What is a common source of dietary calcium?

Dairy products are a well-known and significant source of dietary calcium. They include foods such as milk, cheese, and yogurt, which are commonly fortified and contain high levels of calcium essential for various physiological functions, particularly for bone health and metabolic processes. Individuals meeting their recommended calcium intake often rely on dairy as a primary source since these products provide calcium in a highly bioavailable form, meaning the body can easily digest and absorb it.

While leafy green vegetables can also contribute some calcium to the diet, they may contain oxalates, which can inhibit calcium absorption. Whole grains and red meat provide minimal amounts of calcium compared to dairy, making them less favorable choices for meeting calcium requirements. Thus, the prominence of dairy products in calcium content makes them the correct answer in this context.