Frequently Asked Questions about the Most Reliable Source of Vitamin D in the Diet What is the most reliable source of vitamin D in the diet? The most reliable source of vitamin D in the diet is through the consumption of foods that naturally contain it, such as fatty fish like salmon, mackerel, and sardines. These fish are excellent sources of vitamin D and can provide a significant portion of your daily requirement. Learn more about vitamin D sources Can vitamin D be obtained from sunlight? Yes, sunlight is another important source of vitamin D. When your skin is exposed…