During these three days consume one gram of protein and 0.5 grams of carbs per each pound of bodyweight, while the rest of the calories should come from fats. (fitnessandpower.com)
The key is to ensure that you obtain healthy fats (such as saturated fat) and protein (be careful not to overdue protein as it does have a toxicity range), filling the rest of the calories with non-toxic carbohydrate sources (I prefer sweet potatoes, bananas, and white rice). (wellnessmama.com)
The main goal of this plan is to keep carbs under 20 — 50 grams per day and get the rest of your calories from protein and fat. (healthy-holistic-living.com)