Chemists: Chocolate can throw off potency of marijuana tests

Associated Press

How much marijuana is really in that pot brownie? Chocolate can throw off potency tests so labels aren’t always accurate, and now scientists are trying to figure out why.

In states where marijuana is legal, pot comes in cookies, mints, gummies, protein bars – even pretzels. These commercial products are labeled with the amount of high-inducing THC. That helps medical marijuana patients get the desired dose and other consumers attune their buzz.

But something about chocolate, chemists say, seems to interfere with potency testing. A chocolate labeled as 10 milligrams of THC could have far more and send someone to the emergency room with hallucinations.

The latest research on chocolate, to be presented at a San Diego meeting this week, is one example of chemistry’s growing role in the marijuana industry. Besides chocolate’s quirks, chemists are working on extending shelf life, mimicking marijuana’s earthy aroma and making products safer.

The marijuana business is at a crossroads in its push for legitimacy. The federal government still considers marijuana illegal, yet more than 30 U.S. states allow it for at least medical use. Even in those states, there are no recognized standard methods for testing products for safety and quality.

Marijuana contains hundreds of chemicals, including cannabinoids such as THC and CBD, a trendy ingredient with unproven health claims. Some pose challenges when they’re processed. Chocolate is a good example.