Cannflavin C
A cannabis-derived prenylated flavone that is chemically distinct from terpenes and still largely unstudied outside the lab.
Cannflavin C is not a terpene. It's a prenylated flavone — a polyphenol — found in cannabis alongside its better-known siblings cannflavin A and B. It was only formally characterized in 2008, and almost everything published on it is structural chemistry or preliminary in-vitro work. If a product or article claims cannflavin C has confirmed effects in humans, that's marketing. The honest summary: real molecule, real chemistry, essentially zero clinical evidence.
What it actually is
Cannflavin C is a prenylated flavone, a type of plant polyphenol, isolated from Cannabis sativa. It belongs to the same small family as cannflavin A and cannflavin B, which were first identified in cannabis in the 1980s [1][2]. Cannflavin C was characterized later, in a 2008 phytochemical survey of cannabis constituents by Radwan and colleagues, who reported its structure alongside several other previously undescribed compounds [3].
Despite being grouped with terpenes in some consumer-facing articles, cannflavin C is chemically not a terpene. Terpenes are built from isoprene units and are typically volatile oils responsible for aroma. Flavones like cannflavin C are non-volatile, crystalline polyphenols with a flavone backbone (a 2-phenylchromen-4-one core) carrying a prenyl side chain. We're including it here because users frequently search for it as a 'cannabis terpene,' and the honest answer is that the category is wrong. Strong evidence
Where it's found
Cannflavin C has, to date, been reported essentially only from Cannabis sativa tissue extracts [3]. Unlike cannflavin A and B, which have been investigated in multiple cultivars and tissues, cannflavin C is reported at trace levels and has not been systematically quantified across chemovars. There is no good public dataset showing which cultivars are 'high' in cannflavin C. Weak / limited
The biosynthetic pathway for the cannflavins involves an O-methyltransferase (CsOMT21) and a prenyltransferase (CsPT3) that act on the flavone luteolin; this pathway has been characterized primarily for cannflavins A and B [4]. Whether cannflavin C arises from the same enzymes or a side reaction is not firmly established in the published literature. Weak / limited
Aroma
None. Cannflavin C is a non-volatile flavone, so it does not contribute to the smell of cannabis flower or extracts. Any source attributing a specific aroma (citrus, pine, pepper, etc.) to cannflavin C is mistaken — those descriptors belong to genuine terpenes like Limonene, Pinene, or Caryophyllene. Strong evidence
Effects research: what we actually know
This is where honesty matters. The research base on cannflavin C is extremely thin.
- Cannflavin A and B have been shown in cell-based assays to inhibit prostaglandin E2 production roughly 30 times more potently than aspirin, suggesting anti-inflammatory activity in vitro [1][4]. This is real but preclinical — it does not mean swallowing cannabis gives you a super-aspirin.
- Cannflavin C specifically has been mentioned in screening studies of cannabis-derived compounds for activity against parasites such as Leishmania and Plasmodium, with modest in-vitro results [3]. Weak / limited
- There are zero clinical trials in humans evaluating cannflavin C for any indication. No data
- Bioavailability after smoking, vaping, or oral ingestion has not been characterized. Many flavones have poor oral bioavailability, which is a real obstacle that marketing copy tends to skip. Weak / limited
In short: interesting molecule, plausible anti-inflammatory chemistry by analogy to its siblings, but anyone promising therapeutic effects from cannflavin C in a product today is selling ahead of the data.
Strains dominant in cannflavin C
There is no published, reliable list of cannabis cultivars high in cannflavin C. Routine terpene/cannabinoid lab panels offered by commercial testing labs do not include cannflavins, and the few academic surveys that have quantified cannflavins focused on A and B [4]. Any strain marketed as 'high in cannflavin C' is making an unverifiable claim. No data
Related compounds
Within the cannflavin family:
- Cannflavin A — the best-studied; prenylated flavone, characterized in 1986 [1].
- Cannflavin B — methylated analog co-occurring with cannflavin A [2].
- Luteolin — the non-prenylated flavone precursor in the proposed biosynthetic pathway [4].
Genuine cannabis terpenes that do contribute to aroma and effect profiles — and that are often confused with flavonoids in consumer writing — include Myrcene, Linalool, Caryophyllene, and Humulene. If you came here looking for an aroma-driving compound, those entries are what you want.
Sources
- Peer-reviewed Barrett, M. L., Scutt, A. M., & Evans, F. J. (1986). Cannflavin A and B, prenylated flavones from Cannabis sativa L. Experientia, 42(4), 452–453.
- Peer-reviewed Barrett, M. L., Gordon, D., & Evans, F. J. (1985). Isolation from Cannabis sativa L. of cannflavin—a novel inhibitor of prostaglandin production. Biochemical Pharmacology, 34(11), 2019–2024.
- Peer-reviewed Radwan, M. M., ElSohly, M. A., Slade, D., Ahmed, S. A., Wilson, L., El-Alfy, A. T., Khan, I. A., & Ross, S. A. (2008). Non-cannabinoid constituents from a high potency Cannabis sativa variety. Phytochemistry, 69(14), 2627–2633.
- Peer-reviewed Rea, K. A., Casaretto, J. A., Al-Abdul-Wahid, M. S., Sukumaran, A., Geddes-McAlister, J., Rothstein, S. J., & Akhtar, T. A. (2019). Biosynthesis of cannflavins A and B from Cannabis sativa L. Phytochemistry, 164, 162–171.
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