In the cold winter, if the elderly choose some foods that are helpful for invigorating qi and strengthening yang in their diet, they can speed up metabolism, enhance secretion function and effectively improve the phenomenon of chills.

Meat: Among the meats, dog meat, mutton, beef, pheasant, duck, crucian carp, octopus and grass carp have the best cold-proof effect. They are rich in protein, carbohydrates and fat, and produce a lot of heat, which is beneficial to tonifying kidney and strengthening yang, warming the middle and lowering the temperature, invigorating qi and generating blood.

Rhizomes: According to the research, the old people's fear of cold is related to the lack of inorganic salts in the body. Carrots, sweet potatoes, green vegetables, Chinese cabbage, lotus roots, cauliflower, green onions, potatoes and other root vegetables contain a lot of minerals, which can be mixed with meat to keep out the cold.

Iron-containing foods: Iron-deficiency anemia is easy for the elderly to be afraid of cold, so they should eat more iron-containing foods, such as animal blood, egg yolk, donkey meat, pig liver, beef kidney, sheep tongue, soybeans, sesame seeds, yuba, black fungus and so on.

Iodine-containing food: The human thyroid gland can secrete a hormone called thyroxine, which has the function of generating heat. Thyroxine is composed of iodine and tyrosine. Tyrosine can be "produced" by the body, but iodine has to be supplemented by the outside world. Kelp, laver, shellfish, oysters, sardines, spinach, fish and shrimp are rich in iodine, so you may choose to eat them.