what is difference between vitamin d and d3?
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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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Vitamin D is available under the following different brand names: Drisdol, Calciferol, cholecalciferol, 1,25-Dihydroxycholecalciferol, and ergocalciferol.
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Vitamin D3, or cholecalciferol, is one of the forms of vitamin D. Both D2 and D3 need to be converted by the liver and then by the kidneys into the main form of vitamin D that circulates in your body.
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Supplements. Vitamin D supplements come as tablets, capsules or drops. Their strength is measured in both micrograms (µg or mcg) and International Units (IU). Look for those that provide vitamin D3 (cholecalciferol) rather than vitamin D2 (ergocalciferol).
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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.
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Vitamin D is a hormone the kidneys produce that controls blood calcium concentration and impacts the immune system. It is also known as calcitriol, ergocalciferol, calcidiol and cholecalciferol. Of those, calcidiol is the form doctors most commonly focus on when measuring vitamin D levels in the blood.
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When we refer to vitamin D, we are talking about Vitamin D2. Vitamin D2 and D3 are both widely used vitamin D supplements but are not the same. Vitamin D2 is ergocalciferol and comes from plant-based sources. Vitamin D3 is cholecalciferol and comes from animal-based sources.
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Vitamin D Synthesis. The epidermal layer of human skin synthesizes vitamin D when exposed to UV radiation. In the presence of sunlight, a form of vitamin D3 called cholecalciferol is synthesized from a derivative of the steroid cholesterol in the skin.
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What kind of vitamin D is best? 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.
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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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Vitamin D is a vitamin stored in the body that is needed for building and keeping strong bones. Calcitriol is used to treat or prevent certain problems that can happen with long-term kidney dialysis, such as low levels of calcium or high levels of parathyroid hormone.
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Vitamin D is a fat-soluble vitamin that plays an important role in calcium homeostasis and bone metabolism. Vitamin D deficiency can lead to osteomalacia and rickets in children and osteomalacia in adults. The fortification of milk with vitamin D in the 1930s was effective in eradicating rickets in the world.
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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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Synthesis in the Skin Vitamin D3 is synthesized in human skin from 7-dehydrocholesterol following exposure to ultraviolet B (UVB) radiation with wavelength 290 to 320 nm.
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Getting into a habit of taking your Vitamin D with a healthy breakfast is a good start. However, there's little evidence whether taking Vitamin D3 at night or in the morning is more effective. If you're not a morning person or you skip breakfast, taking your supplement in the evening with a meal is good.
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Infant: These two formulas are virtually IDENTICAL except for the following differences: 1) The “Infant” has 60 IU of vitamin D and the “Newborn” has 75 IU. This difference is practically nothing – both are more than enough vitamin D for a new baby.
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Calcitriol (1,25-dihydroxyvitamin D3), the active form of vitamin D, has a half-life of about 15 hours, while calcidiol (25-hydroxyvitamin D3) has a half-life of about 15 days.