If it is to reduce fat, it is impossible. First of all, what is your body fat rate? In other words, you have to find out your whole body fat content first.

Suppose you weigh 60 kg and your body fat rate can be as high as 25%, then your overall fat content is 15 kg. If you can't lose fat so quickly, there will be problems.

Even with professional guidance, you can lose 4~5 kg a month.