As far back as 2015, Leafly, reported on the topic of CBD and drug testing. According to their research, the urine drug screen for THC is known to have very little cross-reactivity to other cannabinoids that are not psychoactive, such as CBD(cannabidiol). This is good news for “normal” consumers of CBD/hemp oil.
However, people that use doses of a cannabinoid-rich hemp oil product above 1000-2000 mg of hemp oil daily could theoretically test positive during the initial testing.
Most of the high-quality, reliable CBD-rich hemp oil products contain much less THC than marijuana. Hemp contains anywhere from 1/10th to 1/300th of the THC concentration found in marijuana. An individual consuming 1000-2000 mg per day of hemp oil would thus consume approximately 3-6 mg of THC. This could result in a positive urine test. On the other hand, there is some data demonstrating that at daily doses of 0.5mg of THC from 3-5 servings of most commercial CBD-rich hemp oil products, the positive urine screen rate is < 0.2%. Again, most servings of typical high-quality, high-purity CBD-based hemp oil products contain well below 0.1mg of THC and therefore have over 400-600 times less THC than marijuana products.
A patient that uses a high-quality hemp-based product at the standard serving size is highly unlikely to test positive for THC.
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