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Gaia Sciences Vitamin D3 5,000 IU in Cold-Pressed Organic Olive Oil, GMO-Free, High Potency Softgels, 360 ct.

Average Customer Rating:
4.7 (Based on 77 reviews)
  • List Price:$24.99
  • Price:$14.83 & FREE Shipping
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Product Description
AN ESSENTIAL VITAMIN Vitamin D is a fat soluble vitamin that is essential for maintaining normal levels of calcium and phosphorus in the the blood. Vitamin D has other roles in the body, too, including modulation of cell growth, neuromuscular and immune function, and overall health.* VITAMIN D SOURCES Vitamin D encompasses two forms: vitamin D2, which is produced by plants, and vitamin D3, which is synthesized when human skin is exposed to the sun's ultraviolet B shortwave rays. A very limited variety of foods contain naturally occurring vitamin D; among them are salmon, mackerel, and some mushroom varieties. Foods may be additionally fortified with vitamin D; these commonly include milk and yogurt, tuna, sardines, beef, eggs, orange juice, and many breakfast cereals. Fortified foods may contain either vitamin D2 or vitamin D3. VITAMIN D ABSORPTION Vitamin D obtained from sun exposure, food, and supplements is biologically inert and must undergo two chemical processes in the body for activation. The first occurs in the liver and converts vitamin D to 25-hydroxyvitamin D [25(OH)D], also known as calcidiol. The second occurs primarily in the kidney and forms the physiologically active 1,25-dihydroxyvitamin D [1,25(OH)2D], also known as calcitriol. Vitamin D3, as cholecalciferol, is bioidentical to the vitamin D produced by the human body. Studies have shown that Vitamin D3 increases the total [25(OH)D] concentration more than vitamin D2, suggesting that vitamin D3 is more bioavailable in supplementation.*
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