The Case of the Missing THC

Many CBD products contain no tetrahydrocannabinol. Where is all the THC going after it's extracted from hemp?

Spirit Molecules

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?

Tough Times After High Hopes for Hemp Harvest

It's been a year since Congress legalized growing hemp. How's it going?

Hit & Run

A flawed study by Harvard scientists claims that marijuana impairs driving even when users aren't high.
Previous Next

Beginner’s Guide

New to cannabis therapy?

Start here

Find CBD near you

How can CBD help you?

Quick hit: Fake LSD, Real Danger

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
More quick hits:
Browse all

Featured Articles

A cannabis leaf laid on top of a pair of metal handcuffs agains a bright white background.
Marijuana Arrests After Legalization
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.
Artificial Intelligence on Weed
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"
The Case of the Missing THC
Many CBD products contain no tetrahydrocannabinol. Where is all the THC going after it's extracted from hemp?
Cannabis Botany & Breeding with Ryan Lee
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.
Spirit Molecules
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?
More news

Essential reading

What is CBD?
Learn what CBD is and what it isn't, the difference between CBD from cannabis and hemp, and more.

CBD User's Guide
Project CBD has created a beginner’s guide for cannabidiol & cannabis therapeutics to address key questions of CBD users.

Can CBD Help Your Symptoms?
Medical cannabis research shows that CBD may be therapeutic for many conditions.

What Is the Right Dose of CBD?
Get help deciding what kind of CBD product might work for you, how much to use, and how often.

CBD Vs. THC: Which Is Better?
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

CannAtlantic Cannabis Conference

Philadelphia , Pennsylvania , United States
Apr 4, 2020 to Apr 5, 2020

Cannabis Conference

Las Vegas , Nevada , United States
Apr 21, 2020 to Apr 23, 2020

ICRS 2020

Galway , Ireland
Jul 4, 2020 to Jul 9, 2020
View more events