What is weed made of?
Weed is made of dried cannabis flower and the compounds inside it. A single plant produces more than 500 known chemicals, and the two that get the most attention are THC (tetrahydrocannabinol) and CBD (cannabidiol). Both belong to a family called cannabinoids, which sit in resin glands on the flower surface.
The full makeup splits into a handful of groups: cannabinoids, terpenes, flavonoids, plant fibers, waxes, water, and trace minerals. Each group plays a different role in how the plant grows and how the final product feels.
What are the main parts of a cannabis plant?
Only the female flower carries THC in amounts people care about. Growers remove male plants before they open because a pollinated female shifts energy from resin to seed.
- Cannabinoids: THC, CBD, CBG, CBC, THCV, and others, stored in trichomes.
- Terpenes: aromatic oils such as myrcene, limonene, and pinene.
- Flavonoids: pigments and antioxidant compounds, including cannflavin A and B.
- Plant matter: cellulose, hemicellulose, lignin, chlorophyll, and water.
- Minerals: calcium, potassium, magnesium, iron, and zinc pulled from the soil.
How do cannabinoids form in the plant?
Cannabinoids start as acids, not as the active forms people smoke. The plant builds CBGA (cannabigerolic acid) first, then enzymes convert it into THCA, CBDA, or CBCA. Heat or time strips the acid group off in a step called decarboxylation, and THCA turns into THC.
That step explains why raw flower does not get you high when eaten. Smoking, vaping, and baking all apply enough heat to finish the conversion.
Minor cannabinoids follow the same path. CBG, CBC, and THCV all trace back to CBGA, and the plant makes them in smaller amounts. Breeders select for plants that push more of one pathway than another.
What is the difference between THC and CBD?
THC and CBD share the same molecular formula, C21H30O2, but the atoms are arranged in different spots. THC fits CB1 receptors in the brain and produces the high. CBD binds those receptors with low affinity and works through other targets, so it does not intoxicate.
What role do terpenes play?
Terpenes are the oils that give cannabis its smell and flavor. They are the same molecules found in pine, citrus peel, and lavender. Lab reports list total terpenes at about 1% to 4% of dry flower weight, though some cultivars test higher.
- Myrcene: earthy, hops-like aroma.
- Limonene: citrus.
- Pinene: pine.
- Linalool: floral.
- Caryophyllene: black pepper.
- Terpinolene: herbal and sweet.
Terpenes do not produce a high on their own. They shape aroma, taste, and the texture of the smoke or vapor.
What about flavonoids and pigments?
Cannabis makes about 20 flavonoids, a class of compounds that also shows up in fruit and vegetables. Cannflavin A and B appear in cannabis and are under study for anti-inflammatory activity, with most research still early. Chlorophyll supplies the green color and the bitter, grassy taste in fresh material.
That bitter note is why makers of vape oil and edibles run flower through a filtering step. Remove the chlorophyll, keep the cannabinoids and terpenes.
Does weed contain nicotine?
No. Nicotine comes from tobacco, a plant in a different family. A clean cannabis sample tests at zero for nicotine unless it was mixed with tobacco or stored next to it.
How does growing shift the chemical makeup?
Genetics set the limit on what a plant can make. Environment decides how close it lands to that limit.
- Genetics: the strain decides which cannabinoids and terpenes are possible.
- Light: drives photosynthesis and resin output.
- Nutrients: feed growth, and some affect terpene levels.
- Harvest timing: trichomes move from clear to cloudy to amber as THC peaks and fades.
- Curing: drops moisture and protects volatile terpenes.
What is in the product you buy at a dispensary?
Flower
Dried flower holds about 10% to 15% water by weight. The rest is plant fiber, cannabinoids, terpenes, and minerals. THC on legal US labels spans under 1% to more than 30%, and CBD flower can test high in CBD with almost no THC.
Concentrates
Extraction strips away most plant matter. Wax, shatter, rosin, and live resin can test above 70% THC by weight. Live resin keeps more terpenes because the plant is frozen right after harvest instead of dried.
Edibles and tinctures
These products replace flower with an oil or fat base. THC is decarboxylated first, then dissolved into butter, oil, or syrup. Dosing comes from the milligram count printed on the package.
Why does the chemical makeup matter to you?
Your endocannabinoid system responds to ratios, not to a single number. A product with 20% THC and 15% CBD will hit different from one with 20% THC and no CBD. Terpenes add flavor and aroma, and many consumers report that the terpene profile shapes the feel of a given strain.
FAQ
Is weed a plant or a chemical?
Both. It is a plant that makes chemicals. The flower is biological tissue, and the cannabinoids inside it are the active molecules.
What percentage of weed is THC?
Most dried flower tests between 15% and 25% THC, with some modern cultivars above 30% and hemp below 0.3%. The number depends on genetics, growing conditions, and the lab doing the test.
Does weed have calories or protein?
Flower is not a food in any real sense. Hemp seed, a different part of the plant, is the food product, and it carries protein, fiber, and fats. Smoking or vaping delivers no calories.
Can THC be made without a plant?
Yes. Yeast can be engineered to produce THC and CBD through fermentation, and the result is chemically identical to the plant version. This method is legal in some markets and still rare on store shelves.
What is weed made of, in one line?
Weed is dried cannabis flower built from cannabinoids, terpenes, flavonoids, plant fibers, and water. THC and CBD drive most of the effects, terpenes drive the smell, and everything else is the plant's own structure. A lab label tells you the exact mix in the product in front of you.