April 21, 2018

Cronkite News

Warning: Genetic health tests aren’t always good for you

Federal guidelines that govern genetic health tests were relaxed last year, raising concerns about safety and accuracy ofgenetic testing, an Arizona legal expert says.

“To be able to understand our own bodies and our own futures is wonderful. It’s just a matter of us making sure that we aren’t getting ahead of the science – that we’re not spending millions of dollars on tests that aren’t yet proven to be valid” and don’t offer clinical insights, said Christopher Robertson, associate dean for Research and Innovation for Law at the University of Arizona.

Robertson and Charles Piller, an investigative journalist for Science magazine, said most people are unaware of the disadvantages of genetic tests but warned there are several to watch out for, including emotional and psychological distress. They gave advice during a session of the Association of Health Care Journalists conference last week in Phoenix.

Test results can be wrong

Tests can show a genetic predisposition to a condition, such as breast cancer or Alzheimer’s, Robertson said, but that doesn’t mean the findings are accurate. Some people reading test results are unqualified to do so. And certain genes can trigger allergies to foods and medicines but false readings of those can endanger someone’s health.
“You can do real damage, if (tests are) not read properly,” Robertson said.
Piller reported and wrote about a genetic testing company that worked on testing for about 50,000 participants, which is worrisome because accurate and quality testing takes time, is costly and tedious, he said.

Your doctor may have an ulterior motive

Doctors can receive money from a genetic testing company but may not disclose that when suggesting a patient take a test. And physicians may be biased toward products they sponsor, which can lead to unnecessary testing, Piller said.

Government regulation is limited

The FDA in 2017 announced less strict regulations for genetic health tests. Robertson said deregulation means consumers are less protected. Pricing isn’t standard, so that means prices could soar and people can’t determine if the tests are worth the money. And the quality of a company quality is unknown under loosened guidelines.