Drink Scientifically, Live Healthily
Water is the origin of life. Drinking clean and safe water is a primary demand of human existence. How do we get to know the water we drink everyday scientifically? How to drink scientifically? To answer these questions, we are here appealing to everyone to understand the drinking water scientifically for the sake of our own health.
Understand drinking water scientifically
Drinking water refers to water we drink and use in daily life. The quality of drinking water must guarantee a lifetime safety for the drinker. Here, “lifetime” is calculated based on the case that one person takes 2 liters water per day for 70 years (average life span). The so-called “safety” means that there is no harm to human body when drinking this water for a lifetime.
Based on the above objections, our country explicitly stipulated three principal sanitary requirements of domestic drinking water in Hygiene Standards of Domestic Drinking Water GB5749-2006. Firstly, the water is safe according to epidemiology which means there is no pathogenic microorganism in the water. Secondly, the chemical components of the water are safe. That is to say the chemical substances and radioactive substances contained in the water cause no acute intoxication, chronic intoxication or long-term harm to human body. Thirdly, sensory properties of the water are appropriate. The water should be transparent, without any foreign odor or foreign matters.
What are the types of water we drink every day? According to the water supply modes, there are centralized water supply, secondary water supply, direct drinking water and on-site water. No matter what type it is, the drinking water must conform to the national hygiene standards and specifications.
Drink water scientifically
Drinking water scientifically is very important to our health. Scientific water drinking includes four major elements: scientific drinking quantity, scientific drinking time, scientific drinking method, and scientific water quality.
Firstly, the drinking quantity should be appropriate. Generally speaking, an average person should take in more than 2000ml water per day among which 1500ml is for direct drinking purpose. Do not wait to drink when you are thirsty. Old people, children, and people doing a lot of exercise need to take in more water.
Secondly, drinking time should be scientific. For example, drinking in the morning could not only replenish the water we lost in our evening sleep for metabolism but also promote excretion and dilute the blood. One should not drink a lot of water before or after the meal in case gastric juice is diluted, protease activity is weakened, and digestion and absorption are affected. One should take in appropriate quantity of water before bathing and sleeping, which is good for metabolism inside the body, moistening the skin, soothing the nerves and sleeping, and our health. There are “three cups of water” are very important, especially for the old people. You may drink the first cup with an empty stomach after getting up in the morning. It could reduce the blood viscosity and increase the circulating blood volume. Drinking the second cup before sleeping could prevent the increasing of blood viscosity in the evening. Drinking the third cup in the middle of the night when you are awake could reduce the occurrence of cardiocerebral events.
Thirdly, drinking method should be scientific. Boiling the water for more than 2 minutes will effectively kill the pathogenic microorganism in water and evaporate chlorine and other harmful volatile substances. The best drinking temperature is between 18℃and 45 ℃. Water too hot will damage tooth enamel and intensely stimulate the throat, digestive tract and gastric mucosa. Water too cold will also stimulate gastric mucosa and cause mucosa impairment and gastro-intestinal discomfort. When you first turn on the tap in the morning, you should draw off some water because the still water will breed microorganism and be polluted by hydration reaction with the metal pipe.
Finally, the tap water should meet the sanitary standards. Water boiled for several times and stored for more than three days is harmful for the health and undrinkable.