Our Editorial and Research Methodology
CannabisDrugTest.org exists to provide honest, evidence-based information. This page describes how we research, source, write, and update the content on this site — and the standards we hold ourselves to.
Our Sourcing Hierarchy
Different types of claims require different types of sources. Our hierarchy:
- Peer-reviewed scientific research — for all pharmacological and biological claims (pharmacokinetics, detection windows, false positives, secondhand smoke, etc.)
- Federal agency publications — for regulatory and procedural claims (SAMHSA guidelines, DOT rules, federal employment policies)
- Primary legal sources — statutes, regulations, and court decisions for legal claims
- Authoritative industry data — for trend and prevalence claims (Quest Diagnostics Drug Testing Index, NCSL state tracking)
- Established secondary sources — for general background where primary sources are not available
Where possible, we cite the primary source directly. Where we use secondary sources, we identify them.
What We Will Not Cite
- Product marketing materials. Detox drink websites, synthetic urine vendors, and CBD product sellers are not credible sources for drug testing efficacy claims.
- Forum posts and testimonials as evidence of methods working. Individual stories cannot substitute for clinical research.
- Unverified blog posts as authoritative sources. We may reference them when discussing folklore, but not as evidence.
- Older studies superseded by newer research. The field has evolved; we use current evidence.
How We Handle Uncertainty
Not everything in cannabis drug testing is settled science. When we discuss areas where evidence is weak, contested, or evolving, we say so. We use evidence-quality indicators throughout the site:
- Strong evidence — multiple peer-reviewed studies, federal agency consensus, or settled legal doctrine
- Moderate evidence — some peer-reviewed support but with limitations or open questions
- Weak evidence — limited research, contradictory findings, or low-quality studies
- No evidence — folklore, marketing claims, or unsupported assertions
- Dangerous — documented harms with no evidence of benefit
We explicitly flag rapidly evolving areas where information may be out of date by the time you read it.
How We Handle Conflicts of Interest
CannabisDrugTest.org has no financial relationships with:
- Drug testing companies or laboratories
- Detox product manufacturers or sellers
- Synthetic urine vendors
- CBD or hemp product companies
- Drug testing affiliate programs
- Legal referral services that pay for placement
- Insurance companies
The site is part of the TryCannabis.org Cannabis Education Network, which is funded through the network's general operations and is not dependent on any specific commercial relationship. Our analysis is not for sale.
How We Update the Site
Cannabis drug testing law and science change. We aim to update major content quarterly, with more frequent updates when significant developments occur. The areas most subject to change:
- State employment laws — new statutes pass regularly
- Federal rescheduling — the DEA rulemaking process is ongoing
- DOT oral fluid testing — awaiting laboratory certification
- Cannabis breathalyzer technology — commercial deployment is recent and evolving
- Major court decisions — cannabis employment law continues to develop
- Federal contractor and security clearance policies — could shift with rescheduling
Each page indicates the date it was last verified. Areas flagged as "rapidly evolving" should be cross-checked against current primary sources before relying on for decisions.
Errors and Corrections
If you find an error on this site — an outdated statute citation, a misquoted study, an incorrect detection window, anything — please tell us. We treat correction requests as our highest priority. Sources matter, and accuracy is the entire reason this site exists.
We will:
- Acknowledge correction requests within a few business days
- Investigate the issue against the relevant source
- Update the site if we confirm the error
- Note significant corrections in our editorial log
What This Methodology Cannot Do
Even with rigorous sourcing and regular updates, this site has limitations:
- It cannot replace legal advice for your specific situation
- It cannot replace medical advice from a qualified provider
- It cannot keep up with every state law change in real time
- It cannot eliminate uncertainty where the underlying science is genuinely unsettled
- It cannot guarantee outcomes for any specific testing situation
The goal is to give you the best available information so you can make better-informed decisions — not to give you certainty where none exists.