The mineral essential for muscle contraction and nerve function is calcium. Calcium plays a crucial role in transmitting signals from nerves to muscles, enabling movement. During muscle contraction, calcium ions are released from the sarcoplasmic reticulum, facilitating the interaction between actin and myosin filaments. Additionally, calcium supports various physiological functions, including bone health, blood clotting, and hormonal secretion. Adequate calcium intake from dietary sources such as dairy products, leafy greens, and fortified foods is vital for maintaining proper muscle and nerve function.