Developed in 1995, SUCCEED! Electrolyte Caps have become The Gold Standard for Electrolyte Replacement. Of course, others have tried to imitate this formulation, but have failed to deliver a product as good as S! Caps. S! Caps are 100% electrolytes. Beware of imitations that use ineffective, non-electrolyte fillers such as the carbohydrate maltodextrin.