Someone asked on the Internet whether it is necessary to peel the baked sweet potato. In fact, the sweet potato skin can be eaten, but the sweet potato skin will be stained with a lot of soil and dust. As long as it is cleaned, it can be eaten, and the sweet potato skin has rich nutritional value, such as the following:
1. Sweet potato peel has anticancer effect
The most anticancer nutrient in diet is & beta- Carotene (precursor of vitamin A), vitamin C and folic acid are abundant in sweet potato. A small sweet potato (about 2 double) can provide twice the amount of vitamin a required by the human body every day, one third of the amount of vitamin C required every day and about 50 micrograms of folic acid; The content of dietary fiber is higher than that of a bowl of oatmeal porridge
β- The antioxidant effects of carotene and vitamin C help to resist the damage of oxidative stress to genetic material deoxyribonucleic acid (DNA) and play a certain anti-cancer role
Eating sweet potato often helps to maintain the normal folate level of the human body. Low folate content in the body will increase the risk of cancer. The high content of dietary fiber in sweet potato can promote gastrointestinal peristalsis, prevent constipation and colorectal cancer
2. Sweet potato peel is good for the heart
Sweet potato is rich in potassium and & beta- Carotene, folic acid, vitamin C and vitamin B6 are all helpful to prevent cardiovascular disease. Potassium helps to balance the fluid and electrolyte of human cells, maintain normal blood pressure and heart function- Carotene and vitamin C can resist lipid oxidation and prevent atherosclerosis. Folic acid and vitamin B6 supplementation can help to reduce the level of homocysteine in blood, which can damage arteries and vessels and is an independent risk factor of cardiovascular disease
3. Prevention of emphysema with sweet potato peel
An animal experiment at the University of Kansas found that smoking rats have low vitamin A levels and are prone to emphysema; The incidence rate of emphysema in smoking rats with vitamin A rich food was significantly reduced. Why do some long-term smokers live to what is more than 90 years old, but no emphysema is related to the rich vitamin A in their diet. The researchers suggest that smokers or passive smokers should eat foods rich in vitamin A such as sweet potatoes to prevent emphysema every day.