Full-body MRIs are all the rage. We take a look at three major companies offering such testing.

Function Health said it acquired full-body MRI scanning company Ezra. Function offers a $499 annual subscription where members complete more than 160 blood tests and track their results over time.

An advantage of whole-body MRIs over CTs is that they use magnets and radio waves, which eliminate the type of radiation linked to cancer. But that doesn’t mean they’re risk-free or the right choice ...