Most tea leaves are alkaline. ?Physical and chemical research on tea drinks shows that the pH of most tea products, including green tea, scented tea, oolong tea, black tea, and raw Pu'er tea, is weakly acidic. Fresh raw Pu'er tea has the highest alkali content, followed by green tea.

The PH value of various tea soups is generally in the range of 5.5-7, which is weakly acidic. However, the acidity has a certain relationship with the type of tea, brewing time and the age of the tea.

Tea leaves with different tenderness also have different pH levels. In addition, different materials are different. The acidity of bud tea is relatively weaker than that of leaf tea. That is, the younger the tea leaves, the weaker the acidity, and the older the tea leaves, the stronger the acidity.

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Extended information:

1 , Tea is an alkaline drink, which must maintain a weak alkaline state in the body of normal people. The basic foods such as meat, fish, eggs, various fried foods, flour foods, etc. that people eat in daily life are all Acidic foods.

2. Tea polyphenols are the most abundant soluble components in tea and are also the most important substances for tea to exert its health care effects. The most typical representative is catechin (phenol), which has antioxidant properties. (eliminating oxygen free radicals), anti-inflammatory, reducing the incidence of cardiovascular disease, preventing cancer, lowering blood lipids, reducing body fat formation, antibacterial, changing the ecology of intestinal flora, and many other effects.

3. New tea also contains more caffeine, active alkaloids and a variety of aromatic substances. These substances can also excite people's central nervous system and are suitable for patients with neurasthenia and cardiovascular and cerebrovascular diseases. It should be consumed in moderation and not before bedtime or on an empty stomach. The correct method is to leave it for half a month before using it.

Reference materials: /baike.baidu.com/item/%E8%8C%B6/6227#9"target="_blank"title="Baidu Encyclopedia-Tea">Baidu Encyclopedia-Tea