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Excess sodium consumption increases blood pressure. [15] [18] Some studies suggest a U-shaped association between salt intake and mortality, with increased mortality associated with both excessively low and excessively high salt intake. [7] [8] [19] Larger reductions in salt intake lead to larger decreases in blood pressure. [18]
Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23 Na. The free metal does not occur in nature and must be prepared from compounds.
The sodium–potassium pump, a critical enzyme for regulating sodium and potassium levels in cells. Sodium ions (Na +) are necessary in small amounts for some types of plants, [1] but sodium as a nutrient is more generally needed in larger amounts [1] by animals, due to their use of it for generation of nerve impulses and for maintenance of electrolyte balance and fluid balance.
In cell biology, extracellular fluid ( ECF) denotes all body fluid outside the cells of any multicellular organism. Total body water in healthy adults is about 50–60% (range 45 to 75%) of total body weight; [1] women and the obese typically have a lower percentage than lean men. [2] Extracellular fluid makes up about one-third of body fluid ...
Hypernatremia, also spelled hypernatraemia, is a high concentration of sodium in the blood. [3] Early symptoms may include a strong feeling of thirst, weakness, nausea, and loss of appetite. [1] Severe symptoms include confusion, muscle twitching, and bleeding in or around the brain. [1] [2] Normal serum sodium levels are 135–145 mmol/L (135 ...
Hypervolemia. Hypervolemia, also known as fluid overload, is the medical condition where there is too much fluid in the blood. The opposite condition is hypovolemia, which is too little fluid volume in the blood. Fluid volume excess in the intravascular compartment occurs due to an increase in total body sodium content and a consequent increase ...
Hyponatremia. Hyponatremia or hyponatraemia is a low concentration of sodium in the blood. [ 4] It is generally defined as a sodium concentration of less than 135 mmol/L (135 mEq/L ), with severe hyponatremia being below 120 mEq/L. [ 3][ 8] Symptoms can be absent, mild or severe. [ 2][ 9] Mild symptoms include a decreased ability to think ...
Salt poisoning is an intoxication resulting from the excessive intake of sodium (usually as sodium chloride) in either solid form or in solution ( saline water, including brine, brackish water, or seawater ). Salt poisoning sufficient to produce severe symptoms is rare, and lethal salt poisoning is possible but even rarer.