Vitamins cause Weight Gain?

ninel

Hi all, I have low platelet counts and therefore was placed on Prednisone during my treatments. I gained some weight due to the steroids. I also take a handful of vitamins daily. I am completely done with treatment and have been weaned off the prednisone for a couple of months now.   I began excercising and have been for a couple of months now. I lost some weight, but I can't seem to lose the last 10-20 lbs.  

I know that muscle weighs more than fat, but is it at all possible that vitamins cause some weight gain??  

Thanks,

Ninel