Marijuana may up heart attack, stroke risk: study

WASHINGTON (Reuters) - Heavy marijuana use can boost blood levels of a particular protein, perhaps raising a person's risk of a heart attack or stroke, U.S. government researchers said on Tuesday. Dr. Jean Lud Cadet of the National Institute on Drug Abuse, part of the National Institutes of Health, said the findings point to another example of long-term harm from marijuana. But marijuana activists expressed doubt about the findings. Cadet said a lot of previous research has focused on the effects of marijuana on the brain. His team looked elsewhere in the body, measuring blood protein levels in 18 long-term, heavy marijuana users and 24 other people who did not use the drug.
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