what is the difference between vitamin d d1 d2 d3?
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The D3 form is found in fatty animal-sourced foods, such as fish oil and egg yolk. Your skin also produces it in response to sunlight or ultraviolet light. In contrast, vitamin D2 comes from plants. Interestingly, vitamin D3 appears to be more effective at increasing levels of vitamin D in the blood.
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Vitamin D is used to treat and prevent bone disorders (such as rickets, osteomalacia). Vitamin D is made by the body when skin is exposed to sunlight. Sunscreen, protective clothing, limited exposure to sunlight, dark skin, and age may prevent getting enough vitamin D from the sun.
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Vitamin D helps your body absorb calcium. Vitamin D2 is used to treat hypoparathyroidism (decreased functioning of the parathyroid glands). Vitamin D2 is also used to treat rickets (softening of the bones caused by vitamin D deficiency) or low levels of phosphate in the blood (hypophosphatemia).
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Normal Results The normal range of vitamin D is measured as nanograms per milliliter (ng/mL). Many experts recommend a level between 20 and 40 ng/mL. Others recommend a level between 30 and 50 ng/mL.
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There are two major types of vitamin D1,2: Vitamin D2 (ergocalciferol) – which is synthesized by plants and is not produced by the human body. Vitamin D3 (cholecalciferol) – which is made in large quantities in the skin when sunlight strikes bare skin.
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Today, many countries still use the IU to measure vitamin D; 1 IU of vitamin D is equivalent to 0.025 micrograms (abbreviated as either mcg or μg) of cholecalciferol or ergocalciferol. Conversely, 1 microgram of vitamin D equals 40 IU of vitamin D.
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The recommended form of vitamin D is vitamin D3 or cholecalciferol. This is the natural form of vitamin D that your body makes from sunlight. Supplements are made from the fat of lambs' wool. However, a clinical study reported in 2008 suggested that vitamin D2 works as well as vitamin D3.
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Both types are good for bone health. Vitamin D supplements can be taken with or without food and the full amount can be taken at one time. While your body needs vitamin D to absorb calcium, you do not need to take vitamin D at the same time as a calcium supplement.
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Vitamin D2 is ergocalciferol and comes from plant-based sources. Vitamin D3 is cholecalciferol and comes from animal-based sources. Both supplements are processed in the body by the liver to 25-hydroxyvitamin D, though vitamin D3 is thought to provide higher levels of 25D.
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In people whose 25-hydroxyvitamin D (25[OH]D) is <12 ng/mL (30 nmol/L), treatment usually includes 50,000 international units (1250 micrograms) of vitamin D2 or D3 by mouth once or more per week for six to eight weeks, and then 800 to 1000 international units (20 to 25 micrograms), or more, of vitamin D3 daily ...
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Chemically, the various forms of vitamin D are secosteroids, i.e., steroids in which one of the bonds in the steroid rings is broken. The structural difference between vitamin D2 and vitamin D3 is the side chain of D2 that contains a double bond between carbons 22 and 23, and a methyl group on carbon 24.
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A: There are two different forms of vitamin D: D2 (ergocalciferol) and D3 (cholecalciferol). The prescription-strength vitamin D is ergocalciferol (Drisdol) and comes in a dose of 50,000 international units (IU), which is usually taken once a week.
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Vitamin D is not one chemical but many. The natural type is produced in the skin from a universally present form of cholesterol, 7-dehydrocholesterol. Sunlight is the key: Its ultraviolet B (UVB) energy converts the precursor to vitamin D3.
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Vitamin D and Inorganic Elements. One point of note is that adequate 25(OH)D3 is associated with improved absorption of essential elements including calcium, magnesium, iron, phosphate, zinc, and copper [12].
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One USP unit of vitamin D2 is equivalent to one International Unit (IU), and 1 mcg of vitamin D2 is equal to 40 USP Units. Each capsule contains Vitamin D (Ergocalciferol) 1.25 mg equivalent to 50,000 USP Units in an edible vegetable oil.