Once you have lost all the weight you need or want to, if you have been doing low carb you will have to get extra calories from fat (preferably monounsaturated), to avoid losing further weight. Most standard diets suggest 50% cals from carbs. If you drop that to, say 20% cals from carbs ie 100g carbs = 400 cals. (assuming you are a person eating 2000 cals per day, you then have to make up the missing 30% cals from fat. 100 g carbs per day is often cited on here as the amount low carbers eat. That means that once you go on to low carbs with high fat to make up the missing calories, you will be eating a massive 60% of your cals from fat. Isn't that nauseating? And isn't it very bad for your health even if the extra percentage comes from monounsaturated fats? Can the average body deal with such a whopping amount of fat?