Save $30 on your gut health test kit from Ombre Lab: http://tryombre.com/Adam | Thanks to Ombre for sponsoring this video! 2008 paper in which Turkish scientists found 50ºC for 24 hours is the best time and temp for yeast autolysis: https://www.researchgate.net/publication/248578559_Utilisation_of_spent_brewer's_yeast_for_yeast_extract_production_by_autolysis_The_effect_of_temperature 1916 paper in which American scientists found that yeast extract cured beriberi in pigeons fed only white rice, because B vitamins: https://www.google.com/books/edition/American_Journal_of_Pharmacy/MUwfAQAAIAAJ?hl=en&gbpv=1&dq=nutritional+yeast&pg=PA411&printsec=frontcover#v=onepage&q=nutritional%20yeast&f=false 1995 book chapter covering Justus Von Liebig's experiments with yeast extract: https://www.google.com/books/edition/Cooks_Other_People/lpOqTUucwhUC?hl=en&gbpv=1&dq=Justus+von+Liebig+yeast&pg=PA247&printsec=frontcover 2002 press release from the Marmite company covering their history (much more thorough than what's currently on their website): http://webarchive.loc.gov/all/20021113013604/http://www.accomodata.co.uk/marmite.htm Vegemite. There, I said it.