A cannabis label tells you the THC and CBD content, the serving size, the net weight, the batch number, and the date a lab tested the product. Read the potency panel first, then the serving count, then the test date. Those three blocks answer most questions before you spend money.

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What Goes on a Cannabis Label?

A legal package in a US state market carries six panels: potency, net weight or serving count, ingredients, warnings and allergens, a batch or lot number, and a pointer to lab results. Each state sets its own wording, so a California jar and a Colorado jar look different. The data inside works the same way.

what to look for on marijuana product labels

How Do You Read THC and CBD Numbers?

Potency appears as a percentage of total weight for flower and concentrates, and in milligrams per serving for edibles and drinks. Percent tells you strength per gram. Milligrams tell you the dose you swallow.

cannabis label terms explained

Total THC vs. THCA

Raw cannabis holds most of its THC as THCA, an acid that converts to THC when you apply heat. Labels list both. Total THC equals THC plus THCA multiplied by 0.877, because the acid form weighs more than the active form.

Cannabis Label Compliance and Regulation: What Has to Be on the Package

A jar marked THCA 24% and THC 0.8% delivers about 22% total THC once you vape or smoke it. A jar marked THC 24% and THCA 0.8% starts at that strength with no conversion needed.

Why Milligrams Beat Percent on Edibles

Edibles use milligrams because a percent hides the real dose. A 10 mg piece from a 100 mg bar hits harder than a 5 mg piece of the same bar. Ten mg is the standard single serving in most states, and 5 mg is a common starting point for new users.

What Do Serving Size and Servings Per Package Mean?

This line tells you how the maker expects you to divide the package. A gummy bag listed as "10 servings, 10 mg each" holds 100 mg of THC in total. Eat the whole bag and you took ten servings.

The same math applies to drinks. A 100 mg THC beverage marked "4 servings" means 25 mg per pour, a heavy dose for most people. The CDC notes that edible effects can take 30 minutes to 2 hours to appear, so wait before taking more.

Terpenes, Strain Type, and Cannabinoid Ratios

Terpene panels list aroma compounds such as myrcene, limonene, and pinene, often as a percentage. Some brands print them, many do not. When present, they say more about flavor and effect than the strain name does.

"Indica" and "sativa" on a label are trade terms, not botanical categories. The same plant can get either tag depending on who named it. The THC to CBD ratio is the harder number. A 1:1 product with 10 mg of each behaves nothing like a 20:1 product with 20 mg THC and 1 mg CBD.

Lab Testing, Batch Numbers, and COAs

Most packages carry a QR code that opens a certificate of analysis, or COA. The COA shows cannabinoid potency plus results for pesticides, heavy metals, microbials, and residual solvents. Match the batch number on the jar to the batch number on the COA before you trust it.

Check the test date. Cannabinoids shift as flower cures and dries, so a 14-month-old COA describes a different product than the one in your hand. A missing QR code or no batch number is a warning sign in any legal market.

Warnings, Allergens, and Storage Directions

Required warnings cover age restriction, impaired driving, and pregnancy or breastfeeding risk. Allergen lines matter for edibles made with dairy, nuts, soy, or gluten. Storage text often reads "keep in a cool, dark place," which slows the decay of THC into CBN.

How Can You Tell Whether a Label Is Real?

Slang names, cartoon art aimed at kids, or a blank potency panel point to an unregulated product. Those carry no dose guarantee, no test data, and no recall path if something goes wrong.

Frequently Asked Questions

Does a higher THC percentage mean a better product?

No. A 30% flower can smoke harsh and taste thin, while a 19% flower with strong terpenes may suit you more. Potency is one axis, not a score.

Why does some packaging say THC under 0.3%?

That threshold comes from federal hemp rules, which count delta-9 THC on a dry weight basis. Hemp-derived products can still list THCA, which converts to THC when heated, so read the full panel instead of one line.

Why do labels skip some cannabinoids?

States require a core list, often THC, THCA, CBD, and CBDA. Minor cannabinoids such as CBG, CBN, and CBC show up only when a brand pays for the extra panel.

What is the difference between net weight and serving size?

Net weight is the total amount of product in the package. Serving size is the portion the maker suggests for one use. A 1 g vape cart and a 100 mg edible bar can hold the same THC total while splitting into very different servings.