The primary nutrient in dairy products is calcium. Dairy products, such as milk, cheese, and yogurt, are significant sources of this essential mineral. Calcium is crucial for maintaining strong bones and teeth and plays a vital role in various bodily functions, including muscle contraction, blood clotting, and nerve signaling. In addition to calcium, dairy products also provide protein, vitamins such as B12, and other important nutrients. For those who are lactose intolerant or avoid dairy for dietary reasons, there are alternative sources of calcium, including fortified plant-based milk, leafy greens, and various nuts and seeds.