(1, 2, 4) Vitamin D deficiency has also been found to be intimately associated with infertility and poor pregnancy outcomes. Research has shown that Vitamin D Deficiency will exacerbate many disease conditions, including but not limited to osteoporosis, respiratory diseases, auto-immune diseases and infectious diseases. Although, the primary role of 1,25, Vit D is to help bring calcium across the GI track and into the blood, this is by far not its only role. The 25OH Vit D, which is made in the liver, will travel through the blood and when it arrives at the kidneys, 25OH Vit D will be converted to 1,25 Vit D. For this reason, this is the specific metabolite that I will measure to evaluate if you are Vitamin D Deficient.ġ,25-dihydroxy-vitamin D (1,25 Vit D): this is the "active form" of Vitamin D. Whereas, 25OH Vit D will be the "primary form of Vitamin D circulating in the blood. Holick's research (1) below, published in the New England Journal of Medicine, for a detailed list of amounts of Vit D2 and D3 found in different types of foods.Ģ5, hydroxy-vitamin D (25OH Vit D): when we synthesize cholecalciferol in the skin (in response to sunlight) and/or when we take cholecalciferol in via our diet, it will travel through the blood stream and when it arrives at the liver, it will be converted to 25OH Vit D. Many types of cheeses, yogurts, milk (both plant-based and cow's milk) fruit juices, cereals and butter and margarines are fortified with Vitamin D3. Cholecalciferol can also be obtained in the diet from foods such as: salmon, sardines, tuna, cod liver, eggs and mushrooms. Vitamin D3 (cholecalciferol): this is one form of Vitamin D which is made in the skin when exposed to sunlight. Vitamin: a substance required by the body for normal, healthy, physiological function that we either do not make at all, or that we do not make in sufficient quantity and therefore must be obtained in the diet.
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