At the end of Bakemonogatari episode 2, Araragi claimed his normal weight is supposed to be 55kgs, but on the weighing scale, it showed 100kgs. He then said something about the crab and the episode ended. There was no sign as to what happened to the weight difference in the entire series.
I've only watched Bakemonogatari, so is there an explanation or something in the later series? Or the anime has mistaken it or ignored the fact of Araragi overweight?