1. Lowering blood lipids, preventing atherosclerosis: black tea is rich in polyphenols, which can lower blood lipids, reduce fat deposition, and avoid the formation of atherosclerotic plaque.
2. Enhance immunity: polyphenols in black tea have antioxidant, anti-inflammatory and antibacterial effects, which can improve human immunity and prevent colds, inflammation and other diseases.
3. Helps digestion, weight loss: black tea has diuretic, stomachic, promote digestion, etc., can regulate gastrointestinal function, promote the excretion of body wastes, help reduce weight.
4. Improve bad breath: black tea has astringent tightening, anti-bacterial and anti-inflammatory effects, can reduce oral bacterial growth, improve bad breath problem.
However, black tea also has some contraindications:
1. Pregnant women should not drink: because black tea contains caffeine and theophylline and other ingredients, for pregnant women are more stimulating, easy to produce adverse effects on the fetus.
2. Indigestion patients should not drink: black tea has a stimulating effect on the gastrointestinal tract, indigestion patients should drink with caution to prevent aggravation of the condition.
3. High blood pressure patients limit drinking: black tea contains theophylline and caffeine and other ingredients, easy to make blood pressure rise, high blood pressure patients should not drink.
4. Anemia, hypoglycemia patients with caution: because black tea contains a large amount of ellagic acid, which can easily lead to anemia, at the same time, ellagic acid can also promote the secretion of insulin, affecting the stability of blood glucose, hypoglycemia patients should be used with caution.