Vitamin D Test
Thorne is a leader in clinical-grade diagnostics, offering a dried blood spot test that has been validated against traditional venous draws. Their reporting is exceptionally detailed, providing actionable insights beyond just a numerical value.
Ingredients & Purity
Includes medical-grade lancets and high-absorbency collection cards that minimize sample contamination.
Scientific Evidence
Thorne is the only supplement brand to collaborate with the Mayo Clinic on health research and uses CLIA-certified labs.
Brand Transparency
Full disclosure of laboratory partners and clear explanations of how Vitamin D (25-OH) is measured.
Value Assessment
Priced at a premium ($95), but the inclusion of a personalized health plan and high-quality collection materials justifies the cost.
Why Not Alternatives?
Unlike cheaper Amazon-based kits, Thorne uses labs that participate in rigorous proficiency testing and provides a dashboard that integrates with their high-purity supplement recommendations.