Black tea is rich in carotene, vitamin A, calcium, phosphorus, magnesium, potassium, caffeine, isoleucine, leucine, lysine, glutamic acid, alanine, aspartic acid and other nutrients. The chemical reaction of polyphenols in the fermentation process of black tea makes the chemical composition of fresh leaves change greatly, and it produces the components such as theaflavins and thearubigins. The aroma of the black tea is significantly higher than that of the fresh leaves, forming the unique color and fragrance of the black tea. ,taste.
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