Novel functional sodium chloride compositions containing sodium gluconate as a substitute for the conventionally employed sodium chloride and being efficacious in preventing hypertension and the onset of complications thereof in the brain, heart, kidney; etc. These compositions are prepared by adding 40 to 400 parts by weight of sodium gluconate to 100 parts by weight of compositions containing 40 to 60% by weight of sodium chloride and 60 to 40% by weight of potassium chloride. These compositions are usable as a table salt for seasoning foods or in imparting the required saltiness to foods such as crackers or snacks. They are particularly appropriate for those who should cut down on the amount of salt in the diet.