It's easier when one is young, as SludgePudge are now, to carry some extra poundage. When they reach Janelle's age, or even some years younger, they'll have more aches and pains than they would if they weighed less. That's just the way it seems to work. Never mind risk of hypertension, diabetes, etc., even in young people.
I've never tried vegan. What seems to work for me is lean protein, lots of vegetables, some fruit, no dairy, and no gluten.