What is Ketosis?

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Ketosis is a metabolic state where the body relies on burning fat for fuel resulting in ketones as the primary energy source instead of glucose.


  • Carbohydrate restriction to under 50g daily forces the liver to break down fat into ketones for energy use, entering nutritional ketosis.
  • Ketosis suppresses appetite, accelerates fat burning, preserves muscle, and provides mental clarity according to advocates.
  • Testing with urine strips or blood monitors tracks ketone levels. The goal is 0.5 – 3.0 mmol/L ketones.
  • Some feel fatigued, irritable, or get bad breath as the body adapts. Stay hydrated and get enough electrolytes.


  • Checking urine ketones after 3 days of low-carb, high-fat intake.
  • Adding MCT oil to coffee to raise ketone production.

Related Terms

  • Ketogenic diet, gluconeogenesis, keto-adapted, keto flu

Common Questions

  • Is ketosis dangerous? Nutritional ketosis is considered safe but monitor how you feel. Ketoacidosis is the unhealthy type.
  • How can I tell if I’m in ketosis? Check urine strips or blood meters. Symptoms like suppressed appetite and urine odor also indicate ketosis.

Do Not Confuse With

  • Glycogenesis – The conversion of glucose into glycogen for storage.
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