Oolong tea contains caffeine, theophylline, theobromine, volatile oil, vitamin C, quercetin, tannin and so on. It is very conducive to lowering blood fat and promoting metabolism. Suitable for all kinds of obese people to drink. The reasons for "drinking oolong slimming tea without diarrhea" are: the drinking method is wrong; A large amount of tannic acid in tea will combine with protein to produce tannic acid protein, which has astringent effect and weakens intestinal peristalsis, thus prolonging the retention time of food residues in the intestine and leading to dry stool. Therefore, don't drink tea immediately after a full meal, and then drink it every half an hour. In addition, all kinds of drinks and drugs used to lose weight should be drunk and taken before meals to achieve the best weight loss and intellectual fitness effect.