I am now almost 3 years out and I have now firmly established that any substance /activity that stimulates the adrenals causes a relapse in symptoms. I have recently upped my thyroid medication and had severe symptoms that even regular doses of copper are not really helping (Copper normally gets rid of all relapses in a day or two) I believe that besides the obvious ones like caffeine, Vitamin C and substances that directly stimulate adrenals other supplements , exercise and even some foods may cause a relapse as they may be mildly stimulatory to a very easily excitable adrenal system.