New at-home colon cancer test for sale

A new at-home test for colon cancer went on sale today.

The Mayo Clinic was behind the development of Cologuard, which looks for a certain form of DNA.

It's non-invasive and doesn't take as much preparation as other tests.

Doctors hope it will encourage more Americans to get screened.

If it is positive patients will need to get a colonoscopy, which is still the gold standard for detecting colon cancer.