Vitamin D is a nutrient that keeps bones strong and helps improve the immune system and overall health. Unfortunately, most people do not get enough of it. Thus, the best vitamin D-rich foods you should add to your diet today will help you fill the gap. Here are some of the best sources for consideration:

Fish liver oils are best vitamin D-rich foods you should add to your diet today. Cod liver oils are counted among the richest and most concentrated sources of vitamin D. If you take a tablespoon full, you have...