The three classes (and why the lines blur)
Indica is associated with relaxing, body-heavy effects — typically good for evening or before-bed. Sativa is associated with energizing, head-forward effects — typically good for daytime or social activity. Hybrid blends both. In modern cannabis, almost everything is technically a hybrid, and the effect depends more on terpene profile than strict indica/sativa labeling.
Cannabinoids — THC and CBD
THC (tetrahydrocannabinol) is the primary intoxicating compound — it produces the 'high.' CBD (cannabidiol) is non-intoxicating but interacts with the same receptor system, often described as calming. Most cannabis products are labeled with both THC% and CBD% on the package. A 1:1 THC:CBD ratio is a common starting point for newcomers.
Product types in plain English
Flower — dried cannabis bud, sold by the gram, eighth, quarter, half-ounce, ounce. Pre-rolls — joints rolled and packed for you. Edibles — gummies, chocolates, drinks infused with THC. Vapes — cartridges and pens that vaporize cannabis oil. Concentrates — extracted, concentrated forms of cannabis (live rosin, diamonds, hash).
Terpenes — the aroma compounds that shape the experience
Terpenes are aromatic compounds that give cannabis its smell and are commonly associated with its character. Consumers often associate myrcene with body-relaxation, limonene with mood-lift, pinene with focus, and caryophyllene with a peppery, grounding feel. Reading terpene labels can be more useful than reading indica/sativa labels. (Descriptions reflect consumer experience, not medical claims.)
- National Institute on Drug Abuse — Cannabis (Marijuana) DrugFacts — National Institute on Drug Abuse (NIH)
- CDC — Marijuana and Public Health — Centers for Disease Control and Prevention
- Cannabis Pharmacology: The Usual Suspects and a Few Promising Leads — PubMed Central / NIH