Follow the evidence
Check the source.
Every word guide entry links to a reference. Here you can see what each source covers, where its limits are, and when we checked it.
A source link is a starting point. It does not mean a lesson has passed a full legal or medical review.
Start here
- Washington LCB: product types
An introduction to product categories and how they differ.
Checked 2026-09-11 - Washington LCB: reading lab results
Consumer guide to COAs and residual solvent screening. A test covers the sample and tests listed.
Checked 2026-09-11 - Washington DOH: medical compliance logos
Product-level compliance labels; not a blanket medical certification for a brand.
Checked 2026-09-11
Science & the body
- NIH: The three parts of the endocannabinoid system
Background definition in a 2022 research notice. The funding notice is expired; it is cited for anatomy, not a current grant or treatment approval.
Checked 2026-09-11 - Watts et al.: cannabis labels and genetic variation (2021)
A study of sample chemistry and genetics. This was not a trial of effects in people.
Checked 2026-09-11 - Cannabis and cannabinoids — NCCIH
Public health overview; benefits, uncertainty, and risks.
Checked 2026-09-11 - Terpenoids and cannabinoid receptors (2020)
Laboratory study; does not establish clinical effects of commercial products.
Checked 2026-09-06 - Beta-caryophyllene is a dietary cannabinoid (2008)
Preclinical CB2 research.
Checked 2026-09-06 - CBG crossover field trial (2024)
Small early human study; not an established treatment indication.
Checked 2026-09-06
Solvents & process words
- NIOSH chemical guide: isobutane
Chemical identity and workplace hazards; not a finished-product safety assessment.
Checked 2026-09-11 - California DCC: manufacturing categories
Explains solvent and mechanical categories. California licensing language is not a statement of what Washington permits.
Checked 2026-09-11 - NIOSH chemical guide: n-butane
Chemical identity and workplace hazards. Does not establish the safety of a finished cannabis product.
Checked 2026-09-11 - NIOSH chemical guide: propane
Chemical identity and workplace hazards. Does not establish the safety of a finished cannabis product.
Checked 2026-09-11 - NIOSH chemical guide: n-hexane
Chemical identity and workplace hazards. Does not establish the safety of a finished cannabis product.
Checked 2026-09-11 - NIOSH chemical guide: n-heptane
Chemical identity and workplace hazards. Does not establish the safety of a finished cannabis product.
Checked 2026-09-11
Washington rules & credentials
- Washington cannabis rules: Chapter 314-55 WAC
Regulatory starting point; individual sections and effective dates require review.
Checked 2026-09-06 - Medical cannabis product rules: Chapter 246-70 WAC
Medical product standards are a separate review track.
Checked 2026-09-06 - Washington medical cannabis consultant certification
DOH credentials are distinct from our learning badges.
Checked 2026-09-06 - Washington packaging and labeling: WAC 314-55-105
Labeling review reference.
Checked 2026-09-06
Place & measurement
- OIV: definition of terroir (2010)
A definition developed for wine growing. Useful background for the word, not evidence of cannabis health effects.
Checked 2026-09-11 - NIST: metric prefixes
Defines micro as one millionth. Does not establish a cannabis quality grade.
Checked 2026-09-11
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