I'm a 23 year old female who has a lot of loose skin. my whole life, i've been in fairly good shapes . in middle school I was obese but i lost weight right after... skin was still okay. I gained about 20 lbs in 2012-2013. ive lost all that weight and have done it really slowly! It wasn't like i just dropped it. I'm very thin, not much fat and workout like crazy and STILLL have loose skin.