If you don’t decrease your calories, and if you eat as much as you want – a low carbohydrate diet will not help you lose weight. If you eat all you want of steaks and ribs and cheese and nuts and omelets and salad dressing – you’ll probably gain weight on a low carb diet. Even by limiting your carbohydrate intake to 10-20 grams per feeding, the magic numbers for weight loss – you can still gain weight (and a lot of weight) on a low carb diet, by overdoing your calories. The big lie in the diet world, is that you can eat as much as you want on a low carb diet, and lose weight.