Regarding the efficacy of green tea and black tea, there are rumors circulating in the rivers and lakes that "green tea hurts the stomach, and black tea nourishes the stomach", so is there a scientific basis for such a statement? What is the right way to drink tea?
Green tea is one of the most famous teas in China, and the main varieties include Biluochun, West Lake Longjing, Huangshan Maofeng, Lu'an Gua Pian, etc. Its production method is mainly to pick fresh tea leaves, and then go through steps such as killing, rolling, and drying.
Because green tea is not fermented and retains a variety of nutrients such as tea polyphenols, it has the effects of refreshing the mind, eliminating fat and removing greasy, clearing heat and detoxifying, diuretic and detoxifying.
Whereas, black tea is made on the basis of green tea and goes through a fermentation process. During the fermentation process, the tea polyphenols in the tea leaves are oxidized to form substances such as thearubigin and theaflavin. This makes black tea bright red in color, soft in taste, rich in aroma, and more resistant to brewing than green tea.
Many people believe that black tea can nourish the stomach, while green tea has a stimulating effect on the stomach, so there is a saying that "green tea hurts the stomach, and black tea nourishes the stomach". But in reality, the stomach-nourishing effect of black tea and green tea is not as people think.
Black tea contains a certain amount of caffeine, which can stimulate the secretion of stomach acid, which helps digestion, but if you consume caffeine in excite, it may cause some irritation to the stomach.
In addition, black tea also contains an antioxidant substance called "tea polyphenols", which has a certain anti-inflammatory effect and also helps in the protection of the gastric mucosa.
However, it should be noted that black tea has a higher caffeine content than green tea, so if you are a person with cardiovascular and cerebrovascular diseases or a hot constitution, you need to pay attention to the amount of black tea you drink.
Green tea also contains a certain amount of caffeine, but it is lower than black tea. In addition, green tea is also rich in tea polyphenols and vitamin C, which have various effects such as antioxidant and anti-cancer.
The tea polyphenols in green tea can promote the peristalsis of the stomach, help digestion, stimulate the secretion of gastric juice, and increase the protective effect of the gastric mucosa.
However, it should be noted that the caffeine and tea polyphenols in green tea are more irritating to the stomach, and for patients with weak spleen and stomach, strong tea, cold tea and expired spoiled tea cannot be drunk.