I've been using Copper for about 2 weeks now and I've noticed a marked difference in my energy level and now normal heart rate. I couldn't go on with my ATDs cause of the harsh side effects and don't want to resort to radioactive or surgery treatment so this seems to be working for me. I also take mineral water every day. I'm hoping this will balance everything inside and will get tests soon to see if these improved my T3 and T4. Any suggestions on dosages and strategies for a more solid recovery are very much welcome.