Sodium is a vital electrolyte and mineral essential for various physiological functions in the human body. It helps regulate the balance of fluids in the body's cells and tissues, maintaining osmotic equilibrium to ensure that cells neither shrink nor swell excessively. Sodium ions are crucial for generating and transmitting electrical signals in nerves through a process known as the action potential, which enables nerve cells to communicate and is essential for muscle contractions, including those of the heart. Additionally, sodium works alongside potassium and calcium to ensure proper muscle function, aiding in muscle contraction and relaxation, making it essential for normal muscular activity.

Sodium also plays a significant role in blood pressure regulation by influencing blood volume. The kidneys regulate sodium levels by adjusting the amount excreted in urine, thus maintaining appropriate blood pressure. Sodium is naturally present in various foods and is commonly added to many processed foods. Major sources include table salt (sodium chloride), processed and packaged foods such as canned soups, snacks, and deli meats, dairy products like cheese and milk, seafood, and vegetables such as celery and beets.

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Lydbog: 28. september 2024