Is there any harm in replacing water with tea every day?

1. Tea will have tea stains (toothpaste can be perfectly solved, tea set tea stains directly coated with toothpaste, wipe it, instantly bright), brush your teeth very carefully, otherwise there will be tea stains between the teeth (my mother is) 2. Engage in frequent drinking tea + smoking for a long time, that tooth stain basically has to be washed, yellow and black 3. Tea is very "astringent", A large amount of long-term use will lead to constipation 4. The stomach will become extremely fragile, because tea will promote digestion, hunger quickly, drinking tea on an empty stomach is more difficult to top 5. For office workers, brewing tea is very troublesome, you need to use tea sets, otherwise you can't rush out of the soul ~ (not forced) soaked for a long time bitter, brewed less tasteless, cold and not delicious, but also easy to diarrhea harm but not to say, the dose to talk about poison, moderate drinking is indeed good for the body, single cong tea, green tea, black tea, etc., each has its own benefits, but instead of water is too exaggerated, The main thing is that the stomach cannot stand it. According to my hometown, tea is an antidote, and taking medicine when sick will reduce the efficacy of medicine. So much for hahahaha