Can A1C Be Wrong? 7 Causes
Seven documented causes of an inaccurate A1C, from iron deficiency to hemoglobin variants. How to spot the discordance and confirm the real number.
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Category: Diabetes Mysteries
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Anemia and A1C: The Connection
Iron-deficiency anemia makes A1C read falsely high, and other anemias make it read low. Which tests to ask for before your treatment is escalated.
High A1C but Normal Fasting Glucose: Why They Don’t Match
Normal fasting glucose with a raised A1C usually means post-meal spikes you are not measuring. How to find them and what the dawn phenomenon adds.
Low A1C but High Blood Sugar: What It Means When They Don’t Match
A low A1C alongside high readings points to shortened red blood cell survival or a test artifact. The causes, and which follow-up tests to request.
Vitamin C and A1C: Can It Skew Your Test or Lower Your Blood Sugar?
High-dose vitamin C can interfere with some A1C assays and distort your result. How much is too much, and which lab test methods are affected.