420 with CNW — Marijuana Potency Has Spiked in the Recent 50 Years

November 20, 2020 16:23:38

A team of researchers from the University of Bath Addiction and Mental Health Group has discovered that street marijuana around the globe is substantially stronger now than it was 50 years ago. This, they say, increases the risk of harm. The team incorporated into its study a minimum of 80,000 marijuana samples that had been tested within the past five decades from street samples collected in New Zealand, Italy, Denmark, France, Netherlands, UK and the United States. The research was financed by the Society for the Study of Addiction with the study’s findings being reported in the “Addiction” journal.

The researchers explored how THC concentrations had changed in various types of marijuana as the years rolled by. In herbal marijuana, the team discovered that the concentration of THC registered a 14% jump in the years 1970 through 2017. This was largely because the growing popular share of more potent marijuana varieties such as sinsemilla, which was preferred to traditional…


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