In winter, colds occur frequently, the body's immunity is weakened, and the resistance is also reduced. Short sunshine time and insufficient sunshine in winter can help the human body to enhance its resistance.
Secondly, the cold air in winter is the most important factor that destroys human resistance. When we breathe cold air, in order to prevent heat loss, the blood vessels in the nose will contract, causing white blood cells to fail to reach the nasal mucosa, killing the virus inhaled by indoor people and causing the virus to invade the human body. At the same time, cold air often damages nasal cavity and respiratory mucosa, which in turn leads to respiratory infection.
Then, in the season of high incidence of influenza in winter, how to improve your immunity through food correctly?
aubergine
The contents of vitamin A and vitamin C in eggplant are low, but other vitamins, fat, phosphorus, iron and polysaccharide are almost close to those in tomato. The content of protein and calcium is three times higher than that of tomatoes. Vitamin E in eggplant can enhance the antioxidant capacity of cell membrane, resist the damage of harmful free radicals to cells, prevent arteriosclerosis and hypertension, promote the secretion of gastric juice and regulate the central nervous system.
tomato
The biggest feature of tomatoes is low calorie and rich in vitamin C, which is of great significance for maintaining the health of human muscles, bone tissues, teeth and gums and the normal operation of immune function.
Tomato is rich in lycopene, which is an antioxidant similar to-carotene and has the function of enhancing human immune function. According to scientific research experiments, lycopene is 100 times higher than vitamin e in improving human immunity, which shows that it has a strong immune enhancement effect, and the effect of lycopene in preventing heart disease is better than that of carrot.
carrot
As a good vegetable for enhancing immunity and preventing cancer, carrot is rich in carotene.
-Carotene can control the development of the most dangerous cancers such as lung cancer and pancreatic cancer, and is a very good lung cancer preventive agent. Eating carrots and foods rich in beta-carotene can greatly reduce the risk of stroke. It was found that women who ate more than 5 servings of carrots per week had a 68% lower risk of stroke than women who ate only 1 serving or less. Carrots are rich in-carotene, which can prevent cholesterol from accumulating on the wall of blood vessels, protect cerebral vessels and reduce the possibility of cerebral vascular rupture.
High calorie food
It is cold in winter, so it is necessary to supplement thermogenic nutrients, such as protein, fat and carbohydrate, to improve the body's tolerance to low temperature. In particular, we should consider supplementing foods rich in protein, such as lean meat, chicken and duck meat, eggs, fish, milk, beans and their products.
Food containing methionine
Methionine can provide a series of methyl groups necessary for cold tolerance by transfer. The cold climate increases the excretion of creatine in human urine and accelerates the metabolism of fat, while methyl is needed to synthesize creatine, fatty acids and phospholipids and release heat in mitochondria. Therefore, we should eat more foods containing methionine in winter, such as animal liver, eggs, lean meat, sesame seeds, sunflower seeds, dairy products, leafy vegetables and so on.
Timely supplement of inorganic salts
Medical research shows that people's fear of cold is closely related to the lack of inorganic salts in diet. Therefore, it is recommended to eat more vegetables with roots in winter, such as carrots, lilies, sweet potatoes, lotus roots, green vegetables and Chinese cabbage, because these foods contain more inorganic salts.
Exercise+nutrition balance
In addition to many changes in diet and nutrition, reasonable exercise can help people get more calories, effectively synthesize vitamin D and improve immunity.
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