Baby Soaps and Shampoos Trigger Positive Marijuana Tests
By Maia Szalavitz, TIME - Tuesday, June 19 2012
Soaps that were specifically associated with false-positive marijuana test results include Johnson & Johnson’s Bedtime Bath, CVS Night-Time Baby Bath, Aveeno Baby Soothing Relief Creamy Wash and Aveeno Baby Wash & Shampoo.
Other products, such as Johnson’s Head-to-Toe Baby Wash, CVS Baby Wash, Baby Magic and even standard hospital gel hand soap, also indicated the presence of marijuana metabolites when tested, but not at sufficient levels to qualify as a positive result according to the hospital lab’s standards.
The problem is almost certainly not limited to these products, however. Researchers also tested ingredients used widely in soaps and shampoos, including polyquaternium-11 and cocamidopropyl betaine, which both elicited positive marijuana test results. So far, there is no explanation as to why the chemicals interfere with the test’s function, but importantly, they aren’t intoxicating; they don’t cause symptoms of marijuana exposure in children. The researchers think minute amounts of the substances were simply washing off the babies’ skin into their urine samples and confounding the screens.
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White Paper: Drug Testing Results Often Inaccurate, Unreliable