I lived on mostly pork rinds for a week, in all the different forms - and lost weight.

Mexican lad:   "How much chicharrónes?"
Me:   "3/4 pound."
Mexican lad (noticing I was a white guy):   "You know they weigh almost nothing - that's quite a lot".
Me:   "Yes I know, I bought that much here two days ago".
Mexican Lad:   "Let me get a bigger bag."