When it comes to dark tea, we must first start with its effects. Dark tea is one of China's six major tea categories, belonging to post-fermented tea with a long production history, and is known as a "drinkable antique." Many studies have shown that dark tea has the effects of supplementing dietary nutrition, aiding digestion, resolving greasiness, and smoothing the肠胃; reducing fat, uric acid, and blood pressure, softening blood vessels, and preventing cardiovascular diseases; anti-oxidation, anti-mutation, and delaying aging; lowering blood sugar, improving sugar metabolism, and preventing diabetes; sterilizing, diuresis, and detoxification; reducing the harm of tobacco and alcohol, etc.

Internationally, dark tea is called "Weight Loss Tea" by Koreans, "Beauty Tea" by Japanese, "Digestive Tea" by Taiwanese, and "Slim Health Tea" in Southeast Asia. In places like Korea and Japan, "Qian Liang Tea" is used as a treasure to镇宅.

It has been recorded in the "Compendium of Materia Medica." For example, to regulate the肠胃, drinking two cups of dark tea daily can quickly restore gastric and intestinal motility. In addition to patients with gastrointestinal diseases using it for recovery, white-collar workers who often sit in the office should drink more dark tea.

The medical motto of Professor Macy from Stanford University in the USA is: "Drink more dark tea to help your digestive system do gymnastics every day." Not only that, dark tea can also improve sleep. During the purification and物质络合 process, caffeine衰减较多, while abundant theanine, tea polyphenols, and other substances are preserved.

Theanine has a calming and soothing effect, protecting brain nerve cells, and can counteract and regulate the excitement caused by caffeine. Therefore, drinking dark tea not only does not affect sleep but反而 improves sleep quality, preventing insomnia, neurasthenia, and other symptoms.