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2008 paper in which Turkish scientists found 50ºC for 24 hours is the best time and temp for yeast autolysis: https://www.researchgate.net/publicat...

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/...

1995 book chapter covering Justus Von Liebig's experiments with yeast extract: https://www.google.com/books/edition/...

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/2002111...

Vegemite. There, I said it.