👉 Hematins are a class of proteins that play an important role in blood cell production and maintenance. They are also found in various tissues, including skin, bones, muscles, and organs. In humans, hematins can be produced by the bone marrow or by a process called erythropoiesis, which occurs during fetal development. Hematins are produced to regulate the number of red blood cells (RBCs) in the bloodstream, as well as their shape and function. Hemat