I tried the next frontier in cancer screening. I'm dubious.

Zoë Meyers for BI I watch as my crimson-red blood quickly fills two small glass vials, then gets packed into an ice-cold sleeve to be shipped off to a cancer-hunting lab. I've just completed my first cancer blood draw. There's about two teaspoons worth here, and I'm shelling out $824 to get it analyzed. (A seasonal discount brought it down from the listed price of $950.) The process is simple and close to painless. A phlebotomist comes to your house, draws a little blood, you check the paper...