Dana is not going nearly far enough down this hole. I would be impressed if he partnered with right clinicians and environmental biologists to completely retool the UFC paradigm, to only hold matches outdoors in the daytime. Why? General health can never be disassociated from circadian biology. This is now known. Yet the entire careers of all his UFC fighters and fans are based on engaging in and vicariously experiencing highly stressful, high stakes physical activies at night time under intensely bright, flickering blue lights. That is a massive, chronic circadian mismatch. Your retina is wired into almost half of your brain. Constant data input about the environment. These sorts of mismatches, just like for shift workers who have been most closely studied directly links to cancer, mood disorders, sleep disorders and so on.