As all the endocrinal glands are thightly bound to each other in performance, for me the best option was to work with both, simultanously.
My adrenals and thyroid was under par; now working pretty good. We have had some threads about it. //www.curezone.org/forums/fm.asp?i=2052238#i
About vegetarism; very few people (if any) I know manage to keep an optimal body temperature on a vegetarian diet, which is crucial for health in general, IMO. I would at least add some eggs and seafood (zinc), raw cheese, butter; to get the factor X ala Weston Price.
A hypo thyroid = a low convertion from beta carotene to vit A, for instance. http://www.westonaprice.org/health-topics/abcs-of-nutrition/vitamin-a-saga/