An undercover investigation by the Government Accountability Office found that four genetic testing companies delivered contradictory predictions for the same person's DNA. Investigators also found that the test results often contradicted patients' actual medical histories.
The GAO reported their findings at a Congressional hearing to scrutinize companies that mass-market personalized DNA tests.
The Energy and Commerce Committee will later hear testimony from three genomic testing companies: 23andMe, Navigenics and Pathway Genomics Corp.
