Dietary contraindications

1. Eating black-spotted sweet potatoes will cause poisoning

Sweet potatoes with brown or black spots are contaminated by black-spotted bacteria. The toxin released by Alternaria alternata contains sweet potato ketone and sweet potato ketone alcohol, which makes sweet potato hard and bitter, and is not toxic to human liver. The biological activity of this toxin can not be destroyed by boiling, steaming and roasting, so eating raw or cooked sweet potato with black spot can cause poisoning.

Second, the dietary taboo of milk

Drinking a cup of warm milk in winter will warm your stomach and make you sleep well. When it comes to milk, it seems that chocolate can never be forgotten, but it is very unscientific to drink milk and eat chocolate at the same time. Because milk is rich in calcium and protein, and chocolate contains oxalic acid, when milk and chocolate are eaten together, calcium in milk and oxalic acid in chocolate easily form water-insoluble precipitate-calcium oxalate. People can't absorb it, and after a long time, there will be dry hair, diarrhea, calcium deficiency and growth retardation. Therefore, the time to drink milk and eat chocolate should be separated.

foods that should not be eaten with milk: oranges and milk-oranges should not be eaten about 1 hour before and after drinking milk. Because once protein in milk meets the fruit acid in orange, it will solidify, which will affect the digestion and absorption of milk, and it is not suitable to eat other acidic fruits during this time.

Fruit juice and milk-milk agglutinates in the acidic environment of fruit juice. 8% of the protein in milk is casein. When the pH of milk is below 4.6, a large amount of casein will agglutinate and precipitate, which is difficult to digest and absorb, and even lead to indigestion or diarrhea.

Therefore, it is not advisable to add acidic drinks such as fruit juice to milk. Milk and sugar-milk and sugar react under heating conditions to produce harmful substances. Lysine contained in milk can react with fructose under heating conditions to produce toxic fructosyl lysine, which is harmful to human body. Don't add sugar to fresh milk when it is boiled. It's not too late to add sugar after the milk is cooked and cooled a little.

Third, eating hot pot improperly is easy to get sick

Hot pot is one of people's favorite foods in winter, but eating hot pot also has many dietary taboos. If it is slightly improper, it is likely to cause gastrointestinal discomfort or even poisoning. First, eating instant-boiled mutton should not simply pay attention to the "tenderness" of the meat. Many people think that the mutton slices cooked in seven or eight degrees are delicious when they eat hot pot, but it is easy to catch trichinosis. Second, the time to eat charcoal hot pot should not be too long. Because, when eating a pot, there are often many people in a small room, the indoor temperature is high, the air is not circulating, the indoor lack of oxygen, and the charcoal can't burn completely, which will produce a lot of carbon monoxide, which is easy to poison people.

fourth, eating casserole stew often is easy to hurt your health

casserole gives people a safe and healthy feeling. Eating casserole stew in winter makes people have a good appetite. However, casserole dishes should not be eaten often. For the dishes stewed in casseroles, due to the long heating time, protein, an animal edible raw material, degrades, the dissolving ability of water is weakened, and a large amount of gel liquid is precipitated, which increases its toughness and makes it taste bad, which is not conducive to human digestion and absorption.

The loss rate of minerals and vitamins in raw materials is high when stewed in casserole. In addition, due to the strict sealing, it is difficult for the odor substances in the raw materials to escape, and some valeric acid and low fat still exist in the raw materials and soup, which will generate substances harmful to human body in the thermal reaction.

5. Drinking overheated drinks can easily lead to cell death

Hot drinks can make people feel a little warmer in the cold winter. However, drinking beverages with high temperature will cause extensive skin and mucous membrane damage. protein begins to denature at 43℃, and gastrointestinal mucus will be irreversibly degraded at 6℃. When the temperature is above 47℃, all blood cells, cultured cells and transplanted organs will die, so don't drink overheated beverages frequently in winter.

tips on healthy eating

1. which foods should be preferred for healthy eating in winter

in winter, people generally feel that their mouth, nose, skin and other parts are a little dry. Chinese medicine believes that the relationship between lung and season is very close. Therefore, it is advisable to eat more foods with the function of moistening lung and promoting fluid production.

According to the introduction of modern nutritionists, the foods suitable for eating in winter include dog meat, beef, chicken, turtle meat, mutton and shrimp meat. Vegetables include soybeans, broad beans, carrots, onions, garlic, leeks, mustard greens, rape, parsley, etc. Fruits include chestnuts, preserved apricots, oranges, grapefruit, etc. There are brown sugar, glutinous rice, goat milk, pine nuts and so on.

First, lotus root

Raw lotus root can clear away heat, promote fluid production and quench thirst, while cooked lotus root can strengthen the spleen, stimulate appetite and benefit blood. Therefore, there is a saying that "the lotus root should be raw in summer, cooked in autumn, fresh and tender in raw food and strong and old in cooked food".

Second, Monopterus albus

Eating Monopterus albus in autumn and winter not only has a strong tonic effect, but also has a certain regulating effect on blood sugar. In winter diet, such as roasted eel, stewed eel, fried eel shreds, eel porridge, etc., are all health food.

Third, chestnuts

Chestnuts have the functions of strengthening the spleen, nourishing the stomach, tonifying the kidney and strengthening the bones, and are also known as the king of tonifying the stomach.

Fourth, red dates

Red dates have the effects of nourishing yin, moistening dryness, benefiting lung and invigorating qi. If they are stewed with tremella, lily and yam, the effect will be better.

Fifth, chicken soup

Winter is the season of high incidence of bronchitis, and one of its preventive measures is to drink chicken soup, which is especially beneficial to children. According to the analysis, hen fat can enhance the secretion of bronchial mucosa and eliminate phlegm. In addition, there is a special substance in chicken, which can enhance the blood circulation of pharynx and secretion of nasal mucosa, and is of great benefit to keep respiratory tract unobstructed, remove respiratory virus, relieve cold and nasal congestion, and treat dry throat and cough.

Sixth, animal viscera

Animal viscera such as liver, kidney and heart contain a lot of vitamin B2. In late winter and early spring, due to the dry climate, many people have chapped lips and are prone to angular stomatitis, which is caused by the lack of vitamin B2.

Seventh, kelp

Kelp contains more iodine, which contributes to the synthesis of thyroid hormone, and thyroid hormone has a thermal effect. Therefore, eating kelp in moderation in late winter and early spring has a good effect of keeping out the cold.