The short answer
Convenience is a main driver of concentrate sales in the US. A 0.5-gram cartridge at 80% THC holds about 400 mg of THC. It needs no grinder, no papers, and no lighter. It fits in a pocket and leaves little odor. Those traits matter more to some buyers than flavor or price per milligram.
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What counts as a cannabis concentrate
A concentrate is any product made by separating cannabinoids and terpenes from plant material. THC levels run higher than flower because the plant matter is removed.
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- Kief: trichome heads sifted from dried flower. About 20% to 50% THC.
- Hash and bubble hash: kief pressed or washed in ice water. About 40% to 70% THC.
- Wax, budder, shatter, batter: solvent extracts, most often butane or propane. 60% to 90% THC.
- Live resin: made from fresh-frozen plants. Terpene content is higher than cured resin.
- Rosin: solventless. Heat and pressure only, pressed at about 180 F to 220 F.
- Distillate: refined THC oil, often 85% to 95% THC, with terpenes added back.
- RSO (Rick Simpson Oil): a full-extract oil taken by mouth, not inhaled.
- THCA isolate and diamonds: near-pure THCA as powder or crystal. THCA converts to THC when heated.
Potency numbers
Dried flower sold in US dispensaries tests near 15% to 25% THC in most state lab reports. Concentrates test from about 40% to over 90% THC. The gap is the point of the category and the main risk.
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Label math: multiply grams by THC percentage. A 1-gram jar at 80% THC holds 800 mg of THC. A 0.5-gram cartridge at 85% holds 425 mg.
Why convenience decides
- No combustion. No ash, no lighter, no rolling.
- Low odor. Vapor dissipates faster than smoke.
- Fixed hardware. A cartridge runs at one voltage with a button press.
- Unit-level portion control. You buy 0.5 g or 1 g, not an eighth.
- Shelf life. Sealed oil holds for months. Flower dries out.
Where convenience costs you
- Dose control. A three-second draw can deliver 1 mg to 5 mg of THC. Voltage, oil thickness, and draw length change that number. The label does not show it.
- Tolerance. Daily use of 70% or higher products raises tolerance faster than flower in most clinician reports.
- Price per milligram. Example math with sample prices: flower at $10 per gram and 20% THC is $50 per gram of THC. A $30 gram of wax at 80% is $37.50 per gram of THC. A $35 half-gram cartridge at 85% is about $82 per gram of THC.
- Hardware failure. Clogs, leaks, and dead batteries.
- Illicit-market risk. In 2019, vitamin E acetate in unregulated THC cartridges was tied to the EVALI outbreak.
US purchase limits and potency caps
Cannabis is a Schedule I drug under federal law. State rules differ.
- Colorado: adult-use buyers may purchase up to 8 grams of concentrate in one transaction.
- Connecticut: adult-use flower is capped at 30% THC and concentrates at 60% THC.
- Other states set limits by package, by day, or by combined THC weight. Check the state regulator.
How to pick one
- Read the THC and terpene numbers on the label, not the strain name.
- Rosin and bubble hash are solventless. Solvent extracts use butane, propane, CO2, or ethanol. Residual solvent testing is required in legal states.
- Live resin for flavor. Distillate for a neutral profile. RSO for oral use.
Storage
Keep jars sealed, upright, and out of sunlight. Heat degrades THC and terpenes. Rosin and hash hold better in a refrigerator. Silicone containers absorb terpenes, so glass is the better choice.
What is not settled
No single national figure exists for the concentrate share of US cannabis sales. State dashboards and private trackers report different numbers. Long-term health effects of daily high-potency concentrate use are also not settled. The research base on concentrates is thinner than the base on flower.