Ancient yeast from Ötzi is used to bake sourdough, with beer on the menu

What's happened

Researchers have harvested yeast from the 5,300-year-old Ötzi mummy and have baked a sourdough loaf that rose normally. They plan to explore beer brewing with the same strains, and note the yeasts are cold-adapted and may have origins dating back to Copper Age Europe.

What's behind the headline?

Key takeaways

The team has successfully used ancient yeast to bake sourdough, demonstrating that long-preserved microbes can remain viable under cold storage
Beer brewing is being considered as the next application, following bread
The work highlights the resilience of cold-adapted microbes and raises questions about how conservation methods influence ancient microbiomes

Implications for readers

If ancient yeast can be revived for food and drink, this could inspire new biotechnologies and historical food studies
The findings may prompt discussions on museum preservation practices and microbial survivability under long-term storage

How we got here

Ötzi the Iceman, found frozen in the Alps in 1991, has long been central to studies of Copper Age life. Recent work has focused on microbes preserved in his remains, revealing a dynamic ecosystem that includes ancient and modern microbes.

Our analysis

The Guardian reports that scientists have harvested yeast from Ötzi and baked sourdough, with plans to pursue beer brewing; NY Post corroborates the bread results and notes discussions with a German brewery; The Independent provides broader context on the microbiome and preservation challenges; all sources cite Mohamed Sarhan of Eurac Research

Go deeper

Could ancient yeast strains be used to recreate other Copper Age foods?
What preservation methods best maintain ancient microbes without enabling active growth?
Will beer experiments proceed with safety and regulatory oversight?