My blood test shows low hemoglobin, low iron and low ferritin. My hemotologist gave me intravenous iron two years ago for the same symptoms. I had a capsule endoscopy, a colonoscopy and an endoscopy and all were negative. I have been diagnosed with vitamin D deficiency recently. I have Dupuytrens Contracture and have had blood pressure on the low side for years. My hemotologist says, "You're bleeding from somewhere." He's scheduled another intravenous IV of iron. My question: Could my anemia be from vitamin B-12 deficiency.