Isolate is a single cannabinoid (e.g. 99%+ CBD) with everything else stripped out — zero THC. Distillate is a refined, high-potency oil that may retain trace THC. Full-spectrum keeps the plant's whole cannabinoid and terpene profile (including legal-limit THC); broad-spectrum is full-spectrum with THC removed. The grade determines both effect and how the extract threshold applies.
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