The most important composition of salt substitute is potassium chloride. Certain salt substitutes available commercially possess potassium bitartaratemono potassium glutamate, tri calcium phosphate, potassium iodide, adipic acid, mineral oil, fumaric acid and silicon di oxide. They generally contain negligible per cent of sodium or no sodium at all. They also fail to taste like the common salt used.
The potassium in potassium chloride contains radioactive beta-gamma emitter potassium 40. Potassium chloride increases the synthesis of saliva and enhances the taste of food. Water is not retained. Salt substitutes are not recommended for people suffering from kidney diseases, diabetes and cardiac failure. Individuals on certain medications too are restricted from intake of these salts. A physician's advice is recommended. Decrease in potassium excretion results in hyperkalemia, which is a fatal condition.
At home level, lime juice is a good substitute. Herbs are very effective in replacing salt in various recipes. A mixture of oregano, thyme, garlic powder, lemon peel, cayenne pepper, dried basil, onion powder, sage, parsley and mace are dried and powdered in equal quantities. It is an excellent substitute for salt in salads and other recipes.
answered by Dr C