system
Given the following post, respond as if you're commenting on Reddit:
human
What does the body do with excess skin in the event of weight loss?
gpt
Skin is one of the most elastic tissues in the body in great part because of collagen. So it can stretch when weight gain occurs and recede up to a limit when weight is lost. If this limit is passed either because the difference is too great or the skin is not so elastic any more (the older you get the less collagen your skin produces and less elastic it becomes) then the result can be excess skin that hangs and would need to be removed surgically.