I’m squeamish. Will the food have blood in it?

In some tubs of food (those containing red meat) you may see something that looks like blood, it is in fact myoglobin which is released as the food defrosts.

What the heck is myoglobin?

Myoglobin is a protein that’s stored in muscle tissues. When the meat is frozen ice crystals form in the muscle cells. When you defrost the food, the ice crystals melt and the myoglobin mixes with the water to form the reddish liquid.

Myoglobin contains lots of nutrients so mix it back into their food and serve.