No "loss of sex drive, disordered eating, social isolation, amenorrhea, low testosterone, and an unbalanced life" are the side effects of having such unnaturally low body fat and it is 100% accurate. WTF, why is everyone having a go at factual information just because some fatass posted it to try and misrepresent the information that it is displaying?  Of course there is middle ground, there is six different sections giving indicative categories of rough body fat percentages.  He could have expanded it even further if he added even fatter fucks. It is an indication of what most people will have to do to reach those levels of body fat percentage, nothing more.