Toxicology & Substance Testing THC

THC & Metabolites.

THC and THC-COOH detection from DBS by LC-MS/MS. Cannabis use assessment from a finger-prick sample.

Quick Reference
Method
LC-MS/MS
Sample Types
DBS
Analytes

2 analytes

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What does this test assess?

This method detects THC and its primary metabolite THC-COOH in dried blood spots, enabling assessment of recent cannabis use or exposure.

Clinical indications include:

  • Detection of recent cannabis use
  • Assessment of passive cannabis exposure
  • Monitoring of cannabis abstinence in clinical settings
  • Research on cannabis pharmacokinetics

Measured analytes

Analyte coverage

THC (Δ9-tetrahydrocannabinol) and THC-COOH (11-nor-9-carboxy-THC, primary inactive metabolite).

Analytical technique

Both analytes are measured by isotope-dilution LC-MS/MS from DBS, providing specific and sensitive detection of cannabis use without cross-reactivity with other cannabinoids or interfering substances.

Frequently Asked Questions

What is thc?

Thc is an important biomarker for detection of recent cannabis use. Masdiag measures thc using validated analytical methods to provide clinically actionable results.

Why is thc important?

Thc testing is valuable for Detection of recent cannabis use, Assessment of passive cannabis exposure. Understanding thc levels helps inform personalized health optimization and clinical decision-making.

How is the thc sample collected?

Thc collection is simple and convenient: prick your finger at home to collect a dried blood spot (DBS). This allows remote sampling without venepuncture.

Who should get a thc test?

This test is recommended for individuals interested in detection of recent cannabis use. Masdiag thc testing helps guide personalized supplementation and health optimization strategies based on objective biomarker data.

What do thc results tell us?

Thc results provide insight into your metabolic status and detection of recent cannabis use. Combined with clinical context, Masdiag results inform evidence-based interventions for personalized health optimization.

Interested in this method?

Whether you need testing services, method transfer, or white-label kit development — we'd love to hear from you.