Barleymilk is the ONLY plant-based milk using an upcycled ingredient: spent grain from beer-brewing (hence the beer pun). When barley is used to make beer, only the sugars (starches) are extracted. What is leftover after that process is spent grain, which typically goes to landfills as waste or given to livestock as feed. What we discovered was that, without all those starchy sugars, spent grain has highly concentrated amounts of protein and - when given a second chance - becomes an incredibly rich, nutritious, tasty milk.