The Rural Voice, 2000-05, Page 15Scrap Book
Study looks at
hemp foods'
THC levels
A new U.S. study is looking
into the effect of trace levels of
tetrahydrocannabinols or THC in
hemp food products, a move that
might help Canadian producers
hoping to break into the U.S.
market.
There is some evidence low
levels of THC, the psychoactive
compound in hemp's cousin
marijuana can create "false
positives" in workplace drug tests.
said Berkeley, California
researcher Gero Leson in speaking
to the Hemp 2000 conference in
Winnipeg. Since all major
employers in the U.S. do random
testing for drug use among
employees, and screen new
applicants with drug tests, false
positives can be a problem.
The study aims to establish how
much THC in food causes
problems in the drug tests.
Leson said 15 professionals
with no previous exposure to THC
consumed a tablespoon of blended
hemp and canola oil for 10 days.
The volunteers provided urine
samples before they started the
test, during the last two days of the
test and afterwards.
They repeated the test four
times with different low doses of
THC. Leson said the samples were
analyzed using the common
workplace tests, as well as a more
extensive test.
The flowers of female hemp
plants produce resins that contain
THC. The resin sticks to the out-
side of the hemp seed hull, and
some resin makes it into hemp
food products.
In Canada, whole hemp seeds
have trace amounts of THC
ranging from 2.5 to 10 parts per
million, depending on the variety
of hemp and the cleanliness of the
seed, Leson said. Shelled seeds
have THC levels below one p.p.m.
and oil levels can range from four
to 15 p.p.m.0
— Source: Western Producer
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