What is a ketone salt? It's simply beta-hydroxybutyrate bound to a mineral—a salt. A lot of common ketone salts are sodium, magnesium, calcium ... Pros: relatively cheap, relatively available. [One] potential con is that if you actually look at the percentage of salt versus beta-hydroxybutyrate, you're eating a lot of mineral ... If you look at the label, oftentimes you're seeing like 200% of your daily recommended value for salt.