10/29/2026
One night of bad sleep spikes cortisol and raises fasting glucose by 10 to 15 mg/dL. You can eat zero carbs and still see high morning numbers.
Sleep loss creates instant insulin resistance. Stop changing your diet until you fix your sleep.
Wrote up the full science here:
Discover how poor sleep impacts insulin resistance and blood sugar. Learn research-backed tips to improve sleep for prediabetes wellness.