It is understood that Professor Chen Xun, a contemporary tea master in China and a world-famous tea expert, clearly pointed out in his book Tea Pharmacy that tea does not contain tannic acid. So, where does the tannic acid theory come from? It turned out that the bitter substance in tea was mistaken for tannic acid without clear understanding. Later research confirmed that this bitter substance was not tannic acid, so it was renamed polyphenol, or tea polyphenols.
Tea polyphenols are the general name of dozens of flavonoids, among which flavanol is the main component with health care function in tea. Some later reports still follow the old "tannic acid theory", which is obviously a historical misunderstanding.
Tannic acid exists in the peels and fruits of many trees, such as oak and sumac. It is a chemical preparation, which is often used in photography, tanning and pharmaceutical industries and is toxic to human body. It is really wrong to impose the toxic and side effects of tannic acid on tea, and tea makes irresponsible remarks about tea.
Since tea polyphenols are not tannic acid, drinking tea will certainly not affect the absorption of iron. Moreover, Keiichi Harada, a Japanese doctor of medicine, also found that chlorophyll and vitamins in tea can promote the formation of hemoglobin, so it has the effect of enriching blood. Another American scientist found that vitamin P in tea helps to increase the number of red blood cells, so drinking tea helps to treat anemia.
With the development of modern science and technology, not only almost all the effective components in tea have been clearly analyzed, but also its multiple health-care effects such as anti-cancer, anti-aging and improving human physiological activity have been recognized all over the world.
-So the saying that "tea contains a lot of tannic acid" does not exist. Tea has the effect of health care, and drinking tea often is good for health. It is more helpful for anemia treatment. In addition, people with gastritis should choose black tea and hot tea of black tea.
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