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www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/meat-preparation/the-color-of-meat-and-poultry/the-color-of-meat-and-poultry/ct_index

Aug 6, 2013 ... ... with oxygen leads to the formation of metmyoglobin, a pigment that turns meat brownish-red. ... These color differences do not indicate that the meat is spoiled or old. ... What causes grayish or green color on cured meats?

www.thenakedscientists.com/forum/index.php?topic=45747.0

On a few occasions, with meat from more than one supermarket I have observed prepacked refridgerated diced beef turning greeny/grey a day ...

cooking.stackexchange.com/questions/44058/green-streaks-on-raw-meat-is-it-safe

May 11, 2014 ... Where do these green streaks on the meat come from ? Is it normal and safe to cook it ? It is not really very good-looking... They appear on most ...

www.paleohacks.com/meat/how-do-you-determine-if-meat-is-bad-15974

Do you adhere to normal CW about meat freshness or are those ... Old meat tends to show visual signs of oxidation - i.e. turning green/grey.

boards.straightdope.com/sdmb/showthread.php?t=426320

Jun 25, 2007 ... Does anybody know about green spots on meat, and whether it's safe? .... I would guess turning green because the iron is changing it's ...

www.thekitchn.com/if-meat-changes-color-has-it-gone-bad-222538

Aug 19, 2015 ... This color is a result of the protein in meat called myoglobin, which turns into oxymyoglobin and produces a vivid red color when it comes into ...

www.quora.com/Why-does-beef-turn-green

Don't eat green meat. Best case scenario it makes you horribly sick for days on end. Worst case scenario you die in agony. You could eliminate ...

www.meatupdate.csiro.au/data/Chilled_meat_for_export_03-91.pdf

bright red colour, but aged meat does not hold its colour in air as well as non- aged. ... Sometimes the meat surface (and/or weep) turns deep green, and has the ...

www.theatlantic.com/health/archive/2013/02/what-causes-beef-rainbows/273534

Feb 28, 2013 ... The Internets are clogged with threads like, "Why does deli roast beef look ... since the main color created by meat diffraction gratings is green.