The role of vitamin D
in preventing rickets depends on its ability to increasing the
expression of Ca2þ pumps and buffers to facilitate the uptake of
Ca2þ across the intestine as part of vitamin D's role in regulating
whole body Ca2þ homoeostasis. In the case of all the other diseases
mentioned above, there is no general consensus as to how Vitamin
D might function despite the overwhelming evidence of its
important health benefits.