Quote Originally Posted by Medusa
. He's big on vitamins and herbs and is always mindful of good eating habits, rest, exercise, etc.

You might want to suggest that he let the doctors know of all the vitamins and herbs he has been taking. It has recently been something that our clinic regularly asks us along with asking us about all our medications. Not that it is likley that these may be in any way involved as he is young and probably not taking any medication, but just to cover all bases.