Copper, which is in bronze, reacts to acidic environments and can turn your skin green. Your body's acidity is related to your diet. Junk food, processed food, and lots of red meat will make your body acidic. The more acidic your diet and body, the more likely you are to get sick, develop cancer, etc. The bronze rings, then, can be a terrific way to gauge whether or not you need to change your diet or let you know if you might be coming down with something. Also, headaches, arthritis, joint pain, and zinc deficiency have been effectively treated with the aid of copper or brass. Hair and eye health, brain stimulation, slowing aging (it is an antioxidant), and increased iron uptake has also been linked to copper. So when you wear your brass rings, you could very well be doing your body good and might be getting a helpful indicator of your diet's wholesomeness.