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SESK: Stuff Everyone Should Know · sesk.info/diab-a1c-two-three-months

An A1C test shows your average blood sugar over about how long?

The past 2 to 3 months.

  1. The past 2 to 3 months ✔
  2. The past 24 hours
  3. The past 2 to 3 years

Why: Sugar in the blood sticks to hemoglobin in red blood cells. Those cells are replaced about every three months, so A1C shows a long-term average instead of one moment.

Huh, didn't know that: A1C is also called hemoglobin A1C or HbA1c.

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Sources

  1. ADA, Understanding A1C https://diabetes.org/about-diabetes/a1c
  2. ADA, Understanding A1C https://diabetes.org/about-diabetes/a1c

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