As [noted](https://www.health.com/how-to-eat-eggs-for-vitamin-d-absorption-12059069) by Health, citing dietitian Caitlin Beale, one egg contains about **1.2 micrograms, or 49 IU of vitamin D** — approximately 6% of the recommended daily amount. Vitamin D plays a role in the immune system and helps the body absorb calcium, which is necessary for bone health. ### Want Vitamin D? Keep the Yolk Egg whites are often perceived as the most "diet-friendly" part of the egg; however, in terms of vitamin D, they are practically useless: almost all of this vitamin is concentrated in the yolk. The yolk has another advantage. Vitamin D is fat-soluble, so the presence of fats aids in its absorption. Almost all the fat contained in the egg is also found in the yolk. The article cites the results of a 2015 study: participants absorbed 32% more vitamin D from a supplement when taken with fat-containing food rather than with fat-free food. However, this was specifically about dietary supplements, not vitamin D directly from eggs, so the authors do not suggest directly applying these results to eggs. ### Is It Necessary to Fry Eggs in Oil? According to the available data, there is no point in adding more oil for the sake of vitamin D. The fat already present in the yolk may be sufficient for its absorption. Olive or canola oil may have other dietary benefits, but there is currently no convincing evidence that additional fat significantly improves the absorption of vitamin D specifically from eggs. ### Boiled, Fried, or Omelet? The method of preparation can affect how much vitamin D remains in the product. In one study, **scrambled eggs and poached eggs retained over 90% of their initial vitamin D content**. After hard boiling, about 80–85% remained, while frying left around 70–78%. But there is a significant caveat: the researchers used vitamin D-enriched eggs and measured the amount of vitamin remaining after cooking. They did not study how much vitamin was actually absorbed by the human body. Therefore, it is too early to declare poached or omelet eggs as the "best" cooking method for obtaining vitamin D. ### Eggs Alone Are Not Enough Even if you eat eggs with the yolk daily, it is difficult to meet the body's entire vitamin D requirement solely from them. Other dietary sources of vitamin D mentioned in the material include fatty fish, particularly salmon and trout, as well as fortified dairy and plant-based beverages and some fortified breakfast cereals. If a person is not getting enough vitamin D, it is best to discuss the need for testing and supplementation with a doctor. The main takeaway is simple: if you eat eggs for vitamin D, do not throw away the yolk. Almost all the vitamin D in the egg and the fat that aids in its absorption is found in the yolk. There is no need to specifically pour oil over scrambled eggs for better absorption.
