We’ve all heard it; whether we haven’t been spending enough time in the sun, or our diet has been lacking in healthy options, chances are we’ve been told that we need more vitamin D in our diets. Vitamin D has been known to do many essential things for our body, like regulate calcium, absorb phosphorus, and help our immune system fight disease. But despite this vitamin being essential to our diets, new research is finding that many of us just aren’t getting enough of it. In fact, one study found that the current Recommended Dietary Allowance, or how much we should be eating a day, is 10 times lower than it actually should be.

But for those of us who aren’t going outside as much as we like, where exactly can we find this key nutrient? Even though not many foods naturally contain adequate levels of vitamin D, there are still some out there, especially those that have been fortified, that can help up our daily dose. To see the full list of all the foods that can help you get your vitamin D fix, click "View Slideshow" above.

Source: Veugelers P, Ekwaru J, et al. A Statistical Error in the Estimation of the Recommended Dietary Allowance for Vitamin D. Nutrients. 2014.