2. Lowering blood pressure: Amino acids, catechins and other substances in black tea can dilate blood vessels and promote blood flow, thus lowering blood pressure.
3. Antioxidants: Tea polyphenols and other compounds rich in black tea can scavenge free radicals in the body, resist oxidation, help protect cell health and prevent various chronic diseases.
4. Improve gastrointestinal function: Various nutrients in black tea help to promote gastrointestinal peristalsis and prevent constipation and indigestion.
5. Anti-aging: theaflavins and thearubigins in black tea can inhibit the activity of enzymes and reduce the damage of oxides to the body, thus playing a role in delaying aging.
Precautions:
1. Moderate drinking: Black tea contains caffeine and other ingredients, and excessive drinking may lead to poisoning.
2. Avoid drinking before meals: Black tea contains tannic acid and other substances, which should not be drunk on an empty stomach or before meals, and it is easy to stimulate gastric mucosa.
3. Avoid drinking at night: Caffeine in black tea will stimulate the central nervous system and affect sleep. It is recommended to drink before afternoon or evening.