there has been a lot of hype regarding injectable b12 lately. my concern has to do with b12's ability to increase apetite. would b12 be dangerous for someone like me who has battled eating disorders in the past, especially binge eating. my cravings used to be just terrible and it took me about a year to take care of this problem, i really don't want to deal with that again. would i be better off avoiding b12?