1. Improve digestion: Tannic acid and tea polyphenols in old tea can promote gastrointestinal peristalsis, increase gastric juice secretion, improve gastrointestinal digestive function and relieve gastrointestinal discomfort.
2. Antioxidant: Tea polyphenols in old tea leaves have a strong antioxidant effect, which can effectively scavenge free radicals and protect cells from oxidative damage.
3. Calm and soothe the nerves: Caffeine and theanine in old tea have certain calming and soothing effects, which help to relieve emotional problems such as tension and anxiety.
4. Reduce fat and lose weight: Tea polyphenols and caffeine in old tea can inhibit fat absorption, promote fat decomposition, and help reduce blood fat and lose weight.
5. Antibacterial and anti-inflammatory: Old tea leaves contain a certain amount of tea polyphenols, catechins and other substances, which have strong antibacterial and anti-inflammatory effects and can prevent and treat oral infections and other diseases.
6. Anti-cancer and anti-cancer: substances such as tea polyphenols in old tea help to inhibit the growth and spread of tumor cells and prevent and treat various cancers.
It should be noted that old tea leaves also have some adverse reactions, for example, excessive drinking will lead to excessive caffeine, causing headaches, insomnia and other uncomfortable symptoms. Therefore, drinking old tea needs a moderate amount, not too much.