Hello Tmkmurphy,
Welcome to the NeuroTalk Support Groups!
I was thinking you might be interested in checking a couple of other places as well as the main PN forum that Darlene has left in her post. I know there are posts regarding Metabolic Myopathy there.
Also...
Metabolic Diseases / Mitochondrial Forum
I'm not sure how applicable the Vit D thread will be if you're Vit D sufficient but I'll leave the link to an interesting thread anyway.
New medical information on Vitamin D + videos:
There is also a search feature. You can type in keywords and find other posts and threads. There are actually quite a few throughout different forums here.
http://neurotalk.psychcentral.com/search.php
.