How is a fad diet different than a low calorie diet?

Fad diets are diets that are usually based on eating a couple different foods, skipping meals, cutting out fat, sugar, carbs ect, it might be based on taking special pills, powders or herbs ect. They are not a healthy way to lose weight. Neither is a low calorie diet. Low calorie, fad diets, paleo, ect. are just diets that will make you lose weight while you're on the diet, but right when you go off you will start gaining weight again. The only way to stay lean is to eat a low-fat, high-carb, vegan diet. Eat tons of carbs (by carbs I mean potatoes, rice, ect.), Eat tons of fruit and veggies. And eat as much as you want, you won't get fat from putting in the right things that your bodies require. Our brain runs on carbs and fruit.