Consuming carbohydrates above the strict threshold required for a ketogenic diet inherently interrupts nutritional ketosis by raising blood glucose and insulin levels, halting endogenous ketone production.
The claim states a fundamental physiological definition of a ketogenic diet, where carbohydrate restriction is the exact mechanism required to induce and maintain nutritional ketosis. Because ketosis relies on low carbohydrate availability to shift metabolism toward fat-derived ketone bodies, consuming carbohydrates inherently disrupts this state. This is a matter of basic biochemical definition and everyday consensus in nutritional science, rendering it common knowledge that requires no specific paper citation.