Nutrition · Metabolic health Key takeaways -------------------- - Nutritional ketosis is a defined, measurable metabolic state: blood β-hydroxybutyrate between roughly 0.5 and 3.0 mmol/L. - It occurs when carbohydrate intake is low enough for the liver to convert fat into ketone bodies, which fuel the brain and muscles. - It is physiologically distinct from diabetic ketoacidosis, a medical emergency involving ketone concentrations several times higher alongside high blo