A common dietary source of vitamin D is fatty fish, such as salmon, mackerel, and sardines. Other sources include fortified foods like cereals, milk, and orange juice. Vitamin D is essential for maintaining healthy bones, as it aids in the absorption of calcium. Furthermore, sun exposure can also generate vitamin D in the skin. Adequate levels are crucial for overall health, and it is necessary to monitor intake, especially in populations with limited sun exposure or higher risk of deficiency.