There are lots of numbers associated with the idea of trying to change your body size or composition. The obvious numbers like the number of the scale, your waist measurement, the size of your pants or your body fat percentage. There are the numbers associated with a best guess for how much of what food you should eat, i.e. 800 grams of fruits and vegetables or 13 ounces of protein (at least for a woman of my size.) And there are numbers connected to how you move your body: how many hours you should strive for per day, how many steps you should take, how many reps you should "leave in the tank" during a weight lifting session. There are also other numbers, including "the facts." For example: 80% of Americans aren't eating the recommended amount of fruits and vegetables. 70% of Americans are overweight or obese. And, my new favorite fact: "98% of all keto diets fail," which was what Dr. Robert Cywes, the Carb Addiction Doctor, who advocates for a...