Go Reinhold – more vital analysis to balance the anti-science of the D-detractors. If only all researchers had your ability and your insight. Note his repeated engineering inferences early on – this is indeed engineering, and it’s about time – medical science has had decades to understand the mechanisms of 25(OH)D in the physiology, and generally the benefits of attaining evolutionary levels have been suppressed if anything (can’t understand why?). In any case, human population health has suffered greatly as a result.