Yes lyme greatly lowers the magnesium level in your body. A lof of the aches and pains and headaches from lyme are caused by this low magnesium level. I have been greatly helped by taking magnesium including the elimination of heart palps. BUT, make sure it is a good brand and quality of magnesium. My dr. swears this makes a difference. I take magnesium asparate with potassium and if I don't take it, I notice a difference immediately.