I think it's relativerly easy to get back from the 'overweight' category without lasting damage. Your skin is ok and you're able to get a good looking body back. But if you're obese or - as it is often the case now - morbidly obese, your body and skin have suffered so much damage that there is little hope to get back to a completely normal body. Not saying that it isn't worth trying, of course, but it's a reality.