Hey, jroc:
The scientific literature appears to support the idea that inflammation and not calcium deficiency plays a key role in both depression and bone demineralisation associated with AS. Reducing inflammation through medications, diet or lifestyle are likely to improve these parameters.
I think the problem is yet more complex.
But I do agree that inflammation does play a key role in depression.
The problem I have with measuring serum calcium is how much attention is paid to bioavailable calcium ions versus complexed calcium: Consider You can measure calcium in the blood, but do not know where it came from or where it is going; is more of it on its way OUT having come from bone or on its way IN from supplementation or food sources.
When I was trying to decide upon the best supplementation approach, calcium was of primary interest and I found various sources that promoted the idea that this mineral should be taken on an empty (acid) stomach (to properly ionize it) and also not taken with green vegetables (due to forming oxylate compounds) or grains, either for a similar reason.
But my opinion on depression linked to calcium only comes out of feedback from others, and not from any direct personal experience. There are many reasons a person with AS should supplement with calcium. But even better reasons to get out of inflammation altogether; thanks for the articles.
HEALTH,
John