Pu 'er tea is a specially treated tea with many health functions. It is rich in bioactive substances, such as tea polyphenols, caffeine and amino acids, which can play the following roles:

1. Promote digestion: Pu 'er tea can stimulate gastrointestinal peristalsis, promote food digestion and relieve stomach discomfort.

2. Lowering cholesterol: Tea polyphenols and tea polyphenol esters in Pu 'er tea can lower serum cholesterol and protect cardiovascular health.

3. Antioxidant: Tea polyphenols in Pu 'er tea have a strong antioxidant effect, which can prevent free radicals from damaging human cells and maintain health.

4. Regulating blood sugar: Polysaccharides in Pu 'er tea can slowly release glucose and reduce blood sugar level, which is especially beneficial to diabetic patients.

5. Lose weight: Pu 'er tea can accelerate metabolism and consume body fat, which can play a better role for people who need to lose weight.

While enjoying the health benefits brought by Pu 'er tea, we should also pay attention to some contraindications, such as:

1. Hyperacidity: Pu 'er tea will stimulate gastric acid secretion, which may aggravate the symptoms of hyperacidity.

2. Hypertension: Pu 'er tea contains caffeine. Excessive drinking will lead to an increase in blood pressure, which is not good for patients with hypertension.

3. Pregnant women: Pu 'er tea contains a certain amount of caffeine. Excessive drinking may affect the fetus, so pregnant women should drink it in moderation.

4. Liver diseases: Tea polyphenols in Pu 'er tea can stimulate the liver, so patients with liver diseases should drink it carefully.