I have been using this shit for a while. My buddy that used to work at the local store here said that the old lady that used to own it designed the nutrient. For wine making but I use it for beer. No boiling. I put it right in the fermenter. It's almost antidotal evidence at this point but my beer do tend to finish dry with this stuff. The last beer I forgot to add it and it ended at 1.01. The beer before was almost the same in grain bill size and mash method. With this stuff - 1.004. I don't know if anyone knows about it so this is a heads up. I would actually be interested to hear what you guys think about it if you decided to give it a try.