c158, I'd ask for a serum pth. Pth fluctuates throughout the day. Baseline is usually around 8am and I'd have the draw at that time.
You might want to listen to https://www.youtube.com/watch I like this presenter because he speaks quickly and holds some of the same opinion that I do, but you have to question everything you hear from anyone. And I as I always caution with Dr. Lucas because he is a good salesman, don't buy anything.
Is your doctor (endocrinologist?) recommending medication?
The endocrinologist I see didn't make me ask for pth, he orders them for all of his osteoporosis patients. I think you should have the pth test it is causing low wrist mineral content or not, so that you don't risk more bone loss.