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Kveik yeast are extremely diverse genetically, presenting characteristics that are not typical in other brewing yeasts <ref name="larsblog_analysis">[http://www.garshol.priv.no/blog/349.html "Analysis of farmhouse yeast (kveik)." Larsblog. Lars Marius Garshol. 09/06/2016. Retrieved 09/06/2016.]</ref>. Most farmhouse brewers have started buying their yeast, but some kveik cultures have been passed down from generations and inherited by modern farmhouse brewers in Norway who still use this yeast today and brew with traditional farmhouse methods. Much of the knowledge about kveik and historical farmhouse brewing in Norway has been researched and publicized by Lars Marius Garshol on his blog, ''[http://www.garshol.priv.no/blog/ Larsblog]'', and in the book ''Beer and Brewing Traditions in Norway'' by Odd Nordland (1969). In recent years kveik cultures have been sent to yeast labs for propagation and distribution to brewers around the world <ref name="larsblog_kveik">[http://www.garshol.priv.no/blog/264.html Kveik: Norwegian farmhouse yeast. Larsblog. 11/07/2013. Retrieved 01/14/2016.]</ref>. The use of kveik is one of the many traditional methods still used by a few farmhouse brewers and homebrewers in Norway, along with other historical methods such as infusing the mash or boil with juniper (''Juniperus communis'' <ref>[http://www.garshol.priv.no/blog/368.html Lars Marius Garshol. "The juniper mystery". Larsblog blog. 02/02/2017. Retrieved 12/13/2018.]</ref>), not filtering, using short fermentations to achieve low carbonation, the use of wood-fired copper or iron kettles, and sometimes not boiling the wort ([[Kveik#Raw_Ale|Raw Ale]]) <ref>[http://www.garshol.priv.no/blog/303.html Maltøl, or Norwegian farmhouse ale. Larsblog. 10/11/2016. Retrieved 01/14/2016.]</ref>. Kveik can also be used effectively to ferment a wide range of non-farmhouse styles, such as New England IPA and English beer styles, as well as cider, mead, and mash/wash for distillation.
Farmhouse yeasts from other countries such as Lithuania and Russia have been found to be both genetically different and express different fermentation profiles than the kveik yeasts of Norway, and are therefore not referred to as "kveik". See the [[Landrace_Yeast|Farmhouse Yeasts in Other Countries]] pageand [https://www.garshol.priv.no/blog/420.html "Farmhouse yeast: what do we know?"] by Lars Marius Garshol.
For a comprehensive list of kveik and other landrace farmhouse yeasts, see the [http://www.garshol.priv.no/download/farmhouse/kveik.html Farmhouse Yeast Registry maintained by Lars Garshol].