Replied by Ted (Bangkok, Thailand) on 08/17/2011
You should have your mineral status checked, like hair mineral analysis. The one mineral that I have found to helped is magnesium, the other is the fungus issue or viral, is infecting your thyroid glands. The condition can swing easily from hyperthyroid to hypothyroid very easily it has to do with fungus and mineral imbalance. You're right in selenium supplements, but magnesium will slow down the heart rate. Too much phosphates in the diet can also do it. it is found in meats but also fungus loves phosphates and thrives, so you can get both racing heart and adrenal fatigue. Things that will slow down metabolism is 1 or 2 mg of lithium carbonate, B3 niacinamide and B1. Check you copper zinc ratio it is abnormal. The best I could say is to get hair mineral analysis. Too much selenium without vitamin E will create problems.
Ted