The potency of marijuana has significantly increased over the past few decades. Modern cannabis products often contain much higher levels of tetrahydrocannabinol (THC), the compound responsible for its psychoactive effects, compared to what was available in the 1970s and 1980s.
Research shows that the average THC concentration in marijuana has risen from around 3–4% in the 1990s to over 15% in many strains today, with some specialized products exceeding 25–30%. This rise is largely due to advances in cultivation techniques, selective breeding, and the production of concentrated forms like oils, edibles, and dabs, which can contain THC levels as high as 90%.
For users, this means the effects of marijuana today can be much more intense, leading to stronger highs and, in some cases, a higher risk of adverse effects such as anxiety, paranoia, or impaired judgment. First-time or infrequent users are particularly susceptible to these effects and should approach modern cannabis products with caution.
While the increased potency has enhanced its appeal to experienced users and expanded its medical applications, it also highlights the need for responsible consumption, proper dosing, and education about potential risks. As cannabis continues to evolve, understanding its strength is essential for making informed choices.