Hemp-derived CBD became federally legal in December 2018, when the Farm Bill removed hemp — cannabis with 0.3% THC or less — from the Controlled Substances Act, and the DEA followed up in 2020 by formally removing hemp from Schedule I. Today, 0% THC CBD isolate from hemp sits squarely on the legal side of that line, though the FDA still regulates how CBD can be marketed.
The timeline at a glance
| Year | What happened | Why it matters |
|---|---|---|
| 1937 | Marihuana Tax Act | First federal restriction on cannabis, long before CBD was isolated as a compound |
| 1970 | Controlled Substances Act | Cannabis placed in Schedule I — no accepted medical use, no legal market |
| 2004 | Hemp Industries Association v. DEA | Court struck down a DEA rule that would have banned trace CBD in hemp foods |
| 2014 | Farm Bill §7606 | Allowed state pilot programs for industrial hemp research — the first crack in the door |
| 2018 | Farm Bill | Defined hemp as cannabis with ≤0.3% THC and removed it from the Controlled Substances Act |
| 2020 | DEA final rule | DEA formally removed hemp-derived cannabinoids, including CBD, from Schedule I |
| Today | FDA oversight | CBD is legal to buy and sell, but the FDA regulates marketing and has not approved it as a dietary supplement |
The 2018 Farm Bill: the actual rule
The law that changed everything is short at its core: the 2018 Farm Bill redefined hemp as cannabis containing no more than 0.3% THC by dry weight, and explicitly removed hemp from the definition of marijuana under the Controlled Substances Act. That one sentence turned hemp from a controlled substance into an ordinary agricultural crop. The bill also created a federal hemp program with USDA oversight and kept states able to pass their own restrictions — which is why state rules still differ. Our is-CBD-legal page covers the current state-by-state picture.
Where the DEA stands now
After the Farm Bill, the DEA published a final rule in 2020 confirming that hemp-derived cannabinoids — including CBD — are no longer controlled substances. The remaining controlled-substance territory is reserved for cannabis above the 0.3% THC line. This is exactly why 0% THC isolate is the cleanest legal form: it is hemp-derived, contains no THC, and falls outside the controlled-substance framework entirely. For more on the distinction, see hemp vs marijuana CBD and CBD vs THC.
What the FDA still controls
Legal to sell does not mean unregulated. The FDA has approved one CBD-based drug for certain seizure disorders, and it treats other CBD products under food, supplement, and cosmetic rules. The agency has stated it cannot legally treat CBD as a dietary supplement under current law and has asked Congress for a new regulatory pathway. It also draws a hard line we respect: any product that claims to treat or cure disease must go through drug approval. That's why we sell isolate concentrate and let the lab reports and the price speak — no medical claims anywhere.
CBD and the military
One group with a bright-line policy: the Department of Defense prohibits service members from using CBD products in any form, citing zero-tolerance drug testing and the risk of THC contamination. The policy does not exempt hemp-derived or 0% THC-labeled products. If you're in the military, this page is the answer to that question — and if you take drug tests at work, it's worth reading whether isolate shows up on drug tests before buying anything.