Regularly drinking black tea is very good for the body. It has the effect of promoting digestion and nourishing the stomach. It also has the benefits of protecting the heart, enhancing the body's ability to resist viruses, preventing bad breath, protecting teeth, and preventing cancer. However, it is said that black tea is anti-cancer, but drinking black tea can also cause cancer. Why? The data on "Tea and Cancer Disease Research" published by Case Western Reserve University in the United States, the National Cancer Center in Japan, Curtin University of Science and Technology in Australia and other institutions show that the incidence rate of people who drink tea regularly is more than 60% lower than that of people who drink tea less often. . However, if you drink tea incorrectly, it will cause cancer.
1. Hot tea causes cancer
The World Health Organization has long listed hot drinks over 65°C as a 2A carcinogen! This is because when drinking hot drinks, it will burn our esophageal mucosa, and long-term repeated scalding will cause the esophagus to continuously repair and re-injury itself, which will promote cancerous cells and induce cancer! No matter how good black tea is, you need to drink it in moderation. It is recommended that you drink tea after meals, drink tea slowly, and drink tea in small sips; in addition, the inlet temperature should be controlled, and the temperature of tea should not exceed 65 degrees Celsius to avoid damage to the esophageal mucosa and gastric mucosa, and even increase esophageal cancer. probability of disease.
2. Strong tea causes cancer
Strong tea refers to the fact that there are too many tea leaves and less water, resulting in a bitter taste of the tea, and the tea soup is thick and opaque. After a long time, the strong tea appears tea leaves with tea oil. If you drink more than 12 grams of tea a day, and the water for making tea is no more than 600 ml, then you are drinking strong tea! The concentration of caffeine and theophylline in strong tea is very high, which may cause accelerated gastric peristalsis, hypersecretion of gastric parietal cells, stimulate gastric acid secretion, lead to increased stimulation of gastric mucosa by gastric acid, and even lead to gastric ulcers and other stomach problems! Increased stomach acid and stomach ulcers increase the risk of stomach cancer!
3. Black tea to prevent ovarian cancer
Studies have shown that two cups of black tea a day can actually reduce the risk of ovarian cancer by 30%! Black tea polyphenols have potential as adjuvant therapy for advanced ovarian cancer. Not only that, the flavonoids flavonols and flavanones in black tea can defend against free radical diseases that are harmful to cells and enhance immunity, thereby preventing cancer. However, black tea is high in oxalate, and there is evidence that regular consumption can increase the concentration of oxalate in the urine, so it is recommended that people at risk of kidney stones give up drinking black tea. In short, drinking black tea is anti-cancer and will not get cancer, but it must be drunk correctly.