
Marijuana, in smoke or edible form, increases heart disease risks, study finds
A new study conducted by researchers from the University of California San Francisco found that chronic cannabis users – who either smoked or consumed THC edibles – were at a higher risk of heart health concerns.
Marijuana smoke proved to disrupt healthy blood vessel function in otherwise healthy participants who used cannabis.
The findings showed that cannabis and tobacco yield similar risks to the endothelial function, which affects blood vessel function and overall heart health.
A new study conducted by researchers from the University of California San Francisco explored the heart health risks associated with cannabis use.
Their work found that cannabis users – who either smoked or consumed THC edibles – were at a higher risk of cardiovascular disease.
“There is a popular belief that marijuana smoke is harmless,” the researchers wrote in the study.
“However, marijuana smoke contains many of the thousands of chemicals contained in tobacco smoke, along with fine particles that contribute to cardiovascular morbidity and mortality. As cannabis legalization increases, it is crucial to understand the public health and clinical implications of marijuana use.”
The study
The researchers had 55 people enrolled in the study, which took place from October 2021 through August 2024. Participants were between the ages of 18 and 50, and they were all healthy when the study began.
Participants were broken into three groups: those who smoked marijuana, those who consumed edibles with THC, and those who didn’t use cannabis at all. Cannabis users had a history of using the drug at least three times a week for a year; edible-users had an average history of five years of chronic use, while marijuana smokers had an average history of 10 years of chronic use.
To assess the participants’ heart health, the researchers measured their arterial flow-mediated dilation (FMD) and carotid-femoral pulse wave velocity (PWV). The researchers also took blood samples from the participants to assess their blood vessel function, specifically testing how well their blood vessels produce nitric oxide – an important component of healthy blood vessel function.
The results
Overall, the researchers learned that cannabis users had impaired heart health. Compared to those who didn’t use cannabis, blood vessel function was over 40% lower in those who smoked marijuana. For those who consumed edibles, blood vessel function was 56% lower.
Researchers also found that chronic cannabis use—whether through smoking or edible THC consumption—was associated with impaired endothelial function, similar to the dysfunction observed in tobacco smokers.
Impaired endothelial function means the inner lining of your blood vessels isn’t working properly. This makes it harder for your blood vessels to relax and widen, which can increase the risk of high blood pressure, heart disease, stroke, and blood clots.
These findings ultimately suggest that consistent cannabis use may negatively impact vascular health, emphasizing the need for further research into the cardiovascular effects.
“This study enhances the understanding of the potential risks to vascular health linked to cannabis use and provides more evidence that cannabis use is not benign,” the researchers wrote.


New York sues major vape companies for targeting kids, teens
New York Attorney General Letitia James is suing over a dozen of the biggest vape manufacturers for targeting kids and teens with their products.
The lawsuit claims that the companies market their products directly toward young people, making vaping seem “cool,” while also spreading misinformation about the health risks of vaping, and ultimately contributing to a widespread trend of young people vaping.
“The vaping industry is taking a page out of Big Tobacco’s playbook: they’re making nicotine seem cool, getting kids hooked, and creating a massive public health crisis in the process,” James said in a news release.
“For too long, these companies have disregarded our laws in order to profit off of our young people, but we will not risk the health and safety of our kids. Today, we are taking critical steps toward holding these companies accountable for the harm they have caused New Yorkers.”
What companies are involved?
James has named over a dozen companies in the lawsuit, including:
Puff Bar
Elf Bar
Geek Bar
Breeze
MYLE
EVO Brands
Demand Vape
Magellan
Happy Distro
Midwest Goods
Pod Juice
Safa Goods
Mi-One
MVH 1
Price Point
What are the charges?
The lawsuit alleges that the companies in question deceived young people in their marketing and packaging. Many of them have utilized social media and prominent internet personalities to promote their products directly to teens.
The companies have also used bright, colorful, and cartoon packaging to make their products look more appealing to the younger demographic, as well as highlight candy and fruit flavors – like “Blue Razz Slushy,” “Sour Fruity Worms,” “Fruity Pebbles,” “Unicorn Cake,” and more.
In addition, many of the companies have touted their products as being a safer health alternative than traditional cigarettes.
New York banned the sale of flavored tobacco products in 2020, and the suit claims these companies have continued to illegally sell such products to consumers.
What’s next?
In the suit, James is seeking “hundreds of millions of dollars, including financial penalties for wide-ranging violations of local, state, and federal laws; damages and restitution for the public health impact of the companies’ illegal actions; the recovery of all revenue made from unlawful activity; and the establishment of an abatement fund to address the youth vaping crisis in New York.”
In addition, she’s looking for the companies to publicly address their health claims about vaping, and a permanent ban on selling flavored e-cigarettes in New York.
“Nicotine is a potent mind- and mood-altering drug that potentially develops into a physical and psychological dependence,” said Steve Chassman, executive director of the Long Island Council on Alcohol and Drug Dependence.
“The implications of nicotine intoxication and dependence for young people on their mental, physical, academic, and social well-being are far reaching when dangerous levels of nicotine are consumed at a vulnerable age. These dangerous products are being callously marketed as ‘candy-like’ materials, distorting the harmful effects the drug has on human development.”











