Body fat content needs to be measured with special instruments, and photos can also be sent for visual inspection. Only height and weight cannot be calculated.

You have lost weight. I suggest you eat muscle-building powder first and buy 9 kg. Basically, you can gain weight 15 kg in three months. Then take protein powder. What you said is 80 powder, which belongs to protein powder, and the effect is good. But if the money is not bad, I still recommend you to buy a big barrel of whey protein powder.