A cannabis vape pen rests atop two green cannabis leaves.

Cal NORML Pilot Study Finds Using Cannabis Vape Pens Less Harmful Than Smoked Joints

A cannabis vape pen rests atop two green cannabis leaves.

Cannabis vape pens expose users to significantly less harmful toxins than smoked joints, according to a new lab study  sponsored by California NORML.  The study compared the emissions of two different vape pens – a disposable and a reusable cartridge model – with pre-roll joints purchased from a San Diego dispensary.  The vape pens emitted significantly cleaner emissions than the joint for almost all toxins tested, and, unlike the joint, were within EPA safe daily exposure limits for regular users.

“The dangers of vapes have been misrepresented by anti-smoking advocates to suggest their emissions are as hazardous as smoke,” says Cal NORML director Dale Gieringer. …

A government committee meets in a large, modern hearing room; people are seated around a curved desk. The screen displays “AB 762 Irwin: Vape ban on Disposable, Battery-Embedded Vapor Inhalation Device: Prohibition.”. CA NORML

Disposable Vape Ban Bill Amended to Remove Cannabis Vapes

UPDATE 1/26/2026: Asm. Irwin’s bill to ban disposable vapes passed in the Assembly Appropriations committee and was headed for a floor vote when it was amended to remove cannabis vapes from the language.

Cal NORML favors shifting to vapes with removable batteries and developing disposal options for cannabis vape waste. 

Manufacturers and retailers should explore re-designing vapes with removable batteries, and/or provide waste disposal programs for cannabis cartridges, vape pens, and batteries. 

See: THE GREEN PUFF: TRANSFORMING CANNABIS VAPING INTO A SUSTAINABLE PRACTICE  and

Raising the Volume: How Regulations and Consumer Market Trends Have Increased the Volume of Cannabis Packaging Waste in California

Consumers should be aware of proper disposal options for cannabis cartridges and integrated cannabis vaporizers. 

A close-up of a person holding an electronic cigarette, or vape, to their mouth, with vapor visible as they inhale. The device has a blue light and clear chamber showing liquid inside, reflecting progress since 50 years of cannabis reform. CA Norml

Cal NORML Launches Vape Pen Safety Study

A cannabis vape pen rests atop two green cannabis leaves.

UPDATE 5/26: The Study Has Been Released

California NORML is sponsoring a laboratory study to investigate the safety of electronic vape pens.

The study is designed to measure toxic emissions such as benzene, formaldehyde, and heavy metals that could be dangerous to health, as well as the amounts of THC and cannabinoids they deliver to users.

The study is a follow-up to California NORML’s 2001-2004 lab studies of herbal vaporizers, which heat up natural buds or leaf. The studies demonstrated that they could deliver virtually pure THC without any of the toxins or carcinogens present in smoke.…

A dropper with yellow liquid is held over an open bottle labeled "THC-O Acetate" with a chemical structure in the background. The image, featuring a green leafy backdrop, suggests a natural or plant-based product. CA Norml

Cal NORML Safety Warning: THC-O Acetate and Psychoactive Hemp Products 

A dropper with yellow liquid is held over an open bottle labeled "THC-O Acetate" with a chemical structure in the background. The image, featuring a green leafy backdrop, suggests a natural or plant-based product. CA Norml

UPDATE 2/15/23:

DEA Classifies Novel Cannabinoids Delta-8 And -9 THCO As Controlled Substances, Even When Synthesized From Legal Hemp

 NORML has always warned that delta-9-THCO is illegal under the Synthetic Analogues Act.  This DEA decision also applies to delta-8-THCO, which shouldn’t be confused with the more popular delta-8 THC.

A new study by Benowitz et al. [1] raises safety concerns about THC-O acetate, a potent psychoactive cannabinoid derived from hemp that is being marketed on the internet and unlicensed stores. The authors warn that THC-O acetate could potentially cause EVALI lung disease when vaped or smoked.…