CBC (Cannabichromene): What It Is and What Is Known

Overview and classification

CBC (cannabichromene) is a minor cannabinoid from the cannabis plant. In this library "CBC" means the cannabis compound; the same letters are also the common abbreviation for a blood test (complete blood count). CBC the cannabinoid is made from the shared precursor CBGA, using its own enzyme, CBCA synthase. [1] Its acid form is CBCA. [2]

Evidence labels used on this page: preclinical (cells/animals only), insufficient evidence, marketing claim.

Where it comes from and its chemistry

CBC occurs in the plant independent of the genetic locus (chemotype locus B) that controls THC versus CBD content. [3] A research team found that natural CBC occurs as a mix of two mirror-image forms (enantiomers) in a ratio that depends on the cultivar, and that the biological profile of each form should be studied separately. [4] This matters because a study of one CBC sample may not describe another. See cannabinoids explained.

What research shows

Proper evidence not found for benefit or safety in people. We checked PubMed for CBC reviews, mouse studies and pharmacokinetics; none reported a human clinical outcome. Do not read mouse results as human results.

Marketing claims and quality

The 2024 review notes that CBC products are sold over the counter and widely used with little or no evidence of safety or efficacy. [6] Claims about mood, pain or energy on CBC products are marketing claims. Content varies between products and batches, so a verified certificate of analysis matters; see product quality and certificates of analysis and minor cannabinoids at a glance.

Regulatory category (United States, read 2026-10-22)

The FDA says it has not approved a marketing application for cannabis for any disease or condition. [8] The FDA quotes the 2018 Farm Bill definition of hemp as the plant and its derivatives, cannabinoids, isomers and acids with a delta-9 THC concentration of not more than 0.3 percent on a dry weight basis. [8] The Congressional Research Service reports that definition is being amended to total THC, with portions delayed to December 11, 2026. [9] No CBC-specific rule was verified, and other countries and states were not checked. Laws change, and this is not legal advice. See cannabis and CBD laws by country.

Safety and special groups

Human safety data for CBC was not found. People who are pregnant, are breastfeeding, have liver or heart conditions, or take regular medicines should check with a clinician; see medication interactions. Keep products away from children; in the US, call Poison Help at 1-800-222-1222 or 911 in an emergency.