減量中なの?
減量してるの?
It is necessary to lose weight.
減量は容易くない。
Why do you lose weight?
I lost 4 kilograms.
I have to lose weight, so I'm on a diet.
痩せなくちゃ
I am reducing the amount of bread for my diet.
of a person, to restrict his calorie intake in order to lose weight
of or relating to the diet