If you are building muscle, you will most likely see a slight weight gain. Do not fret, if you are gaining weight and seeing muscle gains, that is a good thing.
A multitude Of things -1.unhealthy eating2.Slow metabolism
it slows down your metabolism.
actually adderall is an amphetamine. and one of the side effects of it are loss of apatite which leads to weight LOSS not gain
can or not