But the glycated hemoglobin in our blood is also “directly proportional to the concentration of glucose in our blood” and “represents integrated values for glucose over the preceding 8 to 12 weeks.” Most people seem to think that our levels at any time during this two to three month period are equal. But they aren’t.
“More recent values,” the book continues, “provide a larger contribution than earlier values.” How much more? “The plasma glucose in the preceding 1 month determines 50% of the HbA1C, whereas days 60 to 120 determine only 25%.” This is the key statement and the one that prompted me to change my testing strategy.” Note: David tests his A1c on a monthly basis.” If you missed reading his blog, you may want to read it. I did leave out some page references that were not adding meaning.