A common dietary source of calcium is dairy products such as milk, yogurt, and cheese. These foods are particularly rich in calcium, which is essential for maintaining strong bones and teeth, as well as supporting various bodily functions like muscle contraction and nerve transmission. For individuals who are lactose intolerant or avoiding dairy, alternative sources include leafy greens, fortified plant-based milk, and certain fish like sardines and salmon. Ensuring adequate calcium intake is crucial for overall bone health.