> This is ridiculous because it lumps refined sugars in the same category as nutritious vegetables. It doesn't, though. Low carb diets focus on net carbs, whi

> This is ridiculous because it lumps refined sugars in the same category as nutritious vegetables. It doesn't, though. Low carb diets focus on net carbs, which is carbs minus dietary fiber, and guess what: nutritious vegetables have a lot of dietary fiber and a lot fewer carbohydrates than refined sugar products. An optimal low carb diet is mostly protein, vegetables and greens (especially nutrient dense ones like kale, spinach, collard greens, etc). It seems like your brother-in-law was just ill-informed about his diet. As far as a meat-centered goes, protein is the only absolutely essential macronutrient. You can live without fat and/or carbohydrates, assuming you get your other micronutrients (vitamins, electrolytes, etc). You cannot live without protein.