The more you drink, the warmer you get, the colder the water gets” It seems that drinking can keep you warm has been recognized by many people. Many of my friends say, “Drinking can produce heat, and drinking in winter can help people to resist the cold.” However, can drinking really warm up the cold? The fact that drinking alcohol can warm the body is actually a misconception, and the fact is that “drinking alcohol to keep the cold cold colder. Why will feel the body “hot” after drinking? The original, alcohol in the body after the decomposition and metabolism of gastric acetaldehyde can make capillary dilation, blood to accelerate the flow. The “hot blood” flow to the skin will produce a warm feeling (the skin feels the temperature difference), people will naturally feel the body surface heat. However, this is only a temporary phenomenon, only the warm blood in the body flows to the lower temperature of the body surface, the extremities of the blood vessels caused by the feeling of “warm”, in fact, the body is constantly losing heat. But on the other hand, the expanded capillaries cannot contract in time to prevent the blood from transferring heat outward, so the capillaries expand after drinking and the body loses heat faster. When the skin and limbs feel the cold air around them, they will naturally contract the peripheral capillaries to reduce the loss of body heat, which is the normal physiological reflex of the body. And “drink to warm up” is actually against the physiological expansion of peripheral capillaries, a moment to feel warm after the heat loss faster, but feel more cold. Therefore, winter after drinking without waking up in the outdoors is particularly prone to accidents due to hypothermia. Drinking cold is not as effective as eating meat cold human body in the process of ingestion, in addition to chewing and other actions consume heat, because the nutrients in the food to digestion and absorption and metabolic transformation, but also requires additional energy consumption. Nutritionists call this additional consumption of heat energy caused by ingestion the specific dynamic action (SDA) of food thermal effect food. Simply put, the body temperature will increase slightly after eating, which is the external manifestation of the thermic effect of food. Generally speaking, the increase in body temperature occurs soon after eating, which is one of the reasons why we feel hot during and after meals. Generally, two hours after eating, the body temperature will reach its peak and return to normal after 2-3 hours. Eat meat and other protein-rich food, will make people feel hot, this is the “food heat effect”. Different ingredients, eaten after the heat effect also varies. The composition of the food is different, the difference in the heat effect produced also differs. The thermal effect of food fat is about 4-5% of its caloric energy, carbohydrates are 5-6%, and protein can reach up to about 10%. Therefore, eat protein-rich meat food, will feel particularly strong after the meal fever. And eat starchy, or vegetable, the effect is much worse. So drinking alcohol to protect yourself from the cold in winter only allows you to release heat from your body for a short period of time, which in itself does not allow your body to generate more heat; the protein in food allows your body to generate extra heat to supplement the loss of heat from low temperatures.