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From Buffalo, New York, USA:

What effect will donating blood every eight weeks have on A1c results? My results are consistently lower than I expect them to be.


If red blood cell survival is less than the usual 120 days, which could occur with frequent phlebotomy, the A1c could be lowered falsely. I would suggest you withhold from donating, if possible, and see if there is an effect.


Original posting 17 Nov 2007
Posted to A1c, Glycohemoglobin, HgbA1c and Other


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Last Updated: Tuesday April 06, 2010 15:10:14
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