Grain Neutral Spirits or "GNS" refers to high alcohol, highly distilled or rectified spirits made from grain that are neutral in aroma and flavor—basically very high proof vodka. Formally these spirits must be at or greater than 190º proof ( 95% ABV) or higher, but consumer-facing brands are generally 160º proof and higher. GNS is often purchased from large commercial distilleries by spirits producers and rectifiers to create other spirits like gins, vodkas, liqueurs, and blended whiskies. It is also used as an alcohol base for punches, tinctures, and cocktail bitters, or as a solvent or "industrial alcohol".