Last reviewed 9 September 2026 · Originally published 1 August 2022
Are there any states where CBD is illegal? Not exactly — but one state allows ordinary CBD products only when they contain no THC, another is stricter than federal law, one large state changed its rules this year, and the details matter more than the headline.
Start with the federal layer. At the federal level, the 2018 Farm Bill removed hemp from controlled-substance law if it contained no more than 0.3% delta-9 THC by dry weight. That did not automatically legalise every CBD food or supplement, which remains subject to FDA rules. States can also impose stricter requirements. And the controlled-substance definition is about to tighten: from 11 December 2026, finished products will be capped at 0.4 mg of total THC per container, which will catch many full-spectrum products. We cover that in the November 2026 hemp law change.
The strictest states
Kansas generally allows ordinary CBD products only when they contain no THC. Idaho permits up to 0.1% THC, which is stricter than the current federal limit. Many full-spectrum products therefore remain unsuitable for either state, but Idaho is not a zero-THC state.
In both states, the THC line on a product’s certificate of analysis is the line that decides whether it qualifies — checked against your state’s limit, not the federal one. Our guide to what “THC-free” really means explains the difference between “not detected” and “zero”.
California changed the game this year
Since 1 January 2026, under a law called AB 8, California has prohibited hemp flower and pre-rolls, along with inhalable products containing hemp-derived THC. CBD added to food, drinks or supplements must come from an extract that is more than 99% pure and contains no THC. That effectively makes ordinary ingestible CBD products isolate-only outside licensed cannabis dispensaries. Topical cosmetics follow different rules.
Product rules, not CBD bans
Most other state quirks are about product types rather than CBD itself. Louisiana, for example, bans inhalable hemp products while allowing oils and edibles. Several states restrict CBD in food and drink, set their own age limits, or measure THC more strictly than the federal formula. These rules change often — several states rewrote theirs in the last two years — so the honest advice is to check your own state’s current position before buying, especially for anything you inhale and anything full spectrum.
The short version
CBD itself is widely permitted, but whether a particular product is legal can depend on its THC content, its form and the state where it is sold. If your product contains THC — and full-spectrum products do — then where you live decides whether it’s legal, and from December the federal rules tighten too. If in doubt, buy verified THC-free and read the spectrum label like it matters, because in some states it does.
This article describes United States law at the date above, changes frequently, and is not legal advice. Check your state’s current rules before buying or travelling with CBD.
