I slow cooked a pork roast for 8 hours, but when I sliced it, I saw this weird shiny green and rainbow reflection on the meat fibers. It looks like gasoline on water. Did the meat go bad?

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Texture: Fresh pork should be firm and slightly moist—not slimy or sticky.

Color: Cooked pork should appear white to light pink. Raw pork should be pinkish-red. Gray or green tones may indicate spoilage.

7. Does Slow Cooking for 8 Hours Increase Food Poisoning Risk?
Slow cooking can be safe, provided the meat reaches a safe internal temperature. Food safety concerns arise if meat remains too long in the “danger zone” (40°F–140°F / 4°C–60°C), where bacteria multiply rapidly.

A properly functioning slow cooker will eventually bring food to a safe temperature. Using a meat thermometer is the best way to confirm doneness.

8. How Storage, Packaging, and Brining Affect the Rainbow Shine