Disadvantages: you will be hungry soon after drinking, and you can't drink it at night, otherwise it will affect your sleep because it contains a little caffeine.
Generally speaking, drinking tea is good, but the most important thing is to drink it in different seasons for better health. For example, you should drink some green tea or scented tea in spring and summer, and Tieguanyin can do the same, while you should drink some Pu 'er or black tea in autumn and winter, which will warm your stomach and body.