What are the health benefits of dark tea?
Dark tea has many benefits. It is rich in vitamin K and fats such as phospholipids, sulfolipids, and glycolipids. The fatty acids are mainly oleic acid and linoleic acid, which are essential for preventing osteoporosis. Regular consumption of dark tea can help prevent osteoporosis. It may also inhibit pancreatic cancer and reduce the incidence and delay the onset of breast cancer. Theanine and other compounds in dark tea protect brain cells and keep the mind alert. Additionally, the organic acids in dark tea have effective weight-loss properties. Studies on the water-soluble components of dark tea have found that it has good weight-loss effects, as well as benefits for regulating the digestive system and protecting the liver. Let’s take a closer look at the health functions of dark tea.
Health benefits of dark tea
1. Supplemental dietary nutrition
Dark tea is rich in nutrients, mainly vitamins and minerals, as well as protein, amino acids, and sugars. For residents of northwestern regions who primarily consume beef, mutton, and cheese and lack vegetables and fruits in their diet, long-term consumption of Hunan dark tea is an important source of essential minerals and vitamins. It is known as the “tea of life.”
2. Aids digestion and cuts grease
Caffeine, vitamins, amino acids, and phospholipids in dark tea help with digestion and regulate fat metabolism. The stimulating effect of caffeine increases gastric juice secretion, thereby improving appetite and aiding digestion. Japanese scholars have scientifically confirmed that dark tea has strong effects in cutting grease and promoting digestion. This is why meat-eating populations especially enjoy this tea.
The diet of ethnic minorities in northwestern China consists mainly of beef, mutton, and cheese. Hence the saying, “Better to go three days without food than one day without tea,” which is closely related to tea’s ability to “remove grease” and “cut through荤腥 (rich, fatty foods).”
In addition, dark tea improves the intestinal microbial environment and has a soothing effect on the stomach and intestines. In Chinese folk tradition, aged dark tea is used to treat bloating, dysentery, and indigestion.
3. Lowers fat, aids weight loss, and prevents disease
High blood lipid levels cause lipids to deposit on blood vessel walls, leading to atherosclerosis and thrombosis. Dark tea effectively degrades fats, resists blood clotting, promotes fibrinolysis, and significantly inhibits platelet aggregation. It also relaxes blood vessel walls and increases effective vessel diameter, thereby inhibiting the formation of atherosclerotic plaques in the aorta and coronary arteries. This helps lower blood pressure, soften blood vessels, and prevent cardiovascular disease. The abundant tea polysaccharides in dark tea reduce blood lipids and peroxides. From May 1990 to May 1991, the Chinese People’s Liberation Army General Hospital observed 55 elderly patients with hyperlipidemia among 155 retirees at a sanatorium. After drinking dark tea continuously for 180 days (3 grams per day), 50 of those who consumed dark tea showed significant decreases in blood lipid levels and blood peroxide activity.
Epidemiological surveys conducted in major Fu brick tea consuming areas such as Xinjiang, Inner Mongolia, and Qinghai show that long-term consumption of dark tea effectively regulates blood lipids, blood sugar, blood pressure, and vascular sclerosis, and helps control body weight and shape.
4. Antioxidant and anti-aging
According to the free radical theory of aging, under normal physiological conditions, free radicals in the human body are constantly produced and eliminated, maintaining a balance. Dark tea is rich in antioxidants such as catechins, tea pigments, flavonoids, vitamin C, vitamin E, and beta-carotene, as well as trace elements with antioxidant effects like zinc, manganese, copper (components of SOD), and selenium (component of GSHPX). Catechins, theaflavins, theanine, tea polysaccharides, and especially the abundant complex flavonoids in dark tea have free-radical-scavenging abilities, thus providing antioxidant and anti-aging effects.
5. Anti-cancer and anti-mutation
Cancer is one of the diseases with the highest mortality rates in the world today. Since the late 1970s, scientists worldwide have discovered that tea or tea extracts inhibit the occurrence of various cancers. Hunan Agricultural University conducted high-throughput screening of dark tea using modern drug screening technology on the SGC7901 tumor cell model, confirming that dark tea significantly inhibits tumor cells.
6. Lowers blood pressure
Tea has long been known to lower blood pressure. Recently, Japanese reports indicate that the unique amino acid theanine in tea inhibits blood pressure elevation by activating dopaminergic neurons. Additionally, caffeine and catechins in tea relax blood vessel walls, increase effective vessel diameter, and lower blood pressure through vasodilation.
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