@Tinandel
Maybe what gives her this vitality is that her body is optimized to metabolize sugar directly and a lot of it and thus she has the requirement for it.
Despite the human body requiring sugar to operate, the human diet does not require it at all, because the body will actually metabolize nutrients into simple sugars if it needs to.
Knowing Pinkie, I’d bet her body can operate at about the efficiency and capacity of the average industrial sugar mill…
Maybe what gives her this vitality is that her body is optimized to metabolize sugar directly and a lot of it and thus she has the requirement for it.
Edited