Fuel your body makes from fat when glucose is scarce; high levels can be dangerous.
When cells can't get enough glucose, the liver breaks down fat into ketones as an alternative fuel. Light ketosis happens with fasting or low-carb eating and is usually harmless.
But in diabetes, very high glucose plus rising ketones can signal diabetic ketoacidosis (DKA), a medical emergency. If you're advised to check for ketones when glucose runs high, follow that guidance promptly.
Learn what the reference numbers mean, then track your own logged readings and their share in your selected range. GMI and estimated A1C are withheld when source and coverage are unvalidated.
Educational content maintained by the SteadyRange. Source and terminology check: September 30, 2026. Independent clinical review is pending; no clinical reviewer credentials are claimed.