In addition, tea mainly contains protein, lipids, carbohydrates, amino acids, alkaloids, tea polyphenols, organic acids, pigments, aroma components, vitamins, saponins, sterols and other organic substances, which are also needed by the human body.
Extended data:
Introduction of main beneficial ingredients:
1, tea polyphenols
It is the most soluble component in tea, and it is also the most important substance for tea to play a health care role. The most typical representative is catechin (phenol), which has many functions, such as antioxidation (scavenging oxygen free radicals), anti-inflammation, reducing the incidence of cardiovascular diseases, preventing cancer, lowering blood fat, reducing body fat formation, resisting bacteria, changing the ecology of intestinal flora and so on. Studies show that after drinking a cup of tea for half an hour, the antioxidant capacity (the ability to resist oxygen free radicals) in the blood increases by 465,438+0% ~ 48%, and it can last for one and a half hours.
2. Tea pigment
It mainly includes chlorophyll, β -carotene and so on. It has the functions of detumescence, anti-aging and beauty.
3. Theanine
It can improve brain function and enhance memory and learning ability. Can be used for preventing Alzheimer's disease, Parkinson's disease and autonomic nervous dysfunction.
4. Tea polysaccharide
This is a complex mixture. Tea polysaccharide has the functions of anti-radiation, increasing the number of white blood cells, improving immunity and lowering blood sugar. The folk practice of drinking coarse tea to treat diabetes is mainly to play the role of tea polysaccharide.
5. V-aminobutyric acid
It is not much in natural tea, but its content is greatly increased after processing. The main function of γ -aminobutyric acid is to dilate blood vessels and lower blood pressure, so it can be used as an auxiliary treatment for hypertension. It can also improve cerebral blood circulation, enhance the metabolic ability of brain cells, and contribute to the rehabilitation of stroke and cerebral arteriosclerosis sequelae.
6, pyrroloquinoline quinone
The research team of Nagoya University in Japan recently found that pyrroloquinoline quinone in tea has the effect of delaying aging and prolonging life. Pyrroloquinoline quinone was found around 1970, and subsequent studies showed that it has antioxidant and neuroprotective effects, so it is often used in health care products and cosmetics.
Baidu Encyclopedia-Tea (China Traditional Drink)