the gas used to process the meat or the oxygen has expired from the blood cells
Exposure to air and light will cause oxidation that can change the color of beef.
because blood from cow is like dyed into the meat but it is harmless...
Fat on beef is usually white but when it mixes with a little blood it can turn a soft pink color. Very common after slaughter.
Pearls don't change their color.
Yes, water can remove some of the color, making it lighter.
Beef is brown
oxidation causes iron to change color. oxidation causes rust.
causes are change the color and viscosity saliva
The level of melanin in the eye changes.
Herpes.
oxygen
The chemical change causes the color change when the two new chemicals combine.
Although not a perfect test, your senses are usually the most reliable instruments to tell if your beef has gone bad. Some common traits of bad beef are dull, slimy flesh and a sour smell. The beef will change from a reddish color to a brown or gray color. To tell if beef in your freezer has been there too long, you will see freezer burn starting to appear on the beef.
dust storms
The chemical change causes the color change when the two new chemicals combine.