Ass science is really going places
the gas behind the foul, rotten-egg-smelling stench, known as hydrogen sulfide, can help protect aging brain cells from Alzheimer’s disease.
While the smelly gas is highly toxic in large quantities, smaller doses may provide some serious health benefits, Johns Hopkins researchers noted in a study published in an issue of the Proceedings of the National Academies of Science.
You smell your own farts, while I microdose on hydrogen sulfide 
I mean depending on your diet your ass could produce zero ppm of H2S
You're better off shoving your head into an open oil well, which I do regularly