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For many people with diabetes, a blood sugar below what number counts as low?

70 mg/dL. Ask your care team what counts as low for you.

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  1. 70 mg/dL ✔
  2. 120 mg/dL
  3. 40 mg/dL

Why: For many people, low blood sugar, called hypoglycemia, means under 70 mg/dL. Your care team may give you a different number, so ask what counts as low for you.

Huh, didn't know that: Lows are common with type 1 diabetes and with type 2 when taking insulin or some other diabetes medicines.

The dad joke
Why did 70 refuse to go any lower? It knew where to draw the line.
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References

Answer: 70 mg/dL. For many people, low blood sugar, called hypoglycemia, means under 70 mg/dL. Your care team may give you a different number, so ask what counts as low for you.

  1. NIDDK, Low Blood Glucose (Hypoglycemia) www.niddk.nih.gov/health-information/diabetes/overview/preventing-problems/low-blood-glucose-hypoglycemia
    For many people with diabetes, this means a blood glucose reading lower than 70 milligrams per deciliter (mg/dL).
    Checked 2026-10-08.

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Test yourself in the game

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