What about some added salt?Here is an expert on salt in the diet and what happens to it... Summary Sodium is an essential nutrient involved in fluid and electrolyte balance and is required at a very closely controlled extracellular concentration of 137-145 mmol/L for normal cellular function . The main function of sodium in the body is to maintain the transmembrane electrical potential with sodium on the outside of the (cell) membrane and potassium on the inside. This is crucial for the survival of all cells.  Salt is excreted totally passively by the glomeruli when the blood is filtrated in the kidneys. The excretion capacity is practically unlimited with 1 000 grams to 2 000 grams of salt per day . The major problem for the body and the kidneys is to reabsorb enough sodium (usually more than 99 % but less than 100 % of excreted sodium in glomeruli) from the primary urine to stabilize and maintain the normal level of sodium in blood and extracellular fluid at the precise level of 137-145 mmol/L . We are therefore unable to manipulate the blood pressure by manipulating the amount of sodium in the food. All excess of sodium intake is immediately excreted in the renal glomeruli and not reabsorbed in the renal tubuli. Any deficiency in sodium intake versus sodium excretion is almost immediately life threatening. It is totally safe to let us be guided by our gustatory system when we add salt and water to our food. We do have multiple sodium sensors and volume sensors in our body including a central processing unit closely controlling both sodium and water levels in the body. There is no scientific relationship between salt intake and blood pressure/hypertension. There is no way to manipulate the blood pressure by manipulating the salt intake.