Hello, I am 69 years old,175 lbs, 5 3 , just retired and feeling great. Today I went to donate blood and they checked my hemoglobin. It tested 10.2, we retested and got 10.6, so I was rejected. Two months ago I tested 12.6. What could be causing this low iron level and what could I do to improve this level? Thanks for your response. Jeanne