I ask this because from everything I've read, 95 - 98% of people who go on a diet regain everything they lost within 5 years. I haven't seen a safe, effective way to lose more than 10 - 30 pounds permanently yet. If 10 - 30 pounds was all I needed to lose, I wouldn't worry about it. For people who need to lose more than 50 pounds, there is no safe way for them to lose it and keep it off permanently, and yo-yo dieting is worse for a person's health than being at a stable, though higher, weight. That's why diets have to state "results not typical" when showing someone who has lost massive amounts of weight (and we never hear if they've been able to safely maintain that loss for more than 5 years). I would think that if people eat a variety of foods and get a moderate amount of exercise, they would be healthier than if they repeatedly lose/gain weight through dieting.