Effective is effective, but the effect is not obvious. And it will take a long time. As mentioned above, reasonable eating habits and proper exercise can help you lose weight healthily and effectively. Well, if you want to lose weight, I suggest you drink a cup of tea every night. Although it is not good for sleep, it is very light for weight loss. You should drink it continuously every day.

If you think my answer is ok, please give me extra points. I just applied for a Baidu account, and I haven't got any points yet. So sad!