In pregnant women without diabetes, having more hemoglobin in the blood is linked to slightly higher HbA1c levels — a marker usually tied to blood sugar — suggesting that blood cell levels might affect this test even if sugar isn't high.

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Evidence from Studies

Supporting (1)

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Glycated hemoglobin and red blood cell indices in non-diabetic pregnant women

Cross-Sectional Study

Human

2017 Sep 15

The study found that in pregnant women without diabetes, those with higher hemoglobin levels also had higher HbA1c levels, just like the claim says. This suggests that blood cell factors, not just blood sugar, can affect HbA1c.

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No contradicting evidence found

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Source Study

Glycated hemoglobin and red blood cell indices in non-diabetic pregnant women

Score: 37

DOI: 10.4081/cp.2017.999

Similar Assertions

In pregnant women without diabetes, having more red blood cells might make their blood sugar test results look higher than they really are, even if their actual sugar levels are normal.

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In pregnant women who don’t have diabetes, having denser hemoglobin in their red blood cells might be linked to slightly higher blood sugar levels over time.

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In pregnant women who don’t have diabetes, blood traits like hemoglobin and hematocrit can slightly predict their average blood sugar levels — but other traits like MCHC and PDW don’t hold up when we adjust for other factors.

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In pregnant women who don’t have diabetes, things like red blood cell size and volume don’t seem to affect their HbA1c blood test results in any meaningful way.

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HbA1c tells you how much sugar has been sticking to your blood cells over the past few months — it's like a long-term blood sugar report card.

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