Hi Doctor, I'm 28 years old. Currently weighing 48kgs, height 5 ft 3". I've had massive weight loss of about 12kgs 4 yrs back by doing yoga. My skin wasn't very tight earlier as well, but now it has become saggy although I look fine it is obvious when it is felt. I have a heavier lower body compared to my shoulders and arms. Please adivce remedy for skin tightening. Thank you