4. Eggs
Yet another great source of vitamin D is eggs. The yolk of a single large egg contains around 41 IU of vitamin D, which is around 10 percent of the daily recommended intake. If you eat more than one egg per serving, you should certainly see a difference in your vitamin D levels.
To get the most and the best vitamin D possible from eggs, opt for varieties that come from free-range chickens, as they spend more time in the sun. In addition to vitamin D, you will also get a wealth of other vital nutrients from eggs. They contain protein, vitamin A, vitamin B12, iron, vitamin B6, magnesium, and even calcium! That means that by eating eggs, you can increase the production of healthy red blood cells in your body, strengthen your immune system, boost the strength of your muscles, and improve your heart health, too.