Earlier this month, the EU banned the use of a chemical called TPO in gel nail polish, but it’s still allowed in US products.

Q. My doctor prescribed a Cologuard instead of a colonoscopy. No one mentioned how often Cologuard could result in false positive test results as mine did. So, a colonoscopy was necessary after all, ...

A. We searched unsuccessfully for a simple answer to your straightforward question. The company that makes Cologuard, a DNA stool test for colorectal cancer, suggests that the rate of false positives ...