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I had a two pack of thin steaks. I used one... three days ago? Four? Then had another steak, but only ate half, finishing it the following day. Did I go a day without food in there? Maybe. You'd be surprised how easy that is on the carnivore food plan. Sometimes I literally just forget to eat. It just never crosses my mind. Or... I don't want to cook, or clean, or... anything. So... I don't. And it's no skin off my nose, if maybe some weight off the middle? Sometimes.
Anyway, there was one left in the fridge. I didn't even wrap open the packaging. Just put it in the fridge. If the other steak was further along into the opened package. But, I didn't think it would be good. Sniff test, looked it over for... ANYTHING. Nope, look, touch, and smell told me it was still good.