Natur-L Nutrient Labs LLC, Scottsdale, AZ, has launched Potassium Xtra. Potassium Xtra targets a broad range of people requiring potassium supplementation, including the elderly, low-carb dieters, athletes or those who lose electrolytes by sweating or taking diuretics. Potassium Xtra is natural and organic and comes in a powdered form to be mixed with beverages, and delivers over 33% elemental potassium.