Heme Synthesis and Degradation (Metabolism) 

You ll learn the reason behind the porphyria, which are group of disorders that result from a buildup of natural chemicals that produce porphyrin in your body. Porphyrins are essential for the function of hemoglobin - a protein in your red blood cells that links to porphyrin, binds iron, and carries oxygen to your organs and tissues. High levels of porphyrins can cause significant problems.
The two most common porphyria are Acute intermittent porphyria and Porphyria cutanea Tarda