A SIMPLE KETOGENIC DIET A Beginner's Complete Guide to Keto Eating & Blood Level Monitoring You don't need a PhD in nutrition to succeed on keto. This guide strips everything back to the fundamentals — what to eat, what to avoid, and how to know with confidence that your body has made the metabolic switch. Thousands of people have transformed their health with this approach, and you can too. Let's keep it simple and get you started. 1. What Is the Ketogenic Diet? The ketogenic (keto) diet is a very low-carbohydrate, high-fat eating plan that shifts your body's primary fuel source from glucose (sugar) to ketones — molecules your liver produces from fat. This metabolic state is called ketosis, and it's where the magic happens. When you drastically reduce carbohydrates to under 20–50 grams per day, your body depletes its glucose reserves within 2–3 days and begins burning stored fat for energy. The result: steady energy, reduced hunger, and ...