Should we drink hot water or cold water when the weather is hot?

In real life, whether it is physiological period, gastrointestinal discomfort, headache and brain fever, more people firmly believe in drinking more hot water. It seems that drinking hot water has become a cure for all diseases, but is this really the case? Not exactly.

First of all, drinking more water is good for your health, but it is best to keep warm.

1. Water is the source of life. We really need to replenish a lot of water to maintain the balance of body fluids, regulate body temperature and excrete nitrogen-containing wastes and other metabolites. Therefore, the idea of drinking more water is correct. According to the recommendation of Dietary Guidelines for China Residents (20 16), adults with mild physical activity should drink at least 1500~ 1700 ml (7-8 cups) of water every day. Under the condition of high temperature or strong physical activity, it should be increased appropriately. It should be noted that drinking too much water will also do harm to human health.

As for the water temperature, China people are more suitable for warmth, not the hotter the better.

Because the delicacy of food is mostly related to temperature, China people have a soft spot for hot food. This can be traced back to 20 thousand years ago. Pottery made by the ancients was used for cooking and boiling water. At the same time, boiling water can also effectively inhibit bacteria. In that era of poor sanitation, the habit of drinking hot water gradually formed.

However, modern research believes that drinking water is not as hot as possible. Excessive water temperature will burn the digestive tract mucosa. It is more appropriate to use warm water of 34~38℃, and the water temperature should not exceed 60℃ as far as possible.

In addition, many young people are not unable to learn the western habit of drinking cold water and ice water, but our stomach acceptance is not high, which is easy to cause stomach discomfort and induce diseases.

Second, can drinking hot water really prevent all diseases? I'm afraid it's just a good wish.

1. When people are in a state of diseases such as diarrhea, their body fluids will decrease and they will feel thirsty easily. Therefore, drinking a cup of warm water can replenish body fluids and has a certain "warming" effect, relieving muscle and vascular spasm, but it can't relieve the root cause.

Taking dysmenorrhea as an example, the fundamental reason lies in the increase of prostaglandin content in endometrial or pelvic organic lesions, and the decrease of estrogen content and pain tolerance in the body. Drinking water can supplement the fluid loss caused by menstruation, but it can't change the hormone level, nor can it alleviate organic diseases. Especially for people with severe dysmenorrhea, drinking hot water can only increase psychological comfort. Even if you drink more hot water, no matter how high the water temperature is, it has little practical significance for relieving dysmenorrhea.

Drinking hot water to prevent colds is not absolute. Drinking plenty of water can help maintain the body's immunity in a normal state, at the same time, it can also reduce the viscosity of respiratory secretions and enhance the ability to block the invasion of pathogens. From the above point of view, drinking more warm water does have a certain effect on preventing colds.

But there are many kinds of colds, especially the flu, which is more contagious and pathogenic. It is not enough to drink hot water, but also to improve immunity and cultivate good hygiene habits. Of course, if you catch a cold, drinking more warm water really helps to relieve the symptoms.

It is not reliable to say that drinking hot water can nourish the stomach. Under the influence of China people's eating habits, too cold food, water or cold air enter the stomach, which will cause vasoconstriction under the gastric mucosa, and then lead to spasmodic pain in the stomach. Drinking warm water at this time can really relieve the pain, which also makes many people mistakenly think that drinking hot water can nourish the stomach. In fact, in addition to drinking warm water, you can also drink soup and coffee, or hot compress can also achieve the effect of relieving stomach discomfort. However, if you drink too much water before and after eating, it may cause the digestive juice in your stomach to be diluted and affect your digestive function.