Foods high in vitamin D, ranked by IU per serving

Salmon (~570 IU), trout (~645 IU), and sardines (~180 IU) per serving lead; UV mushrooms and fortified milk fill the gaps. The per-serving ranking, and why food rarely covers the daily target alone.

1. 01

   Rainbow trout: ~645 IU per 100 g

   The densest common food source: ~645 IU of vitamin D per 100 g cooked (USDA), enough to cover the 600 IU/day adult RDA in a single serving. Farmed trout is widely available and low mercury. Like all the fish on this list, the vitamin D comes packaged with EPA+DHA omega-3 and protein, so it does double duty. One or two servings a week is the single most effective dietary move for vitamin D.

2. 02

   Salmon (farmed or wild): ~570 IU per 100 g

   A 100 g serving of farmed Atlantic salmon supplies ~570 IU (USDA), nearly a full day's RDA; wild salmon can run higher still in some analyses. Very low mercury (~0.022 ppm, FDA), so it is the default oily fish for vitamin D as well as omega-3. Two servings a week keep a meaningful baseline of dietary vitamin D and clear the general-health omega-3 target at the same time.

3. 03

   Canned sardines: ~180 IU per serving

   A standard can of sardines supplies roughly ~180 IU of vitamin D (USDA), lower than fresh fatty fish but shelf-stable, cheap, and among the lowest mercury of any fish. The edible bones also add calcium, the mineral vitamin D exists partly to help absorb. A useful supporting source rather than a standalone: it takes several cans to match one salmon serving on vitamin D alone.

4. 04

   UV-exposed mushrooms: highly variable

   Mushrooms are the one meaningful plant source, but only when exposed to UV light, which converts ergosterol to vitamin D2. UV-treated mushrooms (labeled as such) can deliver several hundred IU per serving, while ordinary dark-grown supermarket mushrooms supply almost none. D2 also raises blood levels less effectively than the D3 in fish (Tripkovic et al. 2012). Check the label for UV treatment; without it, do not count mushrooms as a vitamin D source.

5. 05

   Egg yolks: ~44 IU per large egg

   One large egg yolk supplies ~44 IU of vitamin D (USDA), all of it in the yolk, so whites contribute nothing. Pasture-raised or vitamin D-enriched eggs can run higher. Eggs are a convenient minor contributor: three eggs add ~130 IU, useful as part of a day's intake but far short of the RDA on their own. A steady breakfast source rather than a primary one.

6. 06

   Fortified milk, plant milk, and cereal

   Most naturally low-vitamin-D foods reach the diet through fortification. A cup of fortified cow's or soy milk adds ~100-120 IU, fortified orange juice similar, and fortified breakfast cereals ~40-80 IU per serving (USDA; product-dependent). These are small, reliable top-ups rather than big hitters, and amounts vary by brand, so read the label. Stacking a few fortified foods across a day can add a few hundred IU toward the target.

7. 07

   Cod liver oil: ~450 IU per teaspoon

   A traditional concentrated source: one teaspoon of cod liver oil supplies ~450 IU of vitamin D along with vitamin A and EPA+DHA (USDA). Because it also carries a large dose of preformed vitamin A, it sits between a food and a supplement and should not be taken in large amounts without accounting for that vitamin A load. Useful in modest, measured doses, not by the tablespoon.

8. 08

   Why food rarely covers the target alone

   Add it up and the problem is clear: outside of eating fatty fish several times a week, the everyday diet struggles to reach even 600 IU/day, and the 1,000-2,000 IU/day maintenance range clinicians commonly use is out of reach from food. Skin synthesis from sun fills the gap in summer but stalls in winter and at higher latitudes. This is why vitamin D is the general-population supplement with the strongest case; compare tested D3 products on $/1000 IU in our best vitamin D supplement ranking, and set your number in our daily vitamin D guide.