Full spectrum CBD: short answer

Full spectrum CBD is a hemp extract that keeps the cannabinoids, terpenes, and flavonoids found in the plant. CBD is the main cannabinoid. The extract also holds small amounts of CBG, CBC, CBN, and delta-9 THC. Under the 2018 Farm Bill, hemp must test at or below 0.3% delta-9 THC on a dry weight basis. A crop above that line is not hemp under federal law.

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What is in a full spectrum extract

Full spectrum vs broad spectrum vs isolate

Broad spectrum starts as full spectrum, then THC is removed. It keeps minor cannabinoids and terpenes. Isolate is purified CBD at 99% purity or higher, with no other plant compounds. The three types differ in THC content, taste, and cost.

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The entourage effect

The entourage effect is the claim that cannabinoids and terpenes work better together than CBD alone. Most published work on this is preclinical, using cells or animals. Human trials that compare full spectrum CBD with isolate are few and small, so the effect is not confirmed in people.

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Evidence for CBD itself

The FDA has approved one CBD product, Epidiolex, for two rare seizure disorders: Dravet syndrome and Lennox-Gastaut syndrome. The same agency has not approved CBD as a dietary supplement or a food ingredient. Human data for anxiety, pain, and sleep is mixed and comes from small trials.

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Dose and absorption

Oral CBD has low bioavailability in humans, about 6% in fasting conditions in one study. Taking it with a fatty meal raises absorption. Effects appear in 30 minutes to 2 hours and last several hours. No standard dose exists. Seizure trials used 10 to 20 mg per kg of body weight per day under medical supervision.

Drug tests

Full spectrum products can trigger a positive result on a urine immunoassay. The test looks for THC-COOH, a metabolite of delta-9 THC. Daily use of a product with 0.3% THC can accumulate. No dose is confirmed safe for a drug test.

Storage and labeling

Cannabinoids degrade with heat, light, and oxygen. Keep the bottle closed, in a cool dark place. Check the label for total CBD in milligrams, THC content, batch number, and a third party lab report. A certificate of analysis lists cannabinoid potency and tests for pesticides, heavy metals, and solvents.