Tea is the most popular drink in the world. According to statistics, more than half of the people in the world drink tea every day. In addition to food culture, many people often drink it because it has the effect of "slimming".
Does a cup of green tea after a big meal really help to reduce body fat? Indeed, tea contains many ingredients that help to maintain the body, among which catechin is the most famous.
Green tea: the content of catechin is the highest.
Catechins belong to polyphenols, which are usually called tea polyphenols and tea tannins. They are the main source of bitterness in tea, and the most common one is EGCG, which has high oxidation resistance.
Cheng Hanyu, a home care nutritionist of Taipei Dietitians Association, pointed out that catechins can inhibit the activity of amylolytic enzymes in the intestine, reduce the speed of glucose absorption in the intestine, and thus slow down the rise of postprandial blood sugar. Some studies have also pointed out that catechins can inhibit adipose tissue proliferation, promote cell metabolism and reduce fat accumulation.
In addition, drinking tea during exercise is more conducive to burning fat, and catechins are very powerful. Cheng Hanyu explained that because the exercise * * * human body's norepinephrine secretion induces lipolytic enzyme action, which converts fat into energy needed for exercise, it has the function of reducing fat. However, another enzyme T in human body will decompose norepinephrine and affect fat metabolism. If you drink tea at the same time, the catechin in it can just inhibit the T effect, and the fat burning efficiency can be improved by 65,438+07%.
Among all kinds of tea, the highest catechin content is unfermented tea, such as green tea, fried tea, Longjing and so on. Followed by semi-fermented tea, such as Wenshan Baozhong tea, frozen top tea and other light fermented tea, and heavy fermented tea such as Dongfang Meicha; And the least content is completely fermented tea, such as black tea, so in the past, most people thought that green tea had a significant weight loss effect.
Oolong tea: auxin promotes gastrointestinal peristalsis
However, besides catechin, the study published in the journal Nutrition of 201/kloc-0 found that other tea polyphenols, such as theaflavins and thearubigins, also have lipid-lowering effects, while theaflavins and thearubigins exist in oolong tea and black tea. Cheng Hanyu pointed out that human studies have found that drinking oolong tea for six weeks in a row can reduce the blood lipid concentration.
Professor from the Institute of Biotechnology of Zhongxing University has found that oolong tea contains ghrelin, which can promote gastrointestinal emptying and secretion of growth hormone, but it can also cause hunger.
Hunger in oolong tea, also known as "tea hunger", can increase appetite by five times, make tea drinkers feel hungry, and thus promote gastrointestinal peristalsis. Interestingly, however, under the action of auxin, the operation of the body is activated. Although I am hungry, I will not increase my appetite, and I am not afraid of getting fat if I eat too much.
Further analysis shows that all kinds of oolong tea contain theanine, among which "Qingxin Oolong Tea" can increase appetite by 5 times. Other kinds of tea, including Tieguanyin tea, Wuyi tea and Bai Hao oolong tea, can double the appetite.
Pu 'er tea: Tannic acid prevents the small intestine from absorbing fat.
Pu 'er tea, which originated in ancient China, is also a kind of tea that people in China often use to remove oil and greasy. In 2000, Sun Luxi, a professor in the Department of Food Science of Taiwan Province Provincial University, published a study that Pu 'er tea can inhibit the synthesis of cholesterol in the liver, effectively reduce cholesterol, triglycerides and free fatty acids in plasma, increase the excretion of cholesterol in feces, and inhibit the oxidation of low-density lipoprotein (LDL).
The reason is that hydrolyzed tannins in polyphenols contained in Pu 'er tea play a role.
Cheng Hanyu said that when people eat, the fat (triglyceride) in food will enter the stomach, which will be absorbed by the pancreatic lipolytic enzyme secreted by the pancreas and become the energy needed by the human body. In other words, the key to start the body to absorb fat lies in the lipolytic enzyme of pancreas.
Hydrolyzed tannins contained in Pu 'er tea can effectively inhibit the production of pancreatic lipolytic enzymes, so the oil we eat cannot be absorbed by the small intestine and will be excreted with feces. "After drinking Pu 'er tea, many people's feces become soft, precisely because of its high oil content. Eating too much but not being absorbed by the body can naturally maintain weight and even lose weight.
She also stressed that if you want to get twice the result with half the effort, drink a cup of tea every day (about 350? 400cc), combined with resistance exercise, can not only reduce body fat, but also increase muscle mass, with the best slimming and bodybuilding effect.
This week's weekly authorized to reprint the health miracle of the original tea.
Recommended reading: After the New Year, get rid of the fat and oil in your stomach. DIY "Chinese medicine oil-cut green tea" helps to reduce fat, but it can't lose weight after strenuous exercise. Is that what this is about?