The flabbiness, shape and texture of your stomach matters WAY more when it comes to whether or not you get loose skin than your diet (CICO vs fasting/no carbs)

man shut yo goofy ass up you just lazy not special

the only thing that matters for loose skin is if your body actually produced NEW skin or not
some people are fat and their skin is just stretched a bit and can bounce right back
some people are fat and their skin gets microtears and produces new skin to keep up with the demand of fat

you will never naturally remove newly created skin