"Fart did a fart and made it into tea"- great description of shit tea!!!
Dave Asprey is the Bulletproof guy who used his own body for 10 years to step outside of medical guidance since it wasn't doing him any good. He saved his own life, lost 150 lbs and created the Bulletproof diet centered around Bulletproof coffee (I'm a devoted drinker of this). He has created marvelous formulas and systems of information that are absolutely invaluable, I've been so impressed by him as I've learned more and more over the past 2 years.
I know less about Tim Ferris except that he is a motivational speaker and also interested in performance.
Enjoy!