The best way to eat apples is with the skin on
"An apple a day keeps the doctor away" is a well-known health proverb. However, the best way to eat an apple is to eat it with the skin. According to the latest issue of Nature Medicine, American researchers have found that dasatinib (a leukemia drug) and quercetin (a type of quercetin from apple peel)extractThe combination can extend the lifespan of elderly mice by 36%.
Senescent cells usually appear in the body in their 60s, and earlier in obese people or people with chronic diseases. These abnormal cells are in a state of decline, but they are unwilling to die. Some believe that senescent cells themselves catalyze the aging process.
A team led by James Kirkland of the Mayo Clinic in the US has shown that this is indeed the case. When researchers injected small amounts of senescent cells into six-month-old mice, their speed, endurance and strength dropped by 20 to 50 per cent in a matter of weeks - roughly the level of a typical two-year-old mouse.
To block the effects of senescent cells, the research team chose a combination of dasatinib and quercetin because both interfere with the way senescent cells avoid death. When the research team administered the combination drug to young mice that had aged due to the injection of senescent cells, the mice regained 50% to 100% of their lost physical ability within two weeks.
When the research team administered the drug to older mice aged 24 to 27 months, the mice improved their speed, endurance, and strength by 30 to 100 percent, and their remaining lifespan was 36 percent longer than that of untreated older mice.
The nutritional value of apple peel
Apple is ranked first among the 30 kinds of anti-cancer fruits and vegetables promoted by the American Cancer Society because it is rich in vitamin C, vitamin E and beta carotene, which can effectively prevent heart disease and cancer. In addition, the peel of apples is rich in oxidizing substances. In addition, there is a special "pectin" component in apples, which is a water-soluble fiber that exists in the layer between the pulp and the peel. The main function is to help the body expel cholesterol to the body, in order to achieve the purpose of lowering cholesterol.
The total polyphenol content in apple peel was 307mg/100g, the total flavonoids were 184mg/100g, and the proanthocyanidins were 105mg/100g, which were beyond the reach of the pulp. Studies have found that the polyphenols extracted from apples have quite significant anti-radiation effects, which can delay the survival of irradiated animals; it also promotes the excretion of lead pollution in animals, significantly reducing the lead content in the liver, bones and blood of lead-poisoned mice.
It can be seen that although the apple peel contains slightly more lead than the pulp, it also has a powerful ability to help eliminate lead poisoning. Compared with the two, the benefits and harm are not so terrible.
What are the benefits of eating apple peels?
Rich in dietary fiber
Dietary fiber plays a crucial role in promoting good digestion and excretion of solid waste. Eating an apple during constipation works well. The middle skin of an apple contains more than twice as much dietary fiber as the meat. The skin of a medium-sized apple contains 4.4 grams of dietary fiber, while the pulp contains only 2.1 grams. If the apple is peeled and eaten, the intake of dietary fiber will be greatly reduced.
Rich in vitamins
The skin alone in an apple contains about one-third less vitamin C and vitamin A than the meat. AndvitaminEspecially the important people of vitamin C, don't you eat the skin?
Protect the lungs
Apple peels contain the natural antioxidant quercetin, which can protect the lungs from pollutants. Especially now that the smog is getting worse, apple peels are a health food to improve lung function.
It can protect memory
In addition, the antioxidant quercetin helps prevent brain tissue damage in degenerative diseases, thus protecting memory.
Has anti-cancer effect
Studies have shown that apple peel contains more than a dozen triterpene compounds that can inhibit the growth of cancer cells such as liver, colon, or breast cancer, and can also kill cancer cells.
Helps lose weight
Apple peels are high in dietary fiber and vitamins, and apple peels can increase satiety, which can effectively promote digestion and resist hunger for people who lose weight. It is recommended to eat apples every day instead of dinner, which can relieve obesity very well.
Precautions for eating apple peels
1. You may wish to give priority to bagging apples. The skin of this apple is clean and uniform, and it is less affected by polluting gases, pesticide spraying, etc.
2. Apples are ripe in autumn, and fresh apples were sold at that time without preservative treatment, making it safer to eat the peel. The most worrying thing is foreign apples that have traveled across the ocean, because they must be preserved fresh, and waxing of foreign fruits is more common.
3. Fresh apples naturally have a layer of fruit wax on the surface, but there is also a thin layer of fruit powder, which is not bright. After the apple is harvested, in order to improve the value of the product and delay the water loss of the apple, a waxing machine is often used for polishing, and there may be problems such as preservative treatment. Therefore, when you see apples with a particularly beautiful and shiny surface, especially out-of-season apples, it is best to peel them before eating.
4. It is best to choose apples that are pollution-free, green, and organic certified. Such apples will have much less heavy metal and pesticide residues, even if they are not equal to zero, they will have less residues than ordinary apple peels, making it more secure to eat peels.
Which apples should be peeled and eaten?
Apple is ranked first among the 30 kinds of anti-cancer fruits and vegetables promoted by the American Cancer Society because it is rich in vitamin C, vitamin E and beta carotene, which can effectively prevent heart disease and cancer. In addition, the peel of apples is rich in oxidizing substances. In addition, there is a special "pectin" component in apples, which is a water-soluble fiber that exists in the layer between the pulp and the peel. The main function is to help the body expel cholesterol to the body to reduce cholesterol. However, some apples are best eaten after peeling.
Pesticide apple
Farmers add pesticides in the process of growing fruits and vegetables, so it is recommended that consumers wash them with running water for more than 15 minutes before eating, because pesticides are water-soluble, and most pesticides can be washed away through running water. However, because it is not clear which kind the industry is adding, it is recommended to peel them and eat them.
Waxed apple
Manufacturers usually add a layer of fruit wax, mainly to increase the gloss of the appearance and attract consumers to buy, but these fruit waxes are not natural substances, but chemical substances, such as worm wax, oxidized polyethylene, etc. Although these are legal in Taiwan, the metabolite of oxidized polyethylene, 1,4-oxynitrogen, is converted into nitrous acid in the body, which poses a risk of carcinogenesis.
