Suggestions for tightening lose skin.

[Calm Logic]

Another vote for fasting but seems to me like a great way to lose muscle too:

https://www.mdpi.com/2077-0383/15/2/546

"The body can use sagging skin as a protein and fuel source during prolonged fasting."

 

[CrownJewels]

My thing to fight my loose skin after my 265lbs overall weight loss ist to let the skin removed in eastern europe.
The benefit is not only not looking like a flappy something but also the removing of the fat cells in the process which leads to better success maintaining the weight loss.