NOTE: I get a lot of emails asking me whether treatment X is evidence-based or a scam. This one was different. Zachary Hoffman had done his homework and had already answered the question for himself (at least, as well as it could be answered with the existing published evidence). I asked him to write up his findings as a guest post for SBM. This is a great example of how a layman can figure things out for himself using little more than google-fu and critical thinking skills. I hope it will be an inspiration to others who may not have thought they were qualified to do what we do on SBM.
Recently a friend alerted me to something called “Whole-Body Cryotherapy” which has been making the rounds on Facebook and is being promoted by many athletes and celebrities. I had only heard of cryotherapy in the context of freezing off a wart, but I was about to find out there was so much more. She explained that subjecting your entire body to extreme cold (-200˚F!) for a few minutes a day was a virtual panacea, with weight-loss, tissue repair, and beauty treatments as the target market. My limited background in biology hadn’t quite prepared me for understanding why subjecting oneself to cold air could possibly help treat any illness.
For instance, up here in Boston, I ride my bike all winter long, and on a particularly cold day, after a 5 degree ride, no one has commented that I seem particularly trim, or that my face is looking unusually beautiful. Unfortunately, a few days ago while riding my bike, I took a spill and mushed my hand pretty good. However, the cold winter air hasn’t done much to alleviate that pain or stop my right hand from being twice the size of the left. In any case, it seemed to me that I’d have to give this a closer look before I made any comments.
A quick search on Google led me to a website, Cryohealthcare, Inc. The website is aesthetically pleasing and has plenty of information about how this treatment can transform your life. To top it off, there are lots of endorsements from professional teams and athletes. It appears that for about $65 a pop you can subject yourself to unfathomably low temperatures and enjoy a whole-body tingle when you step out (when I was younger I used to jump in the snow and then get into a hot tub, so I get the appeal). A quick scroll down and we see indications for injury recovery, pain mitigation, and athletic performance, among others, followed nicely by the FDA quack Miranda warning. (more…)