Tea will be polluted by harmful substances such as pesticides during planting and processing, and there will always be some pesticide residues on the surface of tea. The first cup of tea is used to wash tea. You should pour it out and not drink it.

2. Don't drink new tea

From the point of view of nutrition, the nutrition of new tea is not the best.

New tea refers to tea that has been picked for less than a month. Because these tea leaves have not been placed for a period of time, some substances that have adverse effects on the body, such as polyphenols, alcohols, aldehydes, etc., have not been completely oxidized. Diarrhea and abdominal distension after drinking, new tea may stimulate people's gastric mucosa, and easily induce discomfort such as stomach diseases. So drinking less new tea is good for your health.

Step 3 don't drink strong tea

Drinking strong tea will make people more excited and have a certain impact on the nervous system and cardiovascular and cerebrovascular systems. Patients with cardiovascular and cerebrovascular diseases, insomnia and hypoglycemia must avoid drinking strong tea. Once the consequences are unimaginable, tachycardia, arrhythmia and insomnia will occur.

4. Don't drink tea before eating.

Drink plenty of tea or strong tea before and during meals. It will affect the absorption of nutrients such as calcium, iron, zinc and zinc.

Don't drink milk and other dairy products while drinking tea. Theophylline and tannic acid in tea will combine with calcium in dairy products to form water-insoluble calcium salts, which will be excreted, greatly reducing the nutritional value of dairy products.

5. Don't drink overnight tea

Overnight tea contains a lot of theophylline, which may have a bad effect.