Fifteen years ago, Dave Asprey took a look at himself and didn't like what he saw: he was about 100 pounds overweight, had chronic nosebleeds, slept poorly, and felt like crap. But unlike most of us, he had the time and financial resources to focus his considerable intelligence on his predicament. What he discovered about his own condition turned out to be applicable to the rest of us: chronic infections, fungal contamination, vitamin deficiencies, dietary craziness—you name it. Bio-hack your way to health.