Average THC has gone from around 4% in the 1990s to 20-30% today, with concentrates hitting 80-90%. Are we seeing more CHS because the product itself has fundamentally changed? Is potency the main driver?
There is a very clear correlation. The timeframe in which CHS emerged overlaps almost perfectly with the dramatic increase in cannabis potency and widespread adoption of concentrates. The circumstantial evidence is substantial.
I have been growing for 15 years and the difference between modern strains and what we had a decade ago is remarkable. Relentless high-THC selective breeding may have created something that is genuinely harder on the human body.
The worst CHS cases I see in the ER involve people using concentrates heavily — dabs, wax, shatter. The THC doses are enormous and the gut does not handle chronic exposure to those levels well.