Dose anyone know if a low b12 level has anythihng to do with arthrtis? I went to see a hematolosist today. They did some blood work on me and they must of forgot to do a clotting test. She kept asking me about RA in my family. My b12 level is low and I will starting shots in 2 weeks. She wants to do more blood work. I was just wondering why she was so concernd about blood clotting. She insisited my blood results were fine.