| Name | Info | Provider | Link |
|---|---|---|---|
| Vitamin D | free resource | MedlinePlus Health Information | https://medlineplus.gov/vitamind.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=2309575.ui | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/jbmr/article-lookup/doi/10.1002/jbmr.5650050105 |