Supplemental nutrients for propagation & brewing. Great for wine, mead & cider. A blend of vitamins, minerals, inorganic nitrogen, organic nitrogen, zinc, phosphates & other trace elements that will benefit yeast growth & complete fermentation. Additional nutrients are most valuable during yeast propagation & sluggish or stuck fermentations. Supplementing with nutrients will reduce lag time, improve viability & provide consistent attenuation rates. 1/2 tsp (2.2 Grams) per 5 gallons (19 liters) of must. Dissolve Wyeast Nutrient in warm water. Add solution to must with yeast. Stability:1 year if stored in airtight container in a cool environment. Simi Valley Home Brew stocks only the freshest Wyeast Yeast, & we have over 30 strains in stock in our shop, so if there is something your looking for & don’t see ASK were here to help! Wyeast Wine Yeast Nutrient Blend 1.5 Ounce Vial