Vitamin D testing: Facts and VitaminDWiki Opinions
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- Fact: Many countries no longer pay for more than 1 (some not pay for even a single Vit D test)
They feel that Vit D testing is not needed except for a few conditions (Rickets, etc) Japan is an exception - Fact: Vit D tests are not very accurate
The best lab tests have accuracies and repeatabilities of +-5 ng
Low cost vitamin D Blood Tests - both in lab and at home
Many lab tests have accuracies and repeatabilities of +- 10 ng - or worse
Vitamin D deficiency of a group - 15% to 48% - Fact: Low-cost office/home Vit D tests are available around the world (not US as of 2018)
Low-cost 35 ng Y/N test by Nanospeed
Low-cost Vitamin D testers (two yes-no tests for 11 dollars) - 2024 Nanospeed
Quick, free, self test for deficiency - Fact: 3 major Vit D gene problems are not noticed by Vit D tests
~ 20% of people have poor Vit D genes
Hint that Vit D not getting to cells: Vit D related diseases run in your family
Another hint - you have one of the 40 diseases which are 2X more likely if have poor genes - Fact: A Vit D test will rarely (<1 in 1000) indicate that you are getting too much
- Opinion: If only getting a single test, wait till after supplementing with Vit D
3 months after starting a maintenance dose or 4 weeks after a loading dose
10 Most-visited pages in Test Vitamin D category
The most recent 100 items in Vitamin D Test category
- wiki page:
- Vitamin D test result can vary by 40 ng (10 reasons) – July 2024
- Endocrine Society recommends for the healthy: no Vitamin D tests, just RDA (many object) - July 2024
- Find out if you might be vitamin D deficient for free - 2 minutes, 11 questions
- Huge differences between Vitamin D test results: CLIA, LC-MS, and home – June 2024
- Testing vitamin D in urine may be possible - March 2024
- Vitamin D is increasing in Greece: testing, supplementation, and levels – Jan 2024
- Chair-side vitamin D test for 80 nmol - Sept 2023
- Vitamin D tests using smartphone, etc. - 2022
- Test Vitamin D, get a tiny dose, no benefit, conclusion: should not have tested (Australia this time) – Aug 2022
- Clinical Review of vitamin D – May 2022
- Skin impedance might be a rough measure of Vitamin D – Dec 2021
- 42X increased vitamin D testing of children, no increase in levels (too little vitamin D prescribed to make a difference) – July 2021
- How to compare Vitamin D measurements from multiple studies – July 2021
- 4 popular vitamin D testers gave very different results (no surprise) – June 2021
- Vitamin D tester based on villi absorption in intestines found to be extremely sensitive – Sept 2021
- Instant, low-cost Vitamin D test kits available - UK Amazon - April 2021
- Excessive lipids in blood can result in very low vitamin D test results – Oct 2020
- Huge variation in Vitamin D test results between 4 testers for 8 people – 2013
- Several governments have restricted Vitamin D testing (hard to associate low D with COVID-19) - Jan 2021
- Vitamin D testing by prototype optical waveguide using Smartphone - Nov 2020
- Greatly improved Vitamin D testing repeatability – May 2020
- Epimers of Vitamin D: A Review – Jan 2020
- Vitamin D tests for Canadian BC adults can only be ordered by specialists – Oct 2019
- Vitamin D testing accuracies, including dried blood spot – Jan 2020
- 94 X increase in Vitamin D testing in Australia (2000-2010, then they shut it down) – Dec 2019
- Vitamin D testers have different test results if there is chronic kidney disease – Sept 2019
- Low trauma bone fractures in seniors – considering Vitamin D loading dose for all, without testing – Nov 2019
- Magnesium, Vitamin D, Omega-3, TSH - importance and testing - Dean and Baggerly - Oct 2019
- Body impedance can estimate body fat, and perhaps Vitamin D – Sept 2019
- Vitamin D levels observed to vary by 20 percent during a day – Feb 2019
- Problems with Vitamin D Testing – chapter – Aug 2019
- Vitamin D levels vary across the brain, what about other body tissues – July 2019
- Instant Vitamin D testing aided by a smartphone has 90 percent accuracy – Oct 2017
- UK (NHS) now provides blood taking at home (Vitamin D, panel, etc.) – June 2019
- Saliva and Vitamin D – many studies
- Vitamin D compliance 3X higher when children with fractures actually knew their low vitamin D level – March 2019
- Australians paying for most Vitamin D tests, 40 percent deficient in winter - March 2019
- Vitamin D home tester wanted – 50, 000 dollar prize offered by Nestlé – Feb 2019
- Health Insurance (UnitedHealth) restricting Vitamin D payments to only a few diseases – Dec 2018
- Child died in hospital, death due to low vitamin D, mother is suing hospital – Nov 2018
- Vitamin D testing at home – for as little as 50 dollars on Amazon
- Some employers offer vitamin D testing, some doctors reduce doses, even if deficient – July 2018
- Vitamin D test using electrospun nanofibers (looks promising) – Dec 2018
- UK considers Vitamin D tests appropriate for only 4 existing health problems, – June 2018
- Low-cost Vitamin D testers (two yes-no tests for 11 dollars) - 2024
- Who needs a vitamin D test -Those with symptoms or those in high risk groups - March 2018
- Hypothesis: Should test for unactivated Vitamin D, not activated – Feb 2018
- Vitamin D deficiency of a group - 15 pcnt to 48 pcnt (depends on tester used) - Nov 2017
- Vitamin D testing in Spain increased 3X in 2 years (considering 28,000,000 people) – Oct 2017
- Mandatory Vitamin D screening for all patients – vitamin D conference in Middle East – March 2017
- More hospitals or more Vitamin D – your choice
- Japanese need at least 30 ng of Vitamin D, test costs are now reimbursed – Nov 2016
- France restricts Vitamin D testing to 4 health problems, paper proposes 5 more – Nov 2016
- How should Vitamin D be tested – a changing landscape – June 2016
- How Alberta Canada restricts Vitamin D testing – May 2016
- Vitamin D test costs reimbursed in Japan – Aug 2016
- France restricts payments for Vitamin D tests – Dec 2015
- Pregnancy – major changes in vitamin D metabolites – Nov 2015
- Vitamin D estimation– possibly use infrared to estimate vitamin D general range - Sept 2015
- Vitamin D test costs Obamacare pregnant woman 214 dollars (vs 6 dollars for a bottle) – Oct 2015
- Canadians – 37 percent have less than 20 ng of vitamin D (after adjusting test results with standards) – Sept 2015
- Vitamin D deficiency can sometimes be inferred by Autofluorescence of skin - 2015
- Big differences (~10 ng) in vitamin D test results, even when using the same type of tester – Aug 2015
- Active Vitamin D (Calcitriol) reference ranges, why too high is a problem– April 2015
- Vitamin D – whom to test and whom to treat – May 2015
- Vitamin D measurement at home with dried blood spot had a 71 percent successful return rate – April 2015
- Wrong vitamin D test continues to be ordered - 66 percent of active Vit D tests were not wanted - March 2015
- Medicare now pays for just one vitamin D test , but 20 CT scans for smokers – Feb 2015
- Task force confirms - not much benefit from low Vitamin D supplementation – Nov 2014
- Of the few who needed a second vitamin D test only 20 percent had became sufficient – Aug 2014
- Vitamin D measurements vary with the same sample of blood – March 2014
- Percent who are Vitamin D Deficient: 6, 9, or 22 – depends on testing system – Oct 2014
- Bone tenderness weakly associated with vitamin D levels – Sept 2014
- Cancer patients at high risk of vitamin D deficiency were not tested as often (paradoxically) – July 2014
- Virtually all vitamin D testing not associated with a symptom, but 10 percent had osteoporosis – April 2014
- Vitamin D Testers coming soon (low cost and easy) - June 2014
- Vitamin D testing AND levels are increasing in Australia (NSW) – May 2014
- Vitamin D tester by Cue: consumables only 4 dollars per vitamin D test – Spring 2015
- Vitamin D testing in Australia before they shut it down – 42 percent retested – 2013
- No vitamin D test needed before supplementing (typically) – April 2014
- Warning – Medicare will pay for just 1 vitamin D test PER LIFETIME (if not related to a few diseases)
- 50,000 IU monthly safe to take without any vitamin D testing – RCT Dec 2013
- Vitamin D testing using smartphone camera: Prototype – Dec 2013
- Vitamin D test statistics: recent increase, esp. middle age, most under 30ng – Nov 2013
- One test to estimate Vitamin D, A, Cu, Se, etc : measure proteins in blood – Oct 2013
- Technical comparison of vitamin D testers – July 2013
- New vitamin D tester approved – not very accurate – July 2013
- New Zealand GPs being asked for vitamin D testing and prescriptions – June 2013
- 80 X increase in Vitamin D testing in Australia in a decade - June 2013
- Vitamin D tester falsely said half of hemodialysis patients had less than 30 ng – Jan 2013
- No longer debating vitamin D supplementation, now debating need for testing first – April 2013
- Increased vitamin D testing did not result in increased bone density – April 2013
- Vitamin D testing continues to have lots of varition between systems – Nov 2012
- Instant vitamin D Yes-No test now available
- Tests for Vitamin D
- After bone fracture, vitamin D unchanged but 1,25(OH)(2) D decreased – Jan 2013
- Active level of vitamin D are not indicated by standard blood tests - Sept 2012
- If you are obese, use sunscreen, or don't drink milk you may be vitamin D deficient – March 2012
- Vitamin D testing in Australia - huge increase in 11 years - July 2012
- Chronic Kidney Disease reduced with 3600 IU vitamin D (50000 twice a month)– RCT Aug 2012
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Tests for Vitamin D
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