Two dropper bottles lay on an aqua background. Their pink labels read "Acid" and "LSD," respectively.
One of the biggest issues with an unregulated drug market is the presence of adulterants. Whether it’s fentanyl-laced heroin, levamisole cutting cocaine, or 25I posing as LSD, the presence of cutting agents often causes more harm than the illicit drugs themselves. Researchers in Santa Catarina,... Read more

Featured Articles

A cannabis leaf laid on top of a pair of metal handcuffs agains a bright white background.
The impressive medical properties of cannabis have been a major factor in the push to legalize cannabis. But the importance of social justice, beyond medical access, can't be overstated.
Illustration of a robot head with wires coming out of the neck smoking a cannabis joint. The head is black with a grey visor.
What does Apple's AI think about weed?
Cartoon of a hazmat-suited person driving a forklift and whistling. The forklift is holding a yellow barrel labeled "Danger: Hazardous Waste." The caption reads: "Reefer madness rides again"
Many CBD products contain no tetrahydrocannabinol. Where is all the THC going after it's extracted from hemp?
Expert cannabis botanist and geneticist Ryan Lee talks to Project CBD about breeding cannabis, THC & CBD content, and how to interpret lab data.
Illustration of a forest of mushrooms at night. The mushrooms are dark blue and in shadow, and dim light illuminates the background to a dark aqua.
Humans love finding ways to alter their consciousness, and psychedelic plants have long provided a way to do so. Why do these plants produce intoxicating compounds?

Essential reading

Learn what CBD is and what it isn't, the difference between CBD from cannabis and hemp, and more.
Project CBD has created a beginner’s guide for cannabidiol & cannabis therapeutics to address key questions of CBD users.
Medical cannabis research shows that CBD may be therapeutic for many conditions.
Get help deciding what kind of CBD product might work for you, how much to use, and how often.
With the growing awareness of CBD as a potential health aid there's also been a proliferation of misconceptions about THC's role in healing.

Smoke Signals: The Book

Image of the book Smoke Signals

Smoke Signals: A Social History of Marijuana

Get the book by Project CBD director Martin A Lee

  • Winner of the American Botanical Council’s James A. Duke Excellence in Botanical Literature Award
  • “Every American should read this landmark book!” — Douglas Brinkley
Get the book

Upcoming events

Map of upcoming events
Philadelphia , Pennsylvania , United States
Apr 4, 2020 to Apr 5, 2020
Las Vegas , Nevada , United States
Apr 21, 2020 to Apr 23, 2020
Galway , Ireland
Jul 4, 2020 to Jul 9, 2020