I love authentic Hoisen sauce descended from chinese piss, and I love authentic San Francisco heirloom sourdough bread descended from flour and potato and lucky fermentation over 130 years ago.
TL/DR: Just piss if you need a tiny amount of yeast that loves to live in humans. If you want yeasts that do not love to live in humans, you can find yeast in lots of places.
try 0 points 3.8 years ago
Interesting, but laborious.
Mongolian desert peoples for thousands of years, when seeking yeast (black bean starter for hoisen sauce, etc) use human piss!
YEAST IS TAKEN from initial burst of male human urine to collect yeast from inside urethra.
Written in thousand year old ancient texts, but they did not know the magic of this piss was from yeast.
You also can use piss, and avoid cultivating wild yeasts from flower blossoms and fruits.
For exotic classic sourdough you will need to steal heirloom starter or get lucky.
more than 50 species of lactic acid bacteria (mostly Lactobacillus spp.) and more than 20 species of yeast in official bakers sourdough starters :
https://www.sciencedirect.com/science/article/abs/pii/S092422440400192X
I love authentic Hoisen sauce descended from chinese piss, and I love authentic San Francisco heirloom sourdough bread descended from flour and potato and lucky fermentation over 130 years ago.
This one is 125 years of constant bubbling :
http://archive.naplesnews.com/community/a-taste-of-history-125-year-old-sourdough-starter-has-been-good-to-area-bread-aficionado-ep-91583090-331153381.html
TL/DR: Just piss if you need a tiny amount of yeast that loves to live in humans. If you want yeasts that do not love to live in humans, you can find yeast in lots of places.