to the health care method of adopting fresh, unprocessed, pollution-free heating, returning to nature and eating natural plants. Advocate drinking wheat straw juice, refined soup, eating lettuce buds, eating whole grain brown rice and whole wheat products, and completely ban oil, salt, sugar, animal protein and all processed products. In Taiwan Province Province, this diet from the United States was initially popular only among a group of cancer patients. However, as the concept of diet is constantly revised to Chinese (supplemented by cooked food) and gradually localized, Taiwan Province-style energetic diet is developed, so more and more people who pursue health also adopt this diet. The concept of active diet is healthy, and from the perspective of modern medicine, this diet is beneficial to prevent cancer. "Lai, director of Taiwan Province Cancer Clinical Research Cooperation Organization of National Institutes of Health and executive director of Taiwan Province Cancer Foundation, holds a positive view on energetic diet. Vigorous diet emphasizes eating more fruits and vegetables and reducing the intake of meat, eggs and milk, which basically conforms to the current dietary concept of preventing cancer, because more and more studies show that phytochemicals in fruits and vegetables (such as β-carotene, vitamins C and E) can be used to fight diseases, especially "cancer prevention". Epidemiological studies have proved that people who usually eat more fruits and vegetables have a lower incidence of cancer. Vitamins A and C contained in fresh fruits and vegetables in food are the best antioxidants, which can neutralize carcinogens in food and eliminate the damage of free radicals to cells. For example, vitamin A can induce precancerous cells or cancer cells to turn to benign differentiation and avoid the occurrence of cancer; Vitamin c can inhibit the formation of nitrosamines, a carcinogen in gastrointestinal tract. Nutrition research also pointed out that the best food to prevent cancer comes from plants.