High-Quality Black Tea: The Hidden 'Secrets'
Regular drinkers of black tea may notice a distinct 'golden ring' at the edge of the tea liquor, which is a key indicator of high-quality black tea. This golden ring is formed by theaflavins, a group of compounds derived from the oxidation of polyphenols. Theaflavins significantly influence the colo...
Tea News · Jun 20, 2025
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