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

Little variety in THC levels with different cannabis strains, says UBCO 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

Okanagan RCMP look for owners of various keys located during arrest

RCMP seek to reunite the owners of various keys found at the arrest of suspects in a stolen vehicle.

VIDEO: This is what buying legal pot in B.C. looks like

Take a look inside B.C.’s first and only legal pot shop located in Kamloops

BC Green already planning Princeton expansion

Company purchases ore land in industrial park

Don’t be dazed and confused about cannabis legalization

Sitting down with an Okanagan lawyer to clear the haze of marijuana rules

10 things still illegal in the new age of recreational cannabis

Pot is legal – but there are still a lot of rules, and breaking some could leave you in jail

Mellow opening to B.C.’s only legal pot shop

About five people lined up early for the opening of the BC Cannabis Store in Kamloops.

VOTE: Nature in Focus reader’s choice photo contest

The Penticton Western News Reader’s Choice photo contest

BC Ferries begins taking debit in two-month pilot project

Company is giving customers option to use Interac on two-month trial on select vessels

Caregivers banned from smoking, growing cannabis around children-in-care: MCFD

Ministry has limited cannabis use for caregivers, stating it may “pose a risk to children and youth.”

Cheaper strains sell out within minutes on online BC Cannabis Store

Province says new strains will become available in the coming months

Only 40% of B.C. car dealerships have electric cars available: report

Researchers found buyers frustrated at the lack of options

VIDEO: Millionaire Lottery returns to give back and win big

Since 1996, Millionaire Lottery has raised $52 million for the VGH+UBC Hospital Foundation

Baby boomer buba shares heartfelt novel with Okanagan audience

Pauline Daniel will be at Vernon’s Bookland and library Oct. 20

Test case challenges a politician’s right to block people from Twitter account

3 people say Watson infringed their constitutional right to freedom of expression by blocking them

Most Read