14 min readMallory Leone Ketosis: What Is It and Is It Right For You? – Perfect Keto You might be surprised to learn that you've probably gone into ketosis before, even if you weren't on a ketogenic diet. That's because your body naturally goes into ketosis anytime it doesn't have enough glucose for fuel[*]. No glucose from carbohydrates? Your body flips into ketosis and begins burning fatty acids as fuel instead.