what is the difference in vit 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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There are two main forms of vitamin D, these are ergocalciferol (D2), which is the form produced by plants when exposed to UV light, and cholecalciferol (D3) the biologically active form produced in humans and animals when skin is exposed to sunlight.
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INTRODUCTION. Vitamin D3 is produced in the skin from 7-dehydrocholesterol by UV irradiation, which breaks the B ring to form pre-D3. Pre-D3 isomerizes to D3 or with continued UV irradiation to tachysterol and lumisterol. D3 is preferentially removed from the skin, bound to DBP.
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These contain 500mg Calcium + 400iu Vitamin D3, which is the minimum strength recommended for osteoporosis, and contains the same strength of vitamin D3 as other formulary preparations (Calcichew D3 Forte tablets, Adcal D3).
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Considerations for vegans Vitamin D2 is always suitable for vegans, but vitamin D3 can be derived from an animal source (such as sheep's wool) or lichen (a vegan-friendly source).
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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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Your doctor can order a blood test to measure your levels of vitamin D. There are two types of tests that might be ordered, but the most common is the 25-hydroxyvitamin D, known as 25(OH)D for short.
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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. The examples above are common measurements for results of these tests.
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Vitamin D2 50,000 units requires a prescription, however, Vitamin D3 50,000 units does NOT require one. However, although Vitamin D3 50,000 units does not require a prescription, it is still usually purchased from behind the pharmacy counter and may need to be ordered in.
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The biggest difference between the two on paper is in 0-60mph acceleration time. The D3 takes 9.9 seconds, while the D4 just 7.9. To drive, both offer the same levels of refinement and comfort.
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Vitamin D is added to all of them. The amount of fat is the only difference between them, and it's a big difference. Half the calories in whole milk come from fat and one-third of the calories in 2 percent milk come from fat.
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Vitamin D is a membrane antioxidant: thus Vitamin D3 (cholecalciferol) and its active metabolite 1,25-dihydroxycholecalciferol and also Vitamin D2 (ergocalciferol) and 7-dehydrocholesterol (pro-Vitamin D3) all inhibited iron-dependent liposomal lipid peroxidation.
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The two major forms are vitamin D2 and vitamin D3. Vitamin D2 (ergocalciferol) is largely human-made and added to foods, whereas vitamin D3 (cholecalciferol) is synthesized in the skin of humans from 7-dehydrocholesterol and is also consumed in the diet via the intake of animal-based foods.
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Do I need a prescription for vitamin D-oral? Vitamin D2 and D3 50000 IU are available with a prescription. Vitamin D2 and D3 400 – 5000 IU are available over-the-counter (OTC).
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Given that your body doesn't care whether it's taking more vitamin D2 or less vitamin D3—as long as it's within the recommended dose—either type could be perfectly fine if you're taking it for general health.
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The Bottom Line 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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Liquid Vitamin D3 2500 IU (62.5 mcg) is a premium, high strength formula of vitamin D3, a form that is easy for the body to use. The benefits of the "sunshine vitamin" are numerous and well documented, ranging from supporting immunity, to strong bones and healthy teeth.