Susan Murch is a chemistry professor at UBC’s Okanagan campus. - UBCO

Little variety in THC levels with different cannabis strains, says new study

Kelowna - The research shows most strains, regardless of their name, had the same amount of THC.

A rose by any other name is still a rose. The same, it turns out, can be said for cannabis.

Newly published research from UBC’s Okanagan campus has determined that many strains of cannabis have virtually identical levels of tetrahydrocannabinol (THC) and cannabidiol (CBD), despite their unique street names, according to a UBCO news release.

“It is estimated that there are several hundred or perhaps thousands of strains of cannabis currently being cultivated,” says professor Susan Murch, who teaches chemistry at UBC Okanagan. “We wanted to know how different they truly are, given the variety of unique and exotic names.”

Cannabis breeders have historically selected strains to produce THC, CBD or both, she explains. But the growers have had limited access to different types of plants and there are few records of the parentage of different strains, the release said.

RELATED: B.C. marijuana rules say where you can’t smoke or vape

“People have had informal breeding programs for a long time,” Murch says. “In a structured program, we would keep track of the lineage, such as where the parent plants came from and their characteristics. With unstructured breeding, which is the current norm, particular plants were picked for some characteristic and then given a new name.”

Until now, the chemical breakdown of many strains has been unknown because of informal breeding, the release said.

Elizabeth Mudge, a doctoral student working with Murch and Paula Brown, Canada Research Chair in Phytoanalytics at the British Columbia Institute of Technology, examined the cannabinoid—a class of chemical compounds that include THC and CBD—profiles of 33 strains of cannabis from five licensed producers.

The research shows that most strains, regardless of their origin or name, had the same amount of THC and CBD. They also discovered that breeding highly potent strains of cannabis impacts the genetic diversity within the crop, but not THC or CBD levels, the release said.

However, Mudge says that they found differences in a number of previously unknown cannabinoids — and these newly discovered compounds, present in low quantities, could be related to pharmacological effects and serve as a source of new medicines.

RELATED: Marijuana rollout will be challenging, new territory for everyone: Horgan

“A high abundance compound in a plant, such as THC or CBD, isn’t necessarily responsible for the unique medicinal effects of certain strains,” says Mudge. “Understanding the presence of the low abundance cannabinoids could provide valuable information to the medical cannabis community.”

Currently licensed producers are only required to report THC and CBD values. But Murch says her new research highlights that the important distinguishing chemicals in cannabis strains are not necessarily being analysed and may not be fully identified, the release said.

Murch says while patients are using medical cannabis for a variety of reasons, they actually have very little information on how to base their product choice. This research is a first step towards establishing an alternative approach to classifying medical cannabis and providing consumers with better information.

Murch’s research was recently published in Nature’s Scientific Reports.


edit@kelownacapnews.com

Like us on Facebook and follow us on Twitter.

Just Posted

‘Police are ready’ for legal pot, say Canadian chiefs

But Canadians won’t see major policing changes as pot becomes legal

Illegal dumping pushes BC Conservation to the tipping point

Terrace office may bring violators to court to seek higher penalties

Natural gas pipeline cost soars

Coastal GasLink to carry gas from northeastern B.C. to LNG Canada plant at Kitimat

Airport wants LNG companies to build own terminals

Best way to handle expected crush of traffic

Naked man jumping into Toronto shark tank a ‘premeditated’ stunt: official

The man swam in a tank at Ripley’s Aquarium of Canada

Trump: Saudi king ‘firmly denies’ any role in Khashoggi mystery

Secretary of State Mike Pompeo is travelling to the Middle East to learn more about the fate of the Saudi national

Microsoft co-founder Paul Allen dies at 65

Allen died in Seattle from complications of non-Hodgkin’s lymphoma

Man surrenders after Terrace drive-by shooting

Mayor confident with police assurance of public safety

Transport Canada to take new look at rules, research on school bus seatbelts

Canada doesn’t currently require seatbelts on school buses

Sockeye run in Shuswap expected to be close to 2014 numbers

Salute to the Sockeye on Adams River continues until Sunday, Oct. 21 at 4 p.m.

Michelle Mungall’s baby first in B.C. legislature chamber

B.C. energy minister praises support of staff, fellow MLAs

Canucks: Pettersson in concussion protocol, Beagle out with broken forearm

Head coach Travis Green called the hit ‘a dirty play’

5 tips for talking to your kids about cannabis

Health officials recommend sharing a harm reduction-related message.

Most Read