Why isn’t Wolverine obese? His body regenerates so if he ever tried to lose weight, it would regenerate.
He is in the Planet X timeline of the future, when his regeneration has slowed down due to aging.
Fat cells don’t go anywhere when you lose weight. They just stop holding as many lipids. And regeneration seems like it’d burn a lot of calories.
Fat cells aren’t immortal so they die. Normal calorie ups and downs are handled by lipid increase and decrease. But going calorie negative for long enough makes the body break down muscle and fat cells. Your cells don’t just shrink- they are gone.
However the number of fat cells you have tends to be set at adolescence so the body will remake fat cells when it has a calorie surplus.
Technically true but irrelevant to the point made, no? Cell count doesn’t significantly impact “fatness” so wolverine regenerating his fat cells won’t really impact his weight.