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what is the difference between calcitriol vitamin d3

A 53-year-old male asked:
Dr. Rick Kirschner
39 years experience in General Practice
D3 is bioactive form: I think you mean d2 v d3. D2 is ergocalciferol. Cholecalciferol is d3.    if your interest is in regards to a supplement, you want to take d3, since ... Read More
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A 47-year-old member asked:
Dr. Martin Fried
35 years experience in General Practice
D3 is active: Vitamin d comes in a few forms- d3 is the active form that the body needs to help absorb calcium and build strong bones. D2 is the form before d3 and ... Read More
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7 thanks
A 40-year-old member asked:
Dr. Alan Ali
Dr. Alan Ali answered
31 years experience in Psychiatry
Vit. D3: Also called cholecalciferol, is a form of vit. D, with a chemical structure similar to steroids such as cortisol & testosterone.
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1 thank
A 37-year-old male asked:
Dr. Michael Kleerekoper
50 years experience in Endocrinology
Vitamin D: Testing for vitamin D levels is superfluous for most folks. The testing is several fold more expensive than an over-the-counter bottle -- $10-20 depen ... Read More
A 36-year-old female asked:
Dr. James Goodpaster
28 years experience in Dentistry
Lab Values: Without knowing more details on the lab results it is hard to advise you. Lab results will give a range for "normal". Whether the value of "21" requi ... Read More
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1 thank
A 17-year-old female asked:
Dr. Gurmukh Singh
48 years experience in Pathology
Daily dose: It would be better to take 2000 units of vitamin D3 daily rather than taking a large dose at longer intervals. Have a healthy diet, exercise 30 minute ... Read More
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1 thank
A 45-year-old female asked:
Dr. David Brouwer
29 years experience in Internal Medicine
Vitamin D: Although there is some controversy about the cutoff of normal level of vitamin d, it is generally agreed that above 30 is a normal level. So, your le ... Read More
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2 thanks
A 42-year-old male asked:
Dr. Randy Baker
39 years experience in Holistic Medicine
Try 5000 iu/day: Most adults need to take 5-8000 iu/day to achieve optimal levels, which are 50-80. Everyone in US should take Vit D3 in fall and winter months as it ... Read More
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A 41-year-old female asked:
Dr. Christine Hom
29 years experience in Pediatrics
Not a problem: The amount of vitamin D in a multivitamin is a small daily requirement dose. If you are being prescribed a supplement for low vitamin D levels, the a ... Read More
A 58-year-old female asked:
Dr. Arthur Ciaramicoli
44 years experience in Clinical Psychology
Vitamin D3: Vitamin d3 is the most absorbable of the forms of d vitamins available. Make sure the label of your vitamin says d3, vitamin d just refers to all the ... Read More

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