Evidence ratings summarize a body of research. They are not individual medical recommendations.

Consistent evidence language for cannabis research.

CannaWize Co
Research MethodMedical Review

Evidence System

What Our Evidence Ratings Mean

A visible shorthand for confidence, paired with the study details that keep a label from becoming a slogan.

Stronger evidence

Consistent findings from well-conducted systematic reviews or multiple relevant randomized trials. The label still applies only to the studied population, formulation, dose, route, and outcome.

Moderate evidence

Useful clinical evidence with meaningful limitations, inconsistency, indirectness, or a small number of relevant trials.

Limited or early evidence

Small trials, observational findings, case series, indirect evidence, or results that require replication before supporting firm conclusions.

Insufficient evidence

No adequate human evidence for the claim, or the available research cannot answer the practical question being asked.

Required evidence panel

Substantive medical and research reviews should include this information when the source makes it available:

Evidence level
One of the four labels above, with an explanation.
Research question
The population, intervention, comparator, and outcome.
Study type
Systematic review, randomized trial, observational study, case evidence, animal study, or laboratory study.
Product and dose
The actual cannabinoid formulation, route, dose, and duration.
Primary result
The prespecified outcome, effect size, and uncertainty when reported.
Limitations
Bias, size, follow-up, generalizability, missing data, conflicts, and inconsistency.
Review status
Publication date, evidence-review date, and named medical reviewer when applicable.

Ratings can change

New trials, retractions, improved systematic reviews, or important safety signals can change a rating. Changes should be dated and, when material, described in a correction or update note.