a lot of times, they're just fried out in their own fat. beware though, you're getting the absolute cheapest cut from the worst, conventionally raised pigs... oxidation may indeed run rampant. often you open these, and can smell it.
"dean ornish and dr. davis think the palmitic acid our bodies use for fuel while we sleep is poison if we eat it. zero-carbers like charles washington think the oldest fuel in our evolutionary history – glucose - used by organisms a billion years ago and without which the brains of modern mammals cannot survive for more than a few minutes – is an unnatural toxin if you eat it. both views ignore basic facts of medical physiology and defy evolutionary history." - kurt harris