Interesting News From Provo

I was reviewing news.google.com when I saw the following story float to the top

Tests on a patient’s hair might help doctors diagnose eating disorders – BYU research

I just want to know how a doctor is going to do this? Talk to the patient then all the sudden point in a different direction. “OH MY GOODNESS! What’s that green thing over there!” Then snipp off some hair?

Or is hair collection going to be standard from now on?

I also found it interesting that BYU is leading the research in this department.