Calcium is an essential mineral that plays a crucial role in various bodily functions. It's well-known for its role in maintaining healthy bones and teeth, but it's also involved in muscle function, nerve transmission, hormone secretion, and blood clotting. Natural sources of calcium include dairy products like milk, cheese, and yogurt, as well as leafy green vegetables such as kale and broccoli, nuts like almonds, and fish with edible bones like canned salmon and sardines. Additionally, calcium-fortified foods like certain types of orange juice and tofu can provide a boost of this vital nutrient. Calcium absorption is influenced by factors like vitamin D intake, stomach acid levels, and dietary fiber, so it's essential to consume a balanced diet to ensure adequate calcium absorption and utilization by the body.