Which of the following minerals is lost as a result of excessive sweating?

Excessive sweating leads to the loss of several essential minerals, including sodium, calcium, and magnesium. Sodium is particularly noteworthy because sweat is primarily composed of water and salt; thus, significant sweat loss can lead to a depletion of sodium levels in the body. This is important for maintaining proper fluid balance, nerve function, and muscle contraction.

Calcium loss through sweat is less pronounced compared to sodium, but it still occurs. Calcium is crucial for various physiological functions, including bone health and muscle contractions, making it important to replace any lost calcium, especially during prolonged physical activity.

Magnesium, being involved in over 300 biochemical reactions in the body, including energy production and muscle function, can also be lost through sweat. Adequate magnesium levels are vital for preventing muscle cramps and ensuring effective metabolism.

Since all three minerals—sodium, calcium, and magnesium—are lost during excessive sweating, it is entirely accurate to recognize option D as the correct choice in this context. Understanding that these minerals are lost emphasizes the need for proper hydration and electrolyte replacement in athletes and individuals engaging in strenuous activity.