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Vitamin D is found in many dietary sources such as fish eggs fortified milk and cod liver oil. The sun also contributes significantly to the daily production of vitamin D and as little as 10 minutes of exposure is thought to be enough to prevent deficiencies. The term "vitamin D" refers to several different forms of this vitamin. Two forms are important in humans: ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3). Vitamin D2 is synthesized by plants. Vitamin D3 is synthesized by humans in the skin when it is exposed to ultraviolet-B (UVB) rays from sunlight. Foods may be fortified with vitamin D2 or D3. The major biologic function of vitamin D is to maintain normal blood levels of calcium and phosphorus. Vitamin D aids in the absorption of calcium helping to form and maintain strong bones. Recently research also suggests vitamin D may provide protection from osteoporosis hypertension (high blood pressure) cancer and several autoimmune diseases. Rickets and osteomalacia are classic vitamin D deficiency diseases. In children vitamin D deficiency causes rickets which results in skeletal deformities. In adults vitamin D deficiency can lead to osteomalacia which results in muscular weakness in addition to weak bones. Populations who may be at a high risk for vitamin D deficiencies include the elderly obese individuals exclusively breastfed infants and those who have limited sun exposure. Also individuals who have fat malabsorption syndromes (e.g. cystic fibrosis) or inflammatory bowel disease (e.g. Crohn's disease) are at risk.

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Product Type: Prescription Drugs 12

ONE-ALPHA ( AlfaD Generic Alfacalcidol )

ONE-ALPHA (AlfaD Generic Alfacalcidol)

AlfaD Generic Alfacalcidol

0.25mcg Caps AlfaD Generic Alfacalcidol ONE-ALPHA

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Pharmacy: Dozens of patents for name-brand drugs are due to expire within the next 14 months, and generic drugs will replace some of the most popular and widely advertised drugs used today. For millions of people worldwide, this means switching from familiar brands like Lipitor to generic equivalents. How will this affect drug companies, and what will be the impact on people who depend on expensive prescription medication? Here, a brief guide: Which drugs are scheduled to go generic? Some real blockbusters. "In the next two years, six of the 10 top-selling drugs will lose their patents," says Chris Woolston in the Los Angeles Times. Lipitor, the world's best-selling drug, which is used to lower cholesterol, will be available as a generic in November of this year. Another best-seller, the blood thinner Plavix, will lose its patent in May 2012. Other well-known drugs with expiring patents include the arthritis treatment Enbrel, the anti-psychotic Zyprexa, as well as drugs for bipolar disorder, HIV, high cholesterol, and other conditions.