so i just got the surgery but my twin sister got it two years ago. Right now we are 22. When she got the surgery she weighed 250 pounds and she is now down to 130. she has some loose skin on her belly, thighs, and upper arms. It isnt so bad that she needs a tuck or anything and she looks cute in a one piece. the only bad part is her boobs which completely deflated. Basically what i am saying is , is thateven though we are in our twenties we can still have loose skin. some parts can be just so streatched taht they cant really bounce back, like placces with deep streatch marks. but exercising and toning can be helpful. but im guessing loose skin for us 20-somethings is a lot diffrent then those in thier 40's.