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Vitamin D (Calciferol, Calcitriol)

by Georgina Cornwall, PhD
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    Then we move on to our final fat soluble vitamin. Vitamin D, calciferol or calcitriol. Vitamin D has a number of different forms. The vitamin that we take as a supplement will generally be in the D3 form. And it is involved in metabolic pathways that involve increase in calcium absorption and stimulating osteoblasts. So that they deposit calcium into the bones. So here we can see the pathway that the biggest key here I can say is, it relies on the sun to take a cholesterol and turn it into vitamin D3. So the sun is ultimately our best source of vitamin D3. You can see that's along the way there are various conversions to make D3 into it's active form that we can use which is the calcitriol. And that is use in all the different processes that we have discussed. Also I want to bring to light and as it's with the sun, the same cholesterol molecule in D3 pathway leads to the manufacture of many of our steroid hormones. So stay in the sun. So what's sorts of things can lead to a vitamin D deficiency. Well, the first one that we may not jump to the conclusion of is breast milk and no sunshine. Because unlike cows milk which we fortify, breast milk does not actually contain adequate vitamin D on it's own. And so sun exposure is critical. So make sure that your patient's children get plenty of sun along with the breast milk. And the next thing that we can see from a deficiency is either in children or in adults. Rickets is a symptom we don't see it much in the United States. But results from a vitamin D deficiency. Because we see less calcification of the bones. On occasion we'll see...

    About the Lecture

    The lecture Vitamin D (Calciferol, Calcitriol) by Georgina Cornwall, PhD is from the course Nutrition. It contains the following chapters:

    • Vitamin D - Calciferol, Calcitriol
    • Summary: Fat Soluble Vitamins

    Author of lecture Vitamin D (Calciferol, Calcitriol)

     Georgina Cornwall, PhD

    Georgina Cornwall, PhD


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