Yes... Some really made it others not so much. Plus, there is damage that can't be undone. I know it first hand, I went from a BMI of 28 to a BMI of 19.6. I've stretch marks on my thighs and I'm very lucky that I don't have lose skin. I know some people who didn't lose more weight than I and still ended up with lose skin. So better don't get fat first hand...