As far as the different readings, not all blood cell samples are alike because not all red
blood cells carry, if any, the same amount, if any, of excess
glucose. Take one reading at the times mentioned previously in #1 above.
4. An A1c tester is the most accurate test as it measures glucose over the past 2-3 months. Why? Quite simple, red blood cells live on average 2-3 months, excess glucose attaches to new RBC's and the A1c captures this.