- There were 10+ home test kits on Amazon (US) as of Oct 2018
- Generally home test kits are only a little less accurate than those in labs.
- home tests are generally within 5 nanograms of a lab measurement
- Cost of home testing is often 3X lower cost than hospital testing
- Cost of home testing is similar to costs of tests from Life Extension
- which require driving to a lab – which can be 10-300 miles away
I happened to have used this one - when it was on sale
Tests for Vitamin D category listing has