First of all, drinking tea must be good for your health. If you want to drink it all day, it depends on whether this kind of tea is suitable for your constitution.

Secondly, regarding your question, Pu 'er tea does have the effect of losing weight, but Pu 'er tea must be soaked in lotus leaves to lose weight.

Third, if you simply want to lose weight by drinking tea or drugs, it won't have much effect, including the Pu 'er tea leaves you mentioned.

Fourth, if you want to lose weight, I suggest you eat on time and in quantity three times a day, don't go on a diet that day, eat less and exercise more every meal every day. I believe you will achieve the desired effect ~