Earlier quoted context omitted.
I heard that 2/3 of the weight loss is muscle, do you find that to be the case?
this is likely incorrect because people are confusing lean body weight loss for muscle loss. lean body weight loss does not mean only muscle loss. lean weight includes non muscle like skin, organs, etc.
This can lead to the body to break down muscle tissue to obtain protein for energy which could lead to a loss of lean muscle mass
However, maintaining regular exercise and consuming sufficient protein can help to minimize the impact of lean muscle mass loss