Black tea contains a large amount of phenolic substances. Despite their high molecular weight, these phenolic compounds are quite distinct from those found in green tea.
Clinical trial results show that black tea also possesses Antioxidant properties, helps lower blood lipids, inhibits arterial hardening, enhances capillary function, and has anti-mutagenic effects. Due to its polysaccharide content, drinking black tea can also help regulate blood Sugar levels. Moreover, black tea has potent antibacterial and anti-inflammatory effects.
As a fully fermented tea, during processing, the main chemical component in fresh black tea leaves, catechins, undergoes a series of enzymatic changes under the influence of enzymes. Catechins are oxidized and polymerize into large molecules known as theaflavins and thearubigins.
Black tea is made from young tea leaves through complex processes including withering, rolling, fermentation, and Drying, and it is typically produced in regions with a temperate climate (such as Keemun black tea, Yunnan black tea, and Zhenghe black tea).
Black tea is warming in nature and has the effect of warming the stomach, strengthening the spleen, clearing heat, and reducing turbidity. People with a deficiency-cold constitution should prefer black tea, which increases blood flow to the kidneys, raises glomerular filtration rate, dilates renal microvessels, inhibits reabsorption of water by renal tubules, and promotes increased urine output. This helps eliminate lactic acid, uric acid, excess salt, and harmful substances from the body, thus alleviating edema caused by heart disease or nephritis.
The methods of drinking black tea can be summarized as follows: plain brewing and mixed brewing. For plain brewing, place tea leaves in a teapot, pour boiling water over them, then transfer the Infusion to a cup for slow sipping. Mixed brewing involves placing tea leaves in a teapot, adding boiling water, pouring out the tea liquor, and then adding milk, sugar, honey, lemon juice, or other preferred ingredients to the cup before consumption.
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