Sweet potato is not only healthy, but also helps to maintain skin and enhance resistance! Skin occupies a large area of the human body and is also the first line of defense against external germs. Having healthy skin can reduce the chances of bacteria and viruses invading inward, and vitamin A is an important nutrient for strong skin.
Besides carrots, delicious and cheap sweet potatoes are also a good choice for foods rich in vitamin A! Every100g of sweet potato (red meat) contains about 10490 international units (IU), which is quite rich, not only not far from that of small tomato (red), but also more than 6 times that of large tomato (red).
2. tea
A Harvard study pointed out that drinking five cups of black tea every day for two weeks, the antiviral interferon in the blood is 10 times that of the average person. Theanine, an amino acid in tea, helps to enhance immunity and is rich in black tea and green tea. Even decaffeinated black tea and green tea contain theanine.
3. seafood
Shelled seafood such as oysters, lobsters, crabs and clams are rich in mineral selenium, which can help white blood cells make cytokines and help clear the cold virus in the body. In addition, salmon, tuna, mackerel, saury and other fish rich in omega-3 fatty acids can reduce body inflammation and protect the lungs from the threat of colds and respiratory infections.
4. Beef
Zinc is an important mineral to promote resistance, which can promote the growth and activation of white blood cells. As long as there is a slight deficiency, it is easy to increase the probability of infection. Beef is rich in zinc, and moderate intake is beneficial to improve resistance.
5. Oats and Barley
Oat is rich in β-glucan, which is an antibacterial and antioxidant dietary fiber, which helps to promote immunity, accelerate wound healing and help antibiotics play a better role.
6. Yogurt
Probiotics in yogurt can clean intestines and reduce pathogenic bacteria. In addition, the intestine is the base camp of human immunity. With a healthy intestine, you can have strong resistance! A Swedish study conducted an 80-day experiment on 18 1 factory employees, and made some people drink auxiliary drinks containing Lactobacillus lodestar every day. This probiotic helps to promote the function of white blood cells. It was found that compared with non-drinkers, they were sick for 33% fewer days than others.
7. Chicken soup
When the chicken is cooked, it will release an amino acid, which can relieve mucus, thus helping to relieve the initial cold. When cooking soup, it is recommended to add some garlic or onions to cook together, which will enhance resistance!
8.mushrooms
Many studies have shown that mushrooms can increase the growth and activity of white blood cells and enhance the human body's combat effectiveness against germs. In addition, mushrooms are rich in nutrients such as selenium, vitamin B2 and nicotinic acid. Moreover, the study found that if the selenium content in the body is too low, the risk of getting a cold worse will easily increase. In addition, vitamin B2 and nicotinic acid can maintain immunity.
9.garlic
Garlic is rich in allicin, which can fight infection and bacteria. In addition, garlic itself is a beneficial bacteria, which can promote the growth of beneficial bacteria in the intestine, maintain the health of the intestine and increase immunity. A study in Britain conducted a study of 146 subjects for 12 weeks. During this period, some people ate garlic extract, while others ate placebo. Finally, it is found that the probability of catching a cold of people who eat garlic is reduced by 2/3.