My wife tried a copper bracelet, since she had seen her mum use one. The next day the hand with the bracelet on it was swollen and sore. I don't know what happened. The ACV & baking soda and the Magnesium Citrate work best for her. She also takes Potassium, Boron and juices daily. She also eliminated wheat and dairy from her diet. Copper? I can't even think of a reason for it doing anything. Maybe heavy metal poisoning?