Calcium plays a critical role in muscle contraction and overall health. It is essential for the release of neurotransmitters that trigger muscles to contract. During contraction, calcium ions bind to proteins in muscle cells, allowing them to interact and shorten. Additionally, calcium contributes to bone health by promoting density and strength, thereby reducing the risk of fractures. Adequate calcium intake supports vital bodily functions, including nerve transmission and hormone secretion. Insufficient calcium levels can lead to muscle cramps and long-term health issues like osteoporosis.