Normally most of the copper in your blood is carried by a protein called ceruloplasmin. Adults have 50 to 120 milligrams (mg) of copper in their body, mostly in muscle and the liver. Copper helps make melanin, bone, and connective tissue. It also helps with many other processes in your body. Unlike most animals on earth, whose blood is iron-based, some mollusks (Mollusca) and arthropods (Arthropoda) have copper–based blood. While the best-known example of an arthropod with copper–based blood is the horseshoe crab, a number of other arthropods have blue blood. Copper and iron are essential elements in the human organism, and recent enlightening research has given increased evidence of their importance in the blood stream. https://jamanetwork.com/journals/jamainternalmedicine/article-abstract/549306 In our first experiments, nine years ago, on the iron content of whole blood, we found it necessary to establish a … Continue reading Is Rh negative blood actually copper-based?