Some companies provide quantitative results by looking at a vitamin D test strip
The cost of the test strip is about 1/2 the cost of a dried blood spot test
The in-home or in-office method gives results in 15 minutes
The dried blood spot test gives results in 3-5 days (mail-in and email back)
Preventis smartphone- medical professionals only Preventis
Kiweno smartphone 39 Euro Kiweno
Nanospeed Diagnostics with Cube Reader Nanospeed
Detection range: 3 to 100 ng/mL; 94% correlation with LC/MS blood tests
Cube reader (which takes the place of a smartphone) costs about $500
VitaminDwiki - Tests for Vitamin D contains the following overview/opinion
- 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 42 dollars) - 2023 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