The weather is hot and cold, and people with bad health are especially prone to catch cold. A cold is not a serious illness, but it cannot be ignored. There are many reasons for catching a cold. It is nothing more than a lack of rest and a decline in resistance. Well, prevention of colds is also in sight, especially the current "unstable" weather. Eat more "anti-induction dishes" and do a variety of measures to prevent colds, it is still very helpful! First, dark green and orange vegetables increase vitamin A Experts said that orange-yellow vegetables are rich in carotenoids and can be converted into vitamin A in the human body. Vitamin A can enhance the function of human epithelial cells and can produce resistance to cold viruses. It can strengthen the mucous membranes of the throat and lungs and keep them normal. The metabolism. Folate, which is particularly rich in green vegetables, is a factor that is required for the synthesis of immune substances, and a large amount of flavonoids can work together with vitamin C to help maintain resistance. Can promote the synthesis of antiviral substances such as interferon, as well as high certain immune indicators. Tips: broccoli, spinach, kale, asparagus and so on. White radish, onion, ginger and garlic are not green leafy vegetables, but also have the effect of improving resistance. It's hard truth to eat at least one pound of vegetables every day. There are more varieties. Remember that light-colored vegetables are best eaten raw, do not heat for too long, and do not fry. In addition, fried carrots can better serve their nutritional value. Pumpkin can be steamed, boiled, washed and sliced. After being salted for a few hours, it can be chilled with vinegar. It can be transformed into a nutritious and delicious dish simply by cooking. In addition, pig liver and chicken liver also contain more vitamin A, can also be eaten properly. Second, dark fruits make up a variety of vitamins Fruit is a good choice for multivitamin supplementation, and each fruit has its own irreplaceable nutritional value. Anthocyanins are very effective in stimulating the vitality of the immune system. Fruits rich in vitamin C and anthocyanins should always be selected. Such as bananas, oranges, kiwi, strawberries, red dates and so on. Tip: Fruits rich in vitamin C and anthocyanins, such as bananas, oranges, kiwi, blueberries, mulberries, strawberries, etc., Americans recommend blueberries, although it is good, but its limited production in the country, you can choose blueberry dry. Fruits can be eaten between half a catty and a catty a day, so it is better to choose seasonal varieties. The valve is a series of gas emergency shut off solenoid valves, specially designed as gas pipe breaker for emergency use. It can be connected with gas leaking detection sensor, fire alarm circuit or other intelligent sensor modules so that on site or remote shut down on gas supply (manually or automatically) is possible, hence ensuring the safety on gas usage. The valve features an auto-close when strong vibration is detected. After close, manual operation is required to turn on the valve. This feature meets safety regulations in the event of an accident. Small Solenoid Valve,Lpg Solenoid Valve,Shut Off Solenoid Valves,High Pressure Solenoid Valve Rictron Industrial Co., Ltd , https://www.szrictron.com