Marijuana: Boys Who Smoke Cannabis Are 4-Inches Shorter, Study Says

Marijuana: Boys Who Smoke Cannabis Are 4-Inches Shorter, Study Says

Rica Madrid poses for a photograph as she rolls a joint in her home on the first day of legal possession of marijuana for recreational purposes, Thursday, Feb. 26, 2015, in Washington. Democratic Mayor Muriel Bowser defied threats from Congress by implementing a voter-approved initiative on Thursday, making the city the only place east of the Mississippi River where people can legally grow and share marijuana in private. (AP Photo/Alex Brandon)
Rica Madrid poses for a photograph as she rolls a joint in her home on the first day of legal possession of marijuana for recreational purposes, Thursday, Feb. 26, 2015, in Washington. (AP Photo/Alex Brandon)

 

(HNGN) – Boys who smoke marijuana are 4-inches shorter than boys who have never smoked cannabis, according to a new study presented at the European Congress of Endocrinology in Dublin, Ireland.

Scientists at the Pir Mehr Ali Shah Agriculture University Rawalpindi in Pakistan studied the levels of certain hormones involved in growth and puberty in the blood of 220 non-smoking and 217 marijuana-addicted boys. Levels of puberty-related hormones such as testosterone and luteinising hormone (LH) were increased in the marijuana smokers. In contrast, growth hormone levels were decreased in this group. It was also found that non-smoking boys were on average 4 kg heavier and 4.6 inches taller by the age of 20 than the marijuana smokers.

The research team also looked at the effect of smoking marijuana on levels of the stress hormone, cortisol, in 10 marijuana addicts; they found that marijuana smokers have significantly higher levels of cortisol than non-smokers. Researchers hypothesized that marijuana use may provoke a stress response that stimulates onset of puberty but suppresses growth rate, according to a press release.

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