I’m taking vitamin C and Zinc, I saw the nurse today and she said I could continue taking the vit c and zinc before and after my BA. She said if your taking multi-vitamins you should stop taking it 1 week before your BA as it contains vit E which is a blood thinner. She also said that you should not take ibruprofen/neurofen/asprin 1 week prior to your BA, as they thin your blood too! If you need to take a pain tablet you should take paracetamol only.