CBD comes in three forms. Full spectrum keeps every hemp compound including trace THC (up to 0.3%). Broad spectrum keeps the other compounds but removes the THC. Isolate is 99%+ pure CBD and nothing else. That single difference — how much of the plant is left in — drives everything: cost, taste, and whether there's any THC at all.
The full comparison
| Type | What's in it | THC | Typical cost/mg | Best for |
|---|---|---|---|---|
| Full spectrum | CBD + all hemp compounds | Up to 0.3% | $0.10–0.20 | Whole-plant purists |
| Broad spectrum | CBD + most compounds | 0% (removed) | $0.10–0.20 | THC-avoiders who want the rest |
| Isolate | 99%+ pure CBD | 0% | ~$0.006 | Cheapest, zero-THC option |
What "the entourage effect" actually is
Full and broad spectrum marketing leans on the "entourage effect" — the idea that CBD works better alongside the plant's other compounds. It's a real hypothesis and worth respecting. But it only matters if you're looking for the whole-plant experience. If you simply want pure CBD at the lowest possible price, isolate gives you exactly the CBD — no more, no less.
Does isolate show up on a drug test?
Standard drug tests screen for THC metabolites, not CBD. Since CBD isolate is 0% THC, it is the only form that is guaranteed to contain no THC to metabolize. Full and broad spectrum carry at least the theoretical risk of trace THC. If you're subject to drug testing and want zero risk, isolate is the defensible choice.
Why isolate is cheaper
Isolate is the raw extracted compound, stripped of everything else. It's produced in bulk and is a commodity, trading at roughly $0.15–0.50 per gram wholesale. Full and broad spectrum require more careful processing to preserve or re-add other compounds, so they cost more on the shelf. That's why the same amount of CBD is dramatically cheaper as isolate.
Which one should you choose?
- Choose isolate if you want pure CBD, guaranteed 0% THC, the best price, or a neutral taste you can add to anything.
- Choose broad spectrum if you want the plant's other compounds but insist on no THC.
- Choose full spectrum if you want the complete plant including trace THC and don't mind the higher price.