They are naturally low in salt and calories. If you drink alcoholic beverages, do so in moderation. Excessive alcohol consumption has been associated with high blood pressure. Eating too little salt is not generally a concern for healthy people. If you are being treated for a chronic health problem, ask your doctor about whether it is safe for you to reduce your salt intake.
Some table salt is fortified with iodine.
Your body can adjust to prevent too much sodium loss when you exercise heavily or when it is very hot. However, if you plan to reduce your salt intake and you exercise vigorously, it is sensible to decrease gradually the amount of salt you consume.