Yes, eggs contain vitamin D, though the amount is modest. A single large egg provides roughly 44 IU of vitamin D when scrambled, which covers about 6% of the daily value. That makes eggs one of the few foods that naturally contain vitamin D, but you’d need to eat a lot of them to meet your daily needs from eggs alone.
How Much Vitamin D Is in One Egg
Almost all of the vitamin D in an egg sits in the yolk. A raw large egg yolk contains about 18 IU of vitamin D, while a scrambled whole egg delivers around 44 IU (1.1 mcg). The difference comes down to cooking method and measurement conditions, but the ballpark is the same: a single egg gives you a small fraction of what you need each day.
For context, the recommended dietary allowance for adults ages 19 to 70 is 600 IU (15 mcg) per day. The daily value used on nutrition labels is set even higher at 800 IU (20 mcg). So one egg gets you roughly 5 to 7% of the way there. Two eggs at breakfast bumps that to about 10 to 14%, a meaningful contribution but far from sufficient on its own.
Why Egg Vitamin D Is Unusually Well Absorbed
Eggs contain two forms of vitamin D that matter nutritionally. About 75% is standard vitamin D3, the same form your skin makes from sunlight. The remaining 25% is a pre-converted form called 25-hydroxyvitamin D3, which your body can use more directly because it skips the first processing step in the liver.
That pre-converted form appears to raise blood levels of vitamin D faster and more efficiently than standard vitamin D3. In one winter trial, people who ate enriched eggs daily maintained their vitamin D blood levels over eight weeks, while people eating standard commercial eggs (two or fewer per week) saw their levels drop. The fat in the yolk also helps, since vitamin D is fat-soluble and absorbs best when eaten alongside dietary fat.
Free-Range Eggs Have Significantly More
How the hen lives makes a real difference. Hens exposed to sunlight produce eggs with three to four times more vitamin D3 in their yolks compared to indoor-raised hens. In one study, yolks from hens with full outdoor access averaged 14.3 mcg of vitamin D3 per 100 grams of dry yolk, while indoor-only hens produced yolks with just 3.8 mcg per 100 grams. Hens that split time between indoors and outdoors fell in between at 11.3 mcg.
This makes sense: hens synthesize vitamin D through sun exposure on their skin and combs, just like humans do. The vitamin then gets deposited into the yolk. Labels like “free-range” or “pasture-raised” suggest more sun exposure, though the actual amount varies by farm. Interestingly, one large UK study found no measurable difference between cage, free-range, indoor free-range, and organic eggs when averaged across a full year of sampling, likely because “free-range” hens don’t always spend much time outside.
Cooking Retains Most of the Vitamin D
You don’t lose much vitamin D by cooking your eggs. Hard-boiling retains about 80 to 85% of the total vitamin D content. Frying keeps around 70 to 78%. Microwaving actually showed the highest retention for the pre-converted form of vitamin D, preserving nearly all of it. So regardless of how you prepare your eggs, the majority of the vitamin D survives cooking.
One small wrinkle: how you store eggs before cooking can affect retention. Eggs stored at room temperature before frying retained more vitamin D3 than refrigerated eggs that were then fried. The differences are minor enough that they shouldn’t change your habits, but they suggest that cooking eggs straight from the counter rather than cold from the fridge may preserve slightly more of the vitamin.
How Eggs Compare to Other Vitamin D Sources
Eggs are a convenient natural source of vitamin D, but they’re far from the richest. A 3-ounce serving of sockeye salmon delivers around 570 IU, roughly 13 times what one egg provides. Canned tuna offers about 150 IU per serving. Fortified milk and orange juice typically contain 100 to 120 IU per cup. A single egg falls below all of these, but it adds up when combined with other foods throughout the day.
Where eggs have an edge is consistency and accessibility. Most people eat eggs regularly, they’re inexpensive, and they don’t require any special preparation. The fat content of the yolk also creates ideal absorption conditions for vitamin D without needing to add anything else to the meal. If you eat two eggs daily alongside other vitamin D sources like fortified milk or fatty fish once or twice a week, you’re covering a reasonable share of your needs through food alone.
Vitamin D Enriched Eggs
Some commercial producers now sell eggs specifically marketed as vitamin D enriched. These come from hens fed diets supplemented with higher levels of vitamin D3 or its pre-converted form. The results can be dramatic: in research trials, enriched eggs reached up to 8.5 mcg of vitamin D per egg, nearly 340 IU. That’s roughly eight times the amount in a standard egg and more than half the daily recommended intake in a single egg.
These products aren’t available everywhere yet, but they’re becoming more common. If boosting your vitamin D through food is a priority, checking the label for vitamin D content is worthwhile, as the difference between a standard egg and an enriched one is substantial.