I know it is largely viewed as a toxic heavy metal Copper, or Cu from here is a big player in our bodies as long as it is bound to cerroplasm, its carrier protein. A lot of people are using large doses of MSM thinking it a miracle molecule but beware it is a weak chelator of metals and may redistribute them-- not good. MSM will pull Cu from your system and from my experience and subsequent research this is ultimately counter productive. Cu plays a roll in detox enzymes and if lacking will drive cholesterol levels upward. It also plays an important role in energy production which is why I'm posting here for all to read and hopefully research further. ATP is dependent on Magnesium and Cu to be produced and when ATP is low energy levels will be as well. Cu supplementation is a two edge sword however as Zinc and Cu must be balanced- both are vital to vibrant health. In my research many who are seeking more energy look toward iron but in doing so may be doing further harm. If Cu or Zn is deficient adding Fe only worsens things- iron is toxic above needed amounts and if ferritin is over 50 you have plenty and raising it only produces more oxidative stress- increasing need for all the aforementioned minerals which have antioxidant properties.