Learn and label guide
Explore terminology and evidence. This guide does not identify products, find sellers or provide individualized medical advice.
How to read and understand a cannabis product label
Canadian labels distinguish total package amounts, amounts per unit, and concentration by weight. Milligrams (mg) measure mass; mg/g measures mass per gram. Package net weight and the number of units are separate fields. A lot number and packaging date identify the batch. Label conventions vary by jurisdiction. A reported measurement is not proof of safety or a prediction of an individual response.
Read the Health Canada source · Retrieved 2026-09-12
Cannabis and cannabinoids: what you need to know
Cannabinoids are a group of substances found in cannabis; THC and CBD are two principal examples. The evidence depends on the specific substance, preparation, condition and study. Findings about a particular cannabinoid medicine do not establish benefits for all cannabis products. This summary does not establish individualized treatment or dosing advice.
Read the NIH / NCCIH source · Retrieved 2026-09-12
Cannabis health effects
Cannabis can affect attention, memory, coordination and reaction time. Health effects and risks depend on several factors, including frequency of use and other substances used. General educational information cannot determine an individual person’s safety or suitability. Questions about symptoms, pregnancy, medicines or treatment require a qualified health professional.
Read the CDC source · Retrieved 2026-09-12
A synthetic unit example
A label reporting 20 mg/g describes 20 milligrams per gram. Since one gram is 1,000 milligrams, that is 2% by mass. This is a unit conversion, not an amount to consume or a safety claim.