Why Cannabis Use Doubles the Risk of Heart-Related Deaths

Doctors have warned about tobacco for decades, but marijuana is often seen as the safer choice. New research is poking holes in that belief. A large review of 24 studies shows cannabis users may face much higher risks of heart problems, even death.

These findings challenge how we think about marijuana and health, especially for younger users who might feel invincible.

Marijuana users were found to have double the risk of dying from heart-related causes. This is not just about people with pre-existing conditions. The spike in death rates appears even in those with no past heart issues, pointing to cannabis as a direct contributor.

Younger Adults Are More Affected

People under 50, especially those without heart disease, showed unexpected risks. Cannabis users in this group had higher odds of heart attacks and strokes. This could mean that marijuana itself plays a role, not just other health habits.

Marco / Unsplash / The study shows that the chance of having a sudden heart event like a heart attack jumps by 29% in marijuana users.

This kind of event can be deadly if not caught quickly, and it adds serious concern to casual or daily marijuana use.

Strokes, which cut off blood flow to the brain, become 20% more likely for cannabis users. That is a major worry, especially when many users are young and otherwise healthy. These numbers are too large to ignore.

The smoke from marijuana is not clean. It brings toxins and tiny particles into the lungs, much like tobacco. These can damage blood vessels and raise the chances of clots, which can lead to heart attacks or strokes.

Edibles Aren’t a Safe Alternative

UCSF researchers found that THC edibles drop blood vessel function by 56%. That is worse than smoking marijuana, which caused a 42% drop. So, eating cannabis is not a free pass. It carries real cardiovascular risks.

Vaping, dabbing, and smoking all involve breathing in substances that hurt the body. They contain carcinogens and particles that strain the heart and arteries. Even without nicotine, these methods stress the cardiovascular system.

Budding / Unsplash / Cannabis today isn’t what it was in the 1970s. THC levels have climbed 5 to 10 times higher, with some concentrates hitting 99%.

This means users now get a much stronger hit, and the health effects are still being uncovered.

With more THC comes a bigger chance of developing marijuana use disorder. Roughly 30% of users end up hooked. Psychosis risks also climb, especially for those who start young or use heavily.

Doctors believe marijuana should come with the same public health messaging that tobacco does. That means fewer ads and more education about the risks.

The NIH is pushing doctors to ask patients about their cannabis use. Since many heart issues are silent, this could catch problems earlier and help people make safer choices.

This means they can’t prove weed causes heart issues, only that there is a strong link. Other factors, like diet or lifestyle, might play a role. Still, the numbers are big enough to spark serious concern.

Today, daily marijuana use has passed daily alcohol use in the U.S., especially among younger adults. That makes these heart risks even more pressing. More people are exposed, and often with less public health guidance.