(1) Vitamin D is also referred to as calciferol and can rightly be called the sunshine vitamin, since the body, in a sunny climate can manufacture this nutrient from sunshine on your skin using cholesterol from your body to do so.(2) The physiotherapist delivered vitamin D tablets (two 1.25 mg calciferol tablets initially and then one monthly for one year) to those not already taking this supplement.(3) Here's what you need to know about vitamin D ( calciferol ) - how much you need, what it does for your body, good food sources, cautions and side effects.(4) Although called a vitamin, calciferol and its products fully qualify as hormones because they are made in certain cells, carried in the blood, affect gene transcription in target cells.(5) Vitamin D, also called calciferol , is a vitamin that dissolves in the body's fat.(6) Although several chemical compounds provide vitamin D activity, only two of these substances are commonly found in the diet of animals: vitamin D 2, or calciferol , and vitamin D 3.