Could normalizing marijuana use lead to a heart health crisis? A dire new study has found a significant association between cannabis use and an increased risk of heart attack and stroke among adults in the United States. This comprehensive analysis, which included data from 430,000 individuals, sheds new light on the potential cardiovascular dangers of cannabis.

Cannabis, also known as marijuana, remains illegal at the federal level in the U.S., yet 24 states and Washington, D.C. have legalized its recreational use. Its popularity has soared, with the 2019 National Survey on Drug Use and Health reporting that 48.2 million people over the age of 12 used cannabis at least once that year, a significant rise from 25.8 million in 2002.

Lead study author Dr. Abra Jeffers says,

Despite common use, little is known about the risks of cannabis use and, in particular, the cardiovascular disease risks. The perceptions of the harmfulness of smoking cannabis are decreasing, and people have not considered cannabis use dangerous to their health. In addition, smoking cannabis — the predominant method of use — may pose additional risks because particulate matter is inhaled.

Researchers discovered that any form of cannabis use was associated with a higher number of adverse cardiovascular issues. Notably, the risk increased with the frequency of use. Daily cannabis users had a 25% higher chance of experiencing a heart attack compared to non-users, while their risk of stroke was 42% higher.

Particularly alarming was the finding that younger adults at risk for premature cardiovascular disease showed a 36% higher likelihood of suffering from coronary heart disease, heart attack, and stroke due to cannabis use.