Male cannabis users were seen to have less cognitive decline, according to a new study. Cannabis is one of the most widely used and abused drugs listed on the Drug Enforcement Administration’s Schedule I. Although the short-term negative effects of cannabis use on cognition were studied, only a handful of research was done on its association with age-related cognitive decline.
Researchers at the Univerity of Copenhagen studied about the relationship between cannabis use and age-related cognitive decline from early adulthood to late midlife. The study is published in Brain and Behavior. The researchers measured the cognitive decline using Denmark’s conscription board intelligence test, which is mandatory for men between the ages of 18 and 26. 5162 Danish men retook the test around the age of 64, between 35 and 53 years after their first test.
During the follow-up, 40 percent of the participants reported that they had tried cannabis at least once, while roughly 10 percent stated that they were frequently using it (which is at least twice a week for less than a decade), and nearly 12 percent used it for a decade or longer.
“Men with a history of cannabis use had less cognitive decline from early adulthood to late midlife compared to men without a history of cannabis use. Among cannabis users, neither age of initiation of cannabis use nor frequent use was significantly associated with a greater age-related cognitive decline, “Kirstine Maarup Høeg, public health scientist and the author said in the journal.
Other factors such as lower IQ scores, education level, tobacco smoking, or binge drinking, also pointed to significantly less cognitive decline among cannabis users with a history compared to non-users.
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The findings pointed out that there are no significant harmful effects of cannabis use on age-related cognitive decline. This is quite contrary to what was believed. The study author, however, adds that further studies are required to investigate whether these findings reflect that there are no adverse effects on cognitive decline or that the effects of cannabis are temporary and disappear after a prolonged period.
Meanwhile, a recent study found that low doses of Tetrahydrocannabinol (THC), the main active ingredient in cannabis, showed to reverse conventional signs of brain aging in mice.