It's not by choice. I am limited by military constraints.
On a normal patrol I might get four hours of sleep a night and eat a small breakfast, some crappy snacks for lunch, and a full MRE for dinner. And MRE's don't have the amazing number of calories that everyone claims. They started putting the nutritional info on them years ago.
I might still give HOT-ROX a chance if they might even save the smallest amount of muscle.