Milk, coffee and tea are three national drinks with great health care functions. To compare the advantages and disadvantages of these three kinds of commonly used beverages, it is necessary to draw up several specific comparison indicators for common inspection. Hehejun specially listed three criteria to make these three countries drink a big PK.
I. Nutritional components:
? Milk: The average content of protein in fresh milk is above 3%, mainly including casein, whey protein and lactoglobulin. , all belong to good protein. However, the protein digestibility of milk is 90- 100%, and the utilization rate can reach 75- 100%, while the biological value (the percentage of protein eggs retained in the body after absorption) is as high as 85%, only higher than that of eggs. Milk fat is rich in fat-soluble vitamins and free fatty acids, and is rich in lecithin, cephalin and neuropeptide, which is an essential component to maintain the structure of human brain and other cells. However, the most important thing is the calcium in milk, which is an important source to promote the growth of human bones.
Coffee: Let's talk about the nutrition of coffee first. The nutrients in coffee include fat (acidic fat and volatile fat) and protein. The former is easy to volatilize with coffee or only has the effect of producing sour taste, while the latter is difficult to ingest because it is not easy to dissolve. In addition, the contents of iron, phosphorus, sodium carbonate and other minerals contained in coffee are very small.
Tea: finally, look at the nutrients in tea. Tea contains vitamins A, D, E, K, B 1, B2, B3, B5, B6, H, C, P and so on. Among them, vitamin C is relatively high, and the average content is about 0/00g green tea 100 ~ 250mg. In addition, tea also contains water-soluble protein and 25 kinds of amino acids needed by human body. In addition, there are many trace elements, among which zinc content is relatively high, with an average zinc content of 73 micrograms per gram of black stripes.
In terms of nutrients, milk has the best content, better than coffee and tea.
Second, the antioxidant function:
Milk: Vitamin A in milk can prevent night blindness and has antioxidant function. The research team of the University of Kansas Medical Center once conducted a study and found that the brains of elderly people who drink milk contain more glutathione. Glutathione is a powerful natural antioxidant in the brain, which can help reduce the oxidative stress in the brain and the damage caused by reactive chemical compounds during metabolism. It is concluded that milk may also have antioxidant function on the brain and reduce the incidence of neurodegenerative diseases (such as dementia).
Coffee: Of all foods, coffee contains the most chlorogenic acid. Chlorogenic acid has antioxidant effect, which is considered to be related to the prevention of chronic diseases or cancer, so as to reduce the damage of free radicals to cells. In addition, coffee contains a lot of caffeine. According to the research results released by a research team of a Mexican university, caffeine is the main source of antioxidants in coffee, and antioxidants in coffee can find free radicals related to Alzheimer's disease and heart disease, and then destroy them. Is beneficial to human health.
Tea: As for tea, there are polyphenol antioxidants, which can effectively remove free radicals and inhibit oxidation. A cup of freshly brewed original leaf tea contains more than 200 mg of polyphenol antioxidant, which is considered to be the antioxidant with the highest CP value. In addition, catechins in green tea can effectively dilate blood vessels, accelerate blood circulation, and also have antioxidant function.
Compared with tea, coffee has a slightly better antioxidant function.
Third, refreshing effect:
Milk: Clinical experiments have confirmed that drinking more milk can refresh you, because the amino acids that make up milk protein in milk can produce orexin from hypothalamic cells, which is a hormone produced by hypothalamic cells. Only when appetite is sufficient, people will not feel sleepy. Studies also show that the sugar in milk can concentrate people's attention and moderately boost their spirits.
Coffee: It is generally believed that the main function of coffee is refreshing. A cup of coffee contains about 75 to 150 mg of caffeine, which can achieve refreshing effect in a short time. But coffee not only diuretics, but also inhibits the absorption of water in the body, leading to the rapid loss of iron, leading to long-term energy consumption. Although coffee can boost energy in a short time and has a refreshing effect, it will soon fade away, and many people will feel more tired after a few hours.
Tea: As for catechins in tea, it can effectively dilate blood vessels, accelerate blood circulation, make the brain awake, and activate the memory and cognitive ability of the brain more than coffee. In addition, catechins can slow down the decomposition of dopamine and adrenaline in the brain, making people refreshed and awake quickly. Because the content of caffeine in tea soup is much less than that in coffee, the side effects on stomach and nerves are also relatively small.
In terms of refreshing effect, coffee and tea have similar effects, both of which are better than milk, but coffee can only refresh itself quickly in a short time, and tea has less side effects than coffee.
No matter how much you like drinking these three drinks, they can't completely replace drinking water. After comparing the benefits of milk, coffee and tea to human health, HEHO still wants to remind everyone that no matter which of these three drinks can be counted in the daily drinking water, they cannot completely replace the importance and status of water to human health. I hope everyone still drinks more water, at least 1.5 million per day.