I(my son)am new to ITP. He is still undergoing treatments ect. I don't know about vitamins, but I do know that anything with a blood thinning agent is to be avoided WHEN you have ITP. Motrin, asprin and alot of cold/cough meds. have them.I am trying some natural things with my son right now. Just started them yesterday. I have talked to 1 Dr. and our chiropractor about the vitamins/suppliments and none of them said that he couldn't take them. Now, these are the ones you would find at your healthfood store, not the "exotic" ones from Vietnam or China and places like that. I have also looked into Hoeopathy a little, but haven't tried that yet.I know I didn't give you alot of info, but I hope I helped some! SO great that she is in remission

I wish you all the best and continued health!