On Sunday, the DNA testing company 23andMe revealed a new genetic analysis that it says will tell its customers if they have an elevated risk of developing the most common, and preventable, form of diabetes. The report\u2014which has not been cleared by the FDA and is not intended to diagnose type 2 diabetes\u2014arrives as the disease is becoming an intractable public health crisis in the US. One in four healthcare dollars goes to treating diabetes and its related complications.