Im not sure I understand . If you took a reading and then gave blood and then got tested 2 weeks later, the number can be different depending on what you did, eat , exercise, etc. for the 2 weeks.I went to Quest and had my A1c tested.. It was 6.1
the same day I went to give blood.
Two weeks later I had my A1c done again bt Quest..It was 5.7
Why did giving blood drop my A1c that much??
In this study the scientists measured the lifetimes of hemoglobin cells in normal people and diabetics and found that the cells of the diabetics turned over much faster--as little as 81 days, while normal people's could live up to 146 days.
They suggest that getting better control will cause the cells to live longer. But when they live for a couple extra months, they will also continue to glycate--i.e. collect the bits of sugar that are measured in the A1c test. Cells that are living longer may collect after 5 months of life the same amount of glucose a person with poor control might collect in 3 months. That doesn't mean they have the average blood sugars as the person who developed that degree of glycation in the much shorter period.