Nationally, the potency of marijuana has more than tripled since the mid-1990s.

  Average potency of marijuana flowers/buds in Colorado is now 17.1% THC while the average potency for concentrates is 62.1%. Potency rates of up to 95% have been recorded.
  After the Dutch observed negative impacts from rising THC potencies, a team of health experts concluded that THC potencies above 15% should be considered a hard drug.
  Colorado ranks 1st in the nation for youth (12+) use of marijuana.
  Research shows marijuana is harmful to the developing brains of adolescents, which may result in psychotic symptoms, schizophrenia, drug addiction and lower IQs.

The rise of high-potency pot has coincided with increases in Colorado hospitalizations and poison center calls.

  More potent pot has been tied to psychotic episodes.
A well-known British study has linked higher potency pot (12%-18%) to 24% increase in new cases of psychosis.
Tolerable doses of marijuana have yet to be determined even though highly potent pot is already being sold on Colorado’s commercial market.

Limit THC potencies until there is scientific evidence to prove highly potent pot does not pose unacceptable risks to public.

Educate the public – especially youth – on dangers of marijuana and well-studied and documented negative impacts to the developing brain of lower-potency pot.
Fund research to better understand the risks associated with such high concentrations of THC.
Limit marijuana commercialization, advertising and marketing, which normalizes and promotes use among youth.
Enforce laws restricting false health and benefit claims.

Unrelenting Vomiting

Paranoia Increased
Heart Rate Dangerous
Panic Attacks
Extended Psychosis
Difficulty Breathing

Call 911 for any medical emergency

Call 311 to report marijuana complaints and violations in Denver
Concerning reactions, call Rocky Mountain Poison & Drug Center 1-800-222-1222
To anonymously report anything that concerns or threatens you, your friends, your family or community, call Safe2 Tell 1-877-542-7233 (
Colorado Department of Public Health and the Environment 
National Institute on Drug Abuse for Teens
National Institute on Drug Abuse 

Download the #KnowPotency handout.

*Our handout includes all sources for facts mentioned above.

THC Potency in the News


Colorado Pot More Potent

NBS reports on findings presented to the presented at the 249th American Chemical Society National Meeting & Exposition that Colorado Pot is reaching record THC potency levels. This becomes increasingly concerning as the industry wants to revoke even


Marijuana linked to psychosis in new study

Highly potent marijuana linked to one in four cases of psychosis according to recent UK study. A recent study a decade in the making conducted by King’s College in London was just released by the journal Lancet Psychiatry finding that highly potent mari


This Is Your Brain on Drugs

Doctors and researchers across the country are concerned that existing research documenting mental health risks for adolescent marijuana users is no longer sufficient. That research, while showing serious and long-term health impacts, was largely conducte


Halloween Marijuana Edibles Warning

Unfortunately in Colorado children and teenagers (and even adults) don’t have any way of knowing if marijuana is in their candy, food, or drinks. Please read the warning put out by the Denver police and watch the video where Patrick Johnson, owner of