Black tea textbook/Black tea dictionary (New Star Publishing): Takeshi Isobuchi
Since last year, I have been going to the dentist once a month. . There is no particular treatment, but I have them cleaned, inspected, and massaged. When I went to the dentist the other day, I said, "I finally feel good after coming to the dentist's office." '' he laughed. I used to be too. I was a little depressed just thinking about going to the dentist tomorrow. However, if I continue to go there, they will clean my teeth, massage my gums, check the details, and take my time for 30 to 40 minutes. This feels great.
At the end, the teacher said, "The catechins in black tea are good for preventing colds. It's good for your gums. It's also good for preventing cavities."
I like this teacher more and more. . I have written many books about the benefits of black tea, and they have been well received.
It is also introduced in the recent books "Tea Textbook" and "Tea Dictionary" (Shinsei Publishing). . .
Please take a look! 
