{"product_id":"mangrove-jacks-beer-yeast-kveik-m12","title":"Mangrove Jacks M12 Kveik Yeast 10g","description":"\u003cp\u003eM12 is a Norwegian farmhouse kveik strain that ferments cleanly at temperatures that would ruin any conventional ale yeast. At 30–42°C it produces a clean, fast result with very high flocculation, dropping the beer brilliantly clear within 24–48 hours of fermentation completing.\u003c\/p\u003e \u003cp\u003e\u003cb\u003eBest Suited To\u003c\/b\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAny ale style where fast turnaround or high-temperature fermentation is the priority\u003c\/li\u003e \u003cli\u003eIPA, Pale Ale, Porter, Stout, Farmhouse Ale\u003c\/li\u003e \u003cli\u003eAustralian summer brewing without temperature control — particularly Queensland, Northern Territory, and inland Western Australia\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cb\u003eSpecs\u003c\/b\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cstrong\u003eFermentation temp:\u003c\/strong\u003e 30–42°C optimal (can work down to 20°C with slower fermentation)\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eAttenuation:\u003c\/strong\u003e High\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eFlocculation:\u003c\/strong\u003e Very High\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eAlcohol tolerance:\u003c\/strong\u003e 15%+ ABV\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003ePitching rate:\u003c\/strong\u003e 1 sachet per 23L (under-pitching is well tolerated)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cb\u003eWhen to Choose M12\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eM12 is a utility yeast, not a style yeast. Choose it for speed, heat tolerance, or when you lack temperature control — not because it produces a distinctive style character.\u003c\/p\u003e \u003cp\u003eFor Australian brewers fermenting in a hot garage or shed during summer without active cooling, M12 is the practical answer. At 35–40°C, all other ale yeasts produce fusel alcohols; M12 does not.\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePractical Notes\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eNo starter required. Kveik is highly robust and tolerates under-pitching. At 35–42°C, fermentation can be complete within 24–48 hours — take a gravity reading before assuming it is done.\u003c\/p\u003e \u003cp\u003eAt 20–25°C M12 produces citrus and stone-fruit ester character. At 35–42°C it is nearly neutral — cleaner at high temperatures than you would expect from any other ale yeast.\u003c\/p\u003e \u003cp\u003eKeep refrigerated. Once opened, reseal and use within 7 days.\u003c\/p\u003e \u003cp\u003e\u003cem\u003eReviewed by the AHB Brewing Team — June 2026.\u003c\/em\u003e\u003c\/p\u003e","brand":"Mangrove Jacks","offers":[{"title":"Default Title","offer_id":41995024695373,"sku":"25032","price":12.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/8306\/0045\/files\/25032.jpg?v=1754075519","url":"https:\/\/www.australianhomebrewing.com.au\/products\/mangrove-jacks-beer-yeast-kveik-m12","provider":"Australian Home Brewing","version":"1.0","type":"link"}