'Salt has been wrongly demonized as a major contributor to high blood pressure. Factors that play a significantly greater role include your sodium-to-potassium ratio, and a high-sugar, processed food diet.
Symptoms of sodium deficiency may include muscle fatigue, spasms, cramps and heart palpitations. Such symptoms may disappear by adding more salt to your diet.
In the 1600s, the average person was consuming up to 100 grams of salt per day from salted cod, herring and meats. Today, most people get 10 grams of salt per day or less, yet we have far higher rates of hypertension.
Low-sodium diets may lower blood pressure. However, this reduction in blood pressure may not necessarily translate into a reduction in cardiovascular events. In fact, the reduction in blood pressure may actually be harmful by potentially increasing heart rate, as well as the risk of falls and fractures.
Low-sodium diets can also worsen your total cholesterol to high-density lipoprotein ratio and induce insulin resistance increasing both triglycerides and insulin.
Sub-populations that may need to monitor their salt intake are listed, as are conditions that increase your need for salt by increasing sodium loss. The benefits of salt loading before exercise are also discussed'.