09/06/2026
There are three major cannabinoid directions people need to understand when they talk about this plant: THC, C*D, and CBG. Each has its own type of cannabis expression, chemistry, and role in the larger conversation.
The problem is that media, research, healthcare, and even the cannabis industry often say “cannabis” without telling people what type of cannabis they’re actually talking about.
That matters because a THC-dominant plant is not the same as a C*D-dominant h**p plant, and a CBG-dominant plant is another conversation altogether.
In the science, these are often described as chemotypes.
Type I is generally THC-dominant, Type II is mixed THC/C*D, Type III is C*D-dominant, and Type IV is CBG-dominant, where CBGA can accumulate because the plant’s chemistry isn’t pushing as heavily into THCA or C*DA production.
Research on cannabis chemotypes has made this clear, and newer genomic work continues to show that cannabinoid expression is driven by the plant’s synthase genes and chemotype-determining loci.
This is why I push back when people make broad claims about cannabis without naming the plant type.
A THC flower study does not automatically explain C*D h**p. A C*D product study does not automatically explain CBG. A CBG-dominant plant does not behave like a high-THC plant just because they’re both Cannabis sativa L.
The plant family is shared, but the chemistry can differ greatly.
Patients deserve better language. Growers deserve better language. Researchers definitely need better language. When we say cannabis, we should be asking what kind, what chemotype, what cannabinoid profile, what terpene profile, what ratio, what route, and what person is using it.
THC, C*D, and CBG are not just product labels. They represent different major lanes of the plant, and each lane can lead to a different experience, different therapeutic potential, and different ECS response.
Cannabis isn’t one thing; it’s a library. If we don’t name the book we’re reading, we can’t teach the lesson right.
Mike Robinson
Founder, Global Cannabinoid Research Center
The Researcher OG
Cannabis Inflorescence for Medical Purposes: USP Considerations for Quality Attributes
https://pubmed.ncbi.nlm.nih.gov/32281793/
The Structure of the Chemotype Determining Locus in Cannabis sativa
https://pmc.ncbi.nlm.nih.gov/articles/PMC13128303/
Identification of a New Chemotype in Cannabis sativa: Cannabigerol-Dominant Plants
https://www.thieme-connect.de/products/ejournals/abstract/10.1055/s-2006-962705