[karmajunkie]

Well, I can tell you that I'm on a vitamin D supplement and there's very definitely a direct benefit to it treating early osteomalacia.

[travisp]

Yes, rickets and osteomalacia (when caused by vitamin d deficiency) are both treatable with vitamin d. Randomized controlled trials clearly show this, unlike the vitamin d trials for most other things that people are pushing vitamin d for.

Everyone should probably have their blood level of vitamin d tested. Most people are not going to see dramatic changes to health from vitamin d supplementation.