Drinking tea in the winter can prevent dryness.

The winter season is cold and dry, and many people experience dry, itchy skin during this time. The reason drinking tea can prevent winter itch is that tea leaves contain trace elements, such as manganese, that protect the human skin. Drinking tea in the winter can prevent dryness.

The protective effects of manganese on the skin are manifested in three aspects: First, manganese participates in many enzymatic reactions in the human body, promotes protein metabolism, and helps excrete substances harmful to the skin, thereby reducing adverse stimulation to the skin. Second, manganese can promote the accumulation of vitamin B6 in the liver, enhancing the skin's anti-inflammatory function. Third, manganese can enhance the activity of polysaccharide polymerase and galactosyltransferase, catalyzing the metabolism of certain vitamins in the human body, which all contributes to the normal process of sebum metabolism and prevents skin dryness.

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The manganese content in tea is quite high. According to relevant experimental data, the manganese content per gram of dried tea varies by variety. For example, in green tea, Xihu Longjing tea contains 1.40 mg, and Lushan Yunwu tea contains 1 mg. In oolong tea, Anxi Tieguanyin tea contains 1 mg. In yellow tea, Mengshan Huangya tea contains 0.65 mg. In black tea, Keemun black tea contains 0.60 mg. The manganese content in the tea infusion also varies depending on the type of tea. When 1 gram of tea is steeped in 100 ml of boiling water for 10 minutes, the manganese content in the Xihu Longjing tea infusion is 0.506 mg, in the Lushan Yunwu tea infusion it is 0.400 mg, in the Anxi Tieguanyin tea infusion it is 0.238 mg, in the Mengshan Huangya tea infusion it is 0.198 mg, and in the Keemun black tea infusion it is 0.017 mg.

If people drink 4 to 6 grams of green tea infusion daily, they can intake one-third or even more of the human body's required manganese from tea. This is undoubtedly very beneficial for protecting the skin and preventing dryness and itching.