Vitamin D was added and the results were documented
Many were random controlled clinical trials in which not even the doctor knows who gets the vitamin D (or how much)
In two cases the group was large enough (an entire country) that they just documented the without/with = before/after.
Example: Turkey found a 60X decrease in rickets after providing FREE 400 IU of vitamin D for all infants
The following table is a snapshot of the documentation as of June 3, 2012
| Health Problem | Reduction | Notes |
| Hypertension | 149 => 142 | RCT, mmHg, 2400 IU |
| Cardiovascular | 32% | Death after HF. 1000 IU |
| Diabetes T1 | 85% | 12000 kids, 2000 IU |
| Diabetes T2 | 62% | RCT, CRP reduction, 4000 IU |
| Back Pain | 95% | 5000/10000 IU |
| Influenza | 90% | RCT, 2000 IU |
| Falls | 19% | RCT, 1000 IU |
| Pregnancy risks | 50% | RCT, 4000 IU |
| Rickets | 98% | Turkey, 400 IU |
| Multiple Sclerosis | on-going RCT EVIDIMS 10000 IU | |
| Raynaud's pain | 40% | RCT, visual scale, 20000 IU avg |
| Menstrual Pain | 76% | RCT, visual scale, 7000 IU avg |
| C-section, unplanned | 50% | RCT underpowered 4000 IU |
There are over 800 Clinical Trials with Vitamin D Intervention as of May 2012
Anticipate that this table will be updated many times in 2012 and 2013 as these trials are finished and published.