Which foods can provide vitamin D?
The skin makes vitamin D under ultraviolet B (UVB) radiation; food provides another source. Foods that naturally contain vitamin D, UV-treated mushrooms and foods with vitamin D added (fortified foods) can all contribute. Both sources can be considered together, and food sources matter throughout the year. If you rarely get outdoors or sunlight mainly reaches you through ordinary window glass, pay attention to food sources without waiting for better weather.
Start with foods you eat and enjoy. Some fatty fish usually provide more vitamin D than egg yolks or liver. For milk, plant drinks and similar products, check the label for fortification and amounts. Food sources can be considered throughout the year; there is no need to wait until the 30° seasonal condition is met.
The table uses NIH ODS examples from US foods to illustrate portions and contributions, not measurements of Chinese products. 3 ounces is about 85 grams; cup and item measures retain the source basis and are not equal weights. Species, farming, processing and formulations affect content.
Scroll the table horizontally; read each column in context.
| Food and source conditions | Reference serving | Vitamin D (micrograms) |
|---|---|---|
| Cooked farmed rainbow trout | About 85 g (3 oz) | 16.2 |
| Cooked sockeye salmon | About 85 g (3 oz) | 14.2 |
| UV-exposed raw white mushroom slices | Half a cup | 9.2 |
| US vitamin D-fortified milk (2% fat) | 1 cup | 2.9 |
| Atlantic sardines canned in oil, drained | 2 sardines | 1.2 |
| Scrambled egg; vitamin D is in the yolk | 1 large egg | 1.1 |
| Braised beef liver | About 85 g (3 oz) | 1.0 |
| Light tuna canned in water, drained | About 85 g (3 oz) | 1.0 |
Foods described as containing vitamin D can provide very different amounts per serving. Do not apply UV-treated mushroom values to ordinary mushrooms, or US fortified milk values to ordinary milk in China. Check the label or matching information for the food you buy.
Conceptual illustration; not to scale.
Read labels to compare amounts per serving
When shopping, identify the food and whether vitamin D has been added. Then check whether the amount is listed per serving, per 100 g or per 100 mL, as shown on the label. For mushrooms, check UV-treatment information or matching vitamin D data; do not apply the table values to ordinary mushrooms. Check the actual labels on milk and plant drinks rather than assuming a product is fortified based on its category.
Suppose one drink label says “per 100 mL, 1 microgram of vitamin D”. A 250 mL carton would then contain 2.5 micrograms. Suppose another product says “per 250 mL serving, 2 micrograms”; compare the same 250 mL amount. These label values are hypothetical examples; they do not describe a specific brand or recommend drinking a full carton.
Micrograms and international units (IU) are different units: 1 microgram of vitamin D equals 40 IU. Therefore, 2.5 micrograms equals 100 IU. Align units and portions, then consider ingredients, allergy information and the overall diet; a higher amount per serving is not automatically a better choice for you.
Conceptual illustration; not to scale.
Choose food sources that fit your eating habits
For a household that eats fish, choose a suitable fatty fish within an ordinary meal alongside familiar vegetables and staples. Check species and processing rather than assign one value to all fish. This integrates a source into a meal, not an extra large meal or a requirement to eat fish every day.
For an ovo-lacto vegetarian, retain an egg in a familiar breakfast and check whether the milk or plant drink is explicitly fortified. Egg yolks usually contribute relatively little; one egg does not mean your sources are sufficient. Consider the product’s formulation and your own diet when choosing fortified drinks.
For someone avoiding animal foods, check suitable fortified plant drinks or foods. Use mushroom content only when treatment conditions match the data. If suitable sources are limited, discuss your usual diet and questions with a nutrition professional; do not treat ordinary vegetables or unfortified drinks as dependable vitamin D sources.
These choices help you identify sources; eating a particular food does not establish that your needs are met. Supplements are another oral source. The shopping and meal suggestions here concern food; ask a qualified professional about whether supplements are appropriate for your circumstances.
How can you pay attention to food sources under the 30° prompt?
Start with foods you usually buy. Check the fish species when shopping and whether your breakfast drink has vitamin D added, then choose a suitable food for an everyday meal. SUNANSWER's rule is to pay more attention to dietary vitamin D sources when the local daily maximum solar elevation is strictly below 30°. This prompt does not mean that you are deficient in vitamin D.
Planning outings and meals as seasons change
See how window glass, clothing and season affect production conditions