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Tue, July 14

How much pot in that brownie? Chocolate can throw off tests

In this Friday, Aug. 16, 2019, photo, chemist David Dawson pours pieces of a cannabis-infused chocolate bar into a vial as he demonstrates testing for THC and other chemicals at CW Analytical Laboratories in Oakland, Calif. Chemists are trying to solve a scientific mystery involving marijuana brownies. Chocolate seems to throw off test results for potency. That could be dangerous for consumers looking to relax, not hallucinate. (AP Photo/Jeff Chiu)

In this Friday, Aug. 16, 2019, photo, chemist David Dawson pours pieces of a cannabis-infused chocolate bar into a vial as he demonstrates testing for THC and other chemicals at CW Analytical Laboratories in Oakland, Calif. Chemists are trying to solve a scientific mystery involving marijuana brownies. Chocolate seems to throw off test results for potency. That could be dangerous for consumers looking to relax, not hallucinate. (AP Photo/Jeff Chiu)

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