During the fermented process, black tea formed more active ingredients and Theaflavins.
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During black tea production, the catechins are mostly converted to Theaflavins and thearubigins. via polyphenol oxidases.
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Theaflavins(TFs) possess various healthy
and medicinal actions and will serve as effective anti-cardiovascular and blood vessel of brain, anti-atherosclerosis and anti-hyperlipodemia agents.
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The polyphenol in black
tea associated with health effects is Theaflavins which have been found to reduce blood
cholesterol levels in human trials, both total and LDL.