New Study Shows Marijuana ‘Reprograms’ Sperm Genes, DNA, Lowers Sperm Count In Men

A composite photo. Left, cannabis flowers in a lab setting. Right, an illustration of sperm seeking an egg to fertilize.

A new study published today in the scientific journal Epigenetics seems to suggest that frequent cannabis — or marijuana — use can actually hold negative consequences for those men looking to become fathers. As the Verge details, this groundbreaking study adds to an existing body of research surrounding the effects of consistent intake of THC, and the findings are sure to come as a surprise to many.

For the purposes of this particular study, titled “Cannabinoid exposure and altered DNA methylation in rat and human sperm,” researchers at Duke University contrasted sperm from two group of rats. One group of rats had been subjected to THC — tetrahydrocannabinol — and the other group was left as a control, remaining clear of the active ingredient of the cannabis flower. A group of human subjects was also added to the mix, with 24 men who regularly smoked pot on a weekly basis being tested against a control group of men who had smoked marijuana less than 10 times in their entire lives.

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