Check the listing for details. Fermaid O Yeast Nutrient - 2 oz (56.7 g) - Make Wine Cider Mead Kombucha At H.... Condition: New. Listed at 16.03 USD. About This Item: INCLUDES: 1 pack (2 oz / 56.7 g) of Fermaid O Yeast NutrientFERMAID O contains 100% natural yeast derived components rich in organic nitrogen and essential vitamins and minerals. It does not contain any inorganic nitrogen (e.g. no DAP). No UREA is used anywhere in the production of Fermaid OFERMAID O has the highest level of YAN (mg/g) permitted by the OIV monograph for yeast autolysates (OIV-OENO-496-2013). Lipid content (from rehydration products), high quality YAN, vitamins and minerals are key factors that are provided by FERMAID OWith its high content of organic nitrogen, Fermaid O can help winemakers achieve steady fermentations, while limiting temperature peaks. Add 20 g/hL at the end of the lag phase and another 20 g/hL around 1/3 sugar depletion