I've been reading up on magnesium deficiency google it). It can mimic thyroid problems and also manifest as depression, migraines, and a variety of things. I've been taking a powdered magnesium supplement that you mix with hot water and drink like tea, and I've seen a distinct improvement in my internal mental state. The stuff is called "Natural Calm" made by Peter Gillham's Natural Vitality." It's magnesium citrate, which is easily absorbed by the body. Got it at Whole Foods. They also have a formula for moms and babies.