A study (PDF) featured in the June 2012 print edition of the medical journal Clinical Biochemistry claims that tiny traces of certain baby soaps and shampoos can trigger drug test results showing the presence of marijuana, which can in some cases cause state authorities to remove a child from parental custody.
Researchers at the University of North Carolina began testing soaps after local nurses noticed an unusual uptick in positive drug tests on infants. Their conclusions, first relayed to the journal’s online subscribers in March, may have far-ranging implications for any government agency or corporation that has used drug testing on citizens or employees.
The study claims that five soaps in particular can trigger false positive results on drug tests, including Johnson & Johnson’s Bedtime Bath, Johnson & Johnson Head-to-Toe Baby Wash, Aveeno Baby Soothing Relief Creamy Wash, Aveeno Baby Wash Shampoo and CVS Night-Time Baby Bath.
But it doesn’t stop there.
Researchers were also able to trigger false positive results for marijuana with common hospital gel soap and several other products, which led them to discover that two specific chemical compounds can completely confound commonly used immunoassay drug tests and produce false positives for marijuana.