1. Efficacy: Black tea can lose weight and promote digestion. Contains caffeine, vitamin B 1 and other nutrients, which is helpful to promote gastric juice secretion.

2. Function: Black tea has the function of regulating blood pressure and blood sugar, which can control blood sugar, activate dopamine neurons and inhibit blood pressure.

3. Taboo: Drinking too much black tea will lead to osteoporosis. Because black tea is rich in fluorine, it is recommended to drink black tea in moderation. In addition, pay attention to keep a cheerful mood and avoid bad emotions such as anxiety and irritability.

The efficacy and function of black tea;

1. Helps to reduce fat and lose weight: Black tea is rich in catechins, which can effectively inhibit fat absorption, promote fat decomposition, help body fat metabolism, and achieve the purpose of reducing fat and losing weight.

2. Promote digestion: Tea polyphenols, theaflavins and other substances in dark tea can promote gastric juice secretion, enhance gastrointestinal movement, promote food digestion, and help digestion and absorption.

3. Anti-oxidation: Tea polyphenols in black tea have anti-oxidation effect, which can scavenge free radicals, help delay cell aging and enhance immunity.

4. Purify blood: Black tea contains alkaloids, minerals and other beneficial substances, which can remove waste and toxins from blood, purify blood and help protect cardiovascular health.

5. Anti-halitosis: Black tea contains a variety of active ingredients, which can remove oral odor and help prevent halitosis.

Taboo crowd:

1. Patients with chronic diseases such as heart disease, hypertension and arteriosclerosis. Because black tea contains caffeine and theophylline, it is easy to increase cardiovascular load and aggravate the condition.

2. Patients with dyspepsia, gastric ulcer and liver disease. Catechins and other components in black tea can stimulate gastric acid secretion, increase the burden on the stomach and cause gastrointestinal discomfort.

3. Pregnant women, lactating women, children and the elderly. Caffeine and other components in black tea have more obvious effects on the nervous system and cardiovascular system of this group of people, which is easy to cause adverse reactions.