A good dietary sources of vitamin D

Vitamin D acts as a steroid hormone in the body, and 41.6% of the population in the United States is deficient or low in it. Fish and fish products are one of the top sources of vitamin D in the diet.

The largest concentrations are seen in fatty fish such as salmon and herring. A single 4-ounce (113-gram) portion of grilled salmon has about 100% of the daily vitamin D requirement. Fatty fish like salmon is a great source of vitamin D. One 3.5-ounce (100-gram) serving of farmed Atlantic salmon contains 526 IU of vitamin D, or 66% of the DV, according to the United States Department of Agriculture (USDA) Food Composition Database. Some fish oils, such as cod liver oil, are also rich in vitamin D, with a single tablespoon providing more than 200% of the Daily Value (DV). If you don't get enough sun and don't eat fatty fish on a regular basis, a vitamin D supplement may be beneficial.