Simply put, weight lost through suffering comes back. While there's no doubt that weight management and healthful living require effort, if the efforts required include regularly facing off with hunger, blindly denying yourself foods you enjoy, or following a dietary regime that doesn't fit your tastes, they're not going to last.
Whatever program or diet you undertake, the most important predictor of your likelihood of long-term success is being able to answer, "yes" to the question, "could you happily live this way for the rest of your life", with the key word there being, "happily".
