26+ Black Tea Benefits And Disadvantages Background. Although considered a healthy polyphenol, too much tannic acid can cause problems like nausea if consumed on an empty stomach. Black tea contains polyphenols, which are also antioxidants that help block dna damage associated with tobacco or other toxic chemicals.
While green tea is unfermented and black tea fully fermented, oolong lies in between the two regarding the fermentation process, and also on the caffeine spectrum.
Tannic acid can also interfere with the absorpt. Aside from water, black tea is the most consumed beverage in the world.itís stronger in flavor and contains more caffeine than other teas, but less caffeine. I suppose it divides between black tea, or indian tea as we call it in england, and china tea. Although black tea does come with a few potential disadvantages, there's more evidence that shows its benefits, even if they're not fully understood.