You can take supplements in the B family, but during treatment I think you should only go the natural
route, or ask your Doc.
Sometimes if your Hmg goes extremely low, then cam give you a blood transfusion, or a rescue drug to raise your #s. What I've noticed lately when the #s go low, they reduce your Ribavirin. Alot of people sail thru, and with a 12 week protocol it typically doesn't happen until your near the end of treating, and then they do the watch and see approach.