Ankylosing spondylitis (a type of arthritis) worse with low vitamin D
Does vitamin D affect disease severity in patients with ankylosing spondylitis?
Chinese Medical Journal 2012;125(14):2511-2515 2511
Bekir Durmus, Zuhal Altay, Ozlem Baysal and Yuksel Ersoy
A portion of table 3 shows many strong vitamin D associations with bone problems in AS

2012 PDF is attached at the bottom of this page
There are many reasons to believe that the vitamin D cofactors which benefit bone would be very helpful for AS
Here is portion of the summary table of the cofactor page as of July 2012
| Cofactor | How Much | Benefit Bone |
| Calcium | <750mg | Yes |
| Magnesium | 500mg | Yes |
| Vitamin K2 | Yes | |
| Vitamin A | maybe | |
| Boron | 5-10mg | Yes |
| Silica | Yes | |
| Strontium | Yes | |
| Zinc | Yes |
See also VitaminDWiki
Search VitaminDWiki for ankylosing spondylitis 56 items as of Feb 2013
See also web
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- Osteoporos Int. 2011 May;22(5):1431-9. Epub 2010 Jul 6
- 2011 PDF is attached at the bottom of this page