Sodium is a vital nutrient in the human diet for regulating cellular activity and nervous system function. This substance plays an important role in enzymatic functions and muscle contraction.
The best sources of sodium are common salt, homemade soups, cabbage, apples, egg yolks, cereals and bananas. Even carrots, baking powder and baking soda, turnips, leafy vegetables and dried peas are good sources of sodium.
Sodium deficiency occurs with increased sodium excretion due to diarrhea, vomiting, severe sweating in hot weather, or adrenal insufficiency. Symptoms of deficiency include vomiting, anorexia, muscle weakness, and painful muscle contractions.