Although black tea is generally safe to drink, some people may need to limit or avoid it due to potential health risks. In some instances, black tea can increase your risk of:
Kidney stones
People prone to kidney stones or at risk for chronic kidney disease may need to watch how much tea. They drink due to black tea’s high levels of oxalates. UFABET This organic acid binds together minerals. Such as calcium, which can cause kidney stones to form.
Esophageal cancer
One study found that regularly drinking three or more mugs of piping hot tea. (above 140 degrees Fahrenheit or 60 degrees Celsius) can damage the lining of the esophagus (your food pipe). This damage increases your risk of esophageal cancer.

How much black tea should you drink?
Three seems to be the magic number when it comes to how many cups of tea to drink each day for good health. To get antioxidant benefits, stick to black, green, oolong or white tea made from the Camellia sinensis plant. You can also try kombucha, a fermented that contains probiotics.
Herbal teas offer different benefits, like chamomile for sleep, ginger for upset tummies. And peppermint for nasal congestion and colds. Hibiscus tea also has several health benefits.