Gotta be significantly more than 20 percent. I'm 5'7" and pretty close to what he claims his weight and percent body fat are (he says he's 5'8"). Suffice to say I have considerably more muscle mass and lack the circumferal paunch/love handles. I would put him much closer to 26% than 13%. http://ketogains.com/wp-content/uploads/2015/09/BF-Male.jpg Edit: Added an eyeballing guide for reference. For the record I'm not into keto, that was just the first decent visual reference I found on Google.