Cannabidiol, or CBD, is one of more than a hundred cannabinoids made by Cannabis sativa L. PubChem lists it as compound 644019, molecular formula C21H30O2, molecular weight 314.5. The Food and Drug Administration has approved exactly one CBD product — a prescription drug — and has concluded that CBD products cannot legally be sold as dietary supplements. Anything else you read about what CBD does has not been evaluated by FDA, including everything a hemp company tells you. This page covers what is actually established: the chemistry, the vocabulary on the label, and where the law stands.
Where CBD comes from in the plant
Hemp doesn't make CBD directly. It makes cannabigerolic acid, CBGA, which enzymes convert into the acid forms of the major cannabinoids — CBDA, THCA and CBCA. What's in a living plant is mostly those acids, not the neutral compounds people name.
The conversion happens with heat. Decarboxylation drives a carboxyl group off as carbon dioxide and turns CBDA into CBD. A 2021 review of cannabinoid extraction in Agriculture gives the arithmetic for the equivalent THC reaction: the acid loses 12 percent of its mass as CO2. That is why a lab report lists CBD and CBDA on separate lines, with a calculated total, rather than one figure.
The three words on the label
| Term | What it means |
|---|---|
| Full spectrum | The extract keeps the cannabinoids the plant produced, including THC up to the legal limit. Labels say so: Canna River's full spectrum products are marked "Contains THC" with the per-serving amount printed. |
| Broad spectrum | The same multi-cannabinoid extract with THC reduced below what the testing laboratory can detect. Described on labels as "non-THC" or "non detectable THC levels" — which is a statement about a detection limit, not about zero. |
| Isolate | A single cannabinoid purified on its own, typically a white crystalline powder. CBD isolate appears as a separate ingredient in some formulas, alongside the distillate. |
For the longer comparisons, see broad spectrum vs full spectrum and broad spectrum vs isolate.
What the FDA has and has not done
This is the part most CBD pages skip, and it is the part that actually answers "is this legitimate".
- One approved CBD drug. FDA has approved a purified CBD prescription medicine for certain rare seizure disorders. That approval covers a specific drug product at specific doses under a prescriber's supervision. It is not an approval of CBD in general and has no bearing on consumer hemp products.
- CBD products are not dietary supplements. FDA has concluded that CBD products are excluded from the dietary supplement definition under section 201(ff)(3)(B) of the Federal Food, Drug, and Cosmetic Act, because CBD is an active ingredient in an approved drug and was the subject of substantial public clinical investigation before being marketed as a food or supplement. That is why you will never see a Supplement Facts panel on a CBD bottle.
- Disease claims draw warning letters. FDA has sent warning letters to companies selling CBD products with claims to prevent, diagnose, treat or cure serious diseases. This is the enforcement line, and it is why a responsible hemp company talks about milligrams and lab reports rather than outcomes.
Where the law sits
The 2018 Farm Bill removed hemp from the controlled substances framework by defining it at 7 U.S.C. § 1639o as Cannabis sativa L. and its derivatives "with a delta-9 tetrahydrocannabinol concentration of not more than 0.3 percent on a dry weight basis." That definition is about the material. It is not a statement about dose, and it is not a federal approval of any finished product. Federal hemp law has also been amended since, and the rules continue to move.
What to read instead of effect claims
If a CBD page won't tell you what a product does, it should at least tell you exactly what it is. Four numbers do most of the work:
- Total cannabinoids in the package, in milligrams of named compounds — not milligrams of "hemp oil".
- Amount per unit: per gummy, per softgel, per millilitre. Canna River's Classic Tincture holds 100 mg of CBD per mL at every bottle size.
- The spectrum and the printed THC figure, which is the one that matters if you are drug tested.
- A batch code that matches a published report. Canna River lists its reports by batch ID in a public COA library; how to read a certificate of analysis walks through what's on one.
Divide the price by the total milligrams and you have the only figure that compares two brands fairly. No label prints it.
Frequently asked questions
Is CBD a dietary supplement?
No. FDA has concluded that CBD products are excluded from the dietary supplement definition under section 201(ff)(3)(B) of the FD&C Act.
Is CBD psychoactive?
CBD is a distinct compound from THC, with different chemistry. Beyond that, we don't make claims about effects, and no hemp seller legitimately can.
Is CBD legal?
Hemp and its derivatives are defined federally at 7 U.S.C. § 1639o, with a 0.3 percent delta-9 THC limit on a dry weight basis. State rules differ and federal hemp law continues to change, so the answer depends on where you are and when you ask.
What's the difference between CBD oil and hemp seed oil?
Hemp seed oil is pressed from the seed and contains essentially no cannabinoids. CBD oil is a cannabinoid extract carried in an oil, usually MCT. See CBD oil vs hemp oil.
Why doesn't this page say what CBD does?
Because FDA has not evaluated those statements, and because the companies making them are rarely in a position to know. What we can document — composition, milligrams, ingredients, batch reports, price — is on every product page.
Canna River products are intended for adults 21 and over. These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat or cure any disease.
