I know what he means, but it's just an imaginary experiment. If we can control the person 24/7, provide him with reasonable diet/exercise program, but strictly

I know what he means, but it's just an imaginary experiment. If we can control the person 24/7, provide him with reasonable diet/exercise program, but strictly control his food/liquid intake so that his body mass decreases for a mere 50g per day. How likely would it be for the person to die from starvation while maintaining the huge percentage of body fat? I personally think it would be highly unlikely, but that's just a guess.