10. Mackerel
Mackerel is a popular fish that is high in Vitamin D3, a fat-soluble vitamin that is essential for bone health and overall well-being. Vitamin D3 is found naturally in some foods, but mackerel is an especially potent source of this nutrient. One 3-ounce serving of mackerel fillet contains an impressive 585 IU of Vitamin D3, which is over 75% of the recommended daily value. Additionally, mackerel is a good source of protein, omega-3 fatty acids, and other vitamins and minerals. Eating mackerel on a regular basis can help ensure that you are getting enough Vitamin D3 in your diet.