The next leap in health screening might not come from a new scan, but from a tiny sample you’d normally toss in the trash.

When David Edges's wife spotted a faint brown line on his toenail, he didn't think it was anything to worry about. But Kelly, 47, a skin specialist in the beauty industry, was instantly concerned, ...

Michael Wieser (left) and Aaron Goodarzi show a toenail clipping collection bag that participants will use to send in their toenails for analysis. At 47-years of age, Emi Bossio, was feeling good ...