By Anthony Martinelli

According to a new study published by the The American Journal of Medicine, marijuana use doesn’t seem to be harmful to kidneys.

“Our research provides some reassuring evidence suggesting that there is no detrimental effect of infrequent, relatively light use of marijuana on kidney function among healthy adults under age 60,” said lead investigator Dr. Murray Mittleman, professor of epidemiology at Harvard University’s School of Public Health and an associate professor of medicine at Harvard Medical School.

“However, our research does not address heavy users, the elderly, or those with pre-existing chronic kidney disease,” said Mittleman in a press release. “Research is needed to evaluate the impact of marijuana use in adults 60 and over, and among those with existing or at risk of developing kidney disease.”

To investigate the effects of marijuana on kidneys, Mittleman’s team analyzed data from nearly 14,000 U.S. adults, ages 18 to 59, who took part in the National Health and Nutrition Examination Survey from 2007 to 2014.

When questioned, nearly 5,500 of the adults said they had smoked marijuana at least once, but not in the past 30 days, and more than 2,000 said they had smoked marijuana at least once within the last 30 days.

The researchers checked levels of microalbuminuria (an increase in urine albumin, which is a marker for kidney disease), and found no association between past or current marijuana use and worsened kidney function or disease.

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