CBG, CBN, CBC, THCV and Other Minor Cannabinoids

Overview

Besides THC and CBD, more than 100 other cannabinoids have been identified in the plant. [1] Most have far less research behind them. NIDA says there is limited research on the health effects of several intoxicating or related compounds, including delta-10-THC, THC-O-acetate, THCV, THCP, HHC and CBN. [2] Evidence labels used here: promising but limited, insufficient evidence, preclinical (cells/animals only), evidence of harm and marketing claim. "Proper evidence not found" means we looked and found nothing usable.

CBG (cannabigerol)

• What it is. CBG is the precursor molecule for the most abundant phytocannabinoids. [3]
• How it acts. It has affinity at cannabinoid receptors between THC and CBD, and appears unique in interacting with alpha-2 adrenoceptors and a serotonin receptor (5-HT1A). [3]
• Lab and animal findings. A review of basic research in mice and rats reports anti-inflammatory effects in mouse colitis, effects on feeding behavior in mice, and anticancer properties, particularly against breast cancer. [4] Label: preclinical.
• Human research. A 2024 placebo-controlled crossover trial in 34 healthy adults reported lower anxiety and stress ratings after one CBG dose than after placebo, better verbal memory, and no sign of impairment. The authors say there were no earlier published clinical trials on this question. [5] Label: promising but limited: small, one dose, healthy adults, not people with an anxiety disorder.
• Marketing. A 2021 pharmacology review noted that CBG was being sold as a supplement with many claims, but little research and some potential hazards to investigate. [3] We did not verify its legal status.

CBN (cannabinol)

• The claim. CBN is often marketed as sleep-promoting. A systematic search of 99 human studies found 8 for detailed review. Research was dated and limited, mostly 1970s and 1980s with small samples, and no trials used validated sleep questionnaires or sleep-lab recordings. [6]
• Effects in people. Evidence that CBN itself causes cannabis-like effects was mixed, with most evidence showing it did not. [6]
• Label: insufficient evidence for sleep claims; the review calls for randomized trials. [6] See cannabis and sleep research.

CBC (cannabichromene)

• What is known. CBC shares the precursor CBG with THC and CBD. A 2024 review covers its early research on pain, bacteria and seizure activity and calls for more work. [7] In rodents it showed modest pain-relieving and anti-inflammatory effects. [4] Label: preclinical.
• Human data. Proper evidence not found for CBC treating any condition. We searched PubMed for human trials. The only human CBC data we read came from a pilot study of how the body absorbs CBC in a product that also contained CBD and THC; it said this had not been examined in humans before. [8]

THCV (tetrahydrocannabivarin)

• A pilot trial. In 62 adults with type 2 diabetes not on insulin, THCV lowered fasting blood glucose compared with placebo over 13 weeks and improved a measure of pancreatic beta-cell function. HDL cholesterol (the trial's main goal) did not change, and CBD-THCV combinations had no significant effect. It was well tolerated. [9]
• Label: promising but limited. One small pilot study. Sources disagree on how to classify THCV: that trial calls it nonpsychoactive, while NIDA lists it among compounds with limited research on health effects. [9][2]

Delta-8 THC and other converted cannabinoids

Delta-8 THC is psychoactive, found in only small amounts in the plant, and concentrated products are typically made from hemp-derived CBD. [10]

• Regulatory. The FDA says delta-8 THC products have not been evaluated or approved for safe use in any context. [10]
• Harm signals. The FDA received 104 adverse event reports between December 2020 and February 2022, with 55 percent needing intervention or hospital admission, and poison centers recorded 2,362 exposures, 41 percent in children under 18. [10] NIDA says eating large amounts has led to medical emergencies, including breathing problems. [2] Label: evidence of harm signals; these are reports, not rates.
• Manufacturing. Making delta-8 involves chemical conversion, possible harmful by-products and uncontrolled settings. [10]
• Labeling. Some are labeled simply "hemp products," which may mislead people who associate hemp with non-psychoactive. [10]
• Others (delta-10, THC-O-acetate, HHC, THCP). Limited research. [2]

Urgent: children

Gummies and other candy-like products may appeal to children. The FDA says keep delta-8 products out of reach of children and pets and call 9-1-1 for an immediate danger to health. [10] In the US, Poison Help is 1-800-222-1222; see Poison Help by country.

How to judge claims

Ask: was it tested in people, for which condition, against placebo, and how many? Certificates of analysis show what a product contains, but not whether it works; see certificates of analysis. Compare with CBD vs CBG and CBN.