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Which glucose range defines Level 2 hypoglycemia in ADA's system?

Below 54 mg/dL.

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  1. Below 54 mg/dL ✔
  2. 54 to 69 mg/dL
  3. 70 to 99 mg/dL

Why: ADA sorts lows into levels. Level 1 is under 70 but at least 54 mg/dL. Level 2 is under 54 mg/dL, a more serious low that needs quick action.

Huh, didn't know that: CDC also calls a reading below 54 mg/dL severe low blood sugar.

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References

Answer: Below 54 mg/dL. ADA sorts lows into levels. Level 1 is under 70 but at least 54 mg/dL. Level 2 is under 54 mg/dL, a more serious low that needs quick action.

  1. ADA Standards of Care in Diabetes 2026, Section 6: Glycemic Goals, Hypoglycemia, and Hyperglycemic Crises pmc.ncbi.nlm.nih.gov/articles/PMC12690178
    Glucose <54 mg/dL (<3.0 mmol/L)
    Checked 2026-10-09.
  2. CDC: Low Blood Sugar (Hypoglycemia) www.cdc.gov/diabetes/about/low-blood-sugar-hypoglycemia.html
    Severe low blood sugar is below 54 mg/dL.
    Checked 2026-10-09.

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