OK I'd forgotten about this, it works for me and I was wondering if others find this to be true (some did a while back) I was reminded from another member's post (and this is just my thoughts as I'm no scientist or doctor, just curious).
I believe it's not fat but myxoedema, from extra mucin and Hyaluronic acid in the connective tissue (I even see the latter advertised for healthy wrinkle-free skin - ha!) see wiki...
en.wikipedia.org/wiki/Myxedema
It's an old fashioned test for an old fashioned disease, some areas can't be pinched e.g. the upper arm. Link to other post & video....
thyroiduk.healthunlocked.co...
Another link re. Dr W Ord's discovery (he's also on Wiki)
tuberose.com/HypothyroidSym...
Please be careful as others WILL try to make sure they can pinch you and sneakily resort to fingernails (especially if you have successfully pinched them first!) J
[picture is Adam & Eve, would you believe the snake's nickname was 'pinch me'?]