Vitamin D is the “sunshine vitamin” — your skin makes it from sunlight, yet most of the world falls short, especially through winter and at higher latitudes. Very few foods carry much of it naturally: oily fish lead by a wide margin, followed by egg yolks, with smaller amounts in fortified milk and UV-grown mushrooms. Because it behaves more like a hormone than an ordinary nutrient, keeping your blood level topped up supports not only bone strength but muscle function and a well-regulated immune system.
What is Vitamin D?
Vitamin D is a fat-soluble vitamin that plays a critical role in helping the body absorb calcium and supporting bone strength, muscle function and immune defence. While many general diets overlook it, maintaining optimal levels of Vitamin D is frequently tracked by people working to optimize their 25-Hydroxyvitamin D.
Top Foods High in Vitamin D
A data-driven breakdown of the foods with the highest concentration of Vitamin D per 100 g.
| Food | Vitamin D | % DV |
|---|---|---|
| Mackerel | 16.1 µg | 80.5% |
| Rainbow Trout | 15.9 µg | 79.5% |
| Sardines | 4.8 µg | 24% |
| Eggs | 2 µg | 10% |
| Whole Milk | 1.3 µg | 6.5% |
| Tuna (canned, light) | 1.2 µg | 6% |
| Skim Milk | 1.2 µg | 6% |
| Kefir | 1 µg | 5% |
| Cheddar Cheese | 1 µg | 5% |
| Cod | 0.9 µg | 4.5% |
| Parmesan | 0.5 µg | 2.5% |
| Mozzarella | 0.4 µg | 2% |
How Vitamin D Impacts 25-Hydroxyvitamin D
Research links diets rich in Vitamin D to changes in 25-Hydroxyvitamin D. Optimizing intake of these foods can support healthy 25-Hydroxyvitamin D levels via supplying the precursor the liver and kidneys convert into calcitriol and store as circulating 25-hydroxyvitamin D.
Scientific references & clinical evidence
This guide is built on peer-reviewed research — verify the primary sources below.
Written by the Nutrition Encyclopedia team · medically reviewed by Dr. Sunaina Tariq, MBBS
Last updated 22 June 2026
How we source & verify data · Medical disclaimer
Nutrition values are approximations compiled from public food-composition databases (USDA FoodData Central) and are provided for educational purposes only — not medical advice.
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