Update: I was truly honored that Robert Naviaux used this cartoon in his presentation at the Stanford University ME/CFS symposium on August 12, 2017.

Researchers at the University of California San Diego School of Medicine have found a chemical signature in the blood of ME/CFS patients.  

According to Robert Naviaux, the primary researcher in the study," the signature is similar to the state of dauer, and other hypometabolic syndromes like caloric restriction, diapause and hibernation." 

If replicated, the study might provide hope of a biomarker for millions of sufferers worldwide.