Natural ways to increase vitamin d levels
Pro Research Analysisby 
Searched over 200M research papers
Sunlight Exposure and Vitamin D Synthesis
The most natural and effective way to increase vitamin D levels is through controlled exposure to sunlight. The skin produces about 90% of the body's vitamin D when exposed to ultraviolet (UV) rays from the sun. Encouraging regular, safe sun exposure is a key lifestyle change to prevent vitamin D deficiency and support bone and overall health. This approach is especially important because natural dietary sources of vitamin D are limited and often insufficient to meet daily needs on their own .
Dietary Sources of Vitamin D
Foods Naturally Rich in Vitamin D
Some foods naturally contain vitamin D, though in relatively small amounts. These include fatty fish (such as salmon, mackerel, and sardines), egg yolks, and certain types of mushrooms. Including these foods in the diet can help boost vitamin D intake, but may not be enough for everyone, especially in regions with limited sunlight Neill2021Aguilar-Shea2021.
Biofortified and Naturally Enhanced Foods
Recent research highlights the potential of biofortified foods—foods that have been naturally enhanced to contain higher levels of vitamin D. For example, eggs can be naturally enriched with vitamin D by modifying the hens' feed or exposing hens or egg products to UVB light. These enhanced eggs can significantly contribute to dietary vitamin D intake. Similarly, other animal-based foods like meat and fish can be biofortified to improve their vitamin D content, offering another natural dietary strategy to increase vitamin D levels Neill2021Barnkob2020.
Food Fortification and Vitamin D Forms
Fortifying common foods with vitamin D is another way to naturally increase intake. Studies show that vitamin D3 (cholecalciferol), the form found in animal-based foods and produced by the skin, is more effective than vitamin D2 (ergocalciferol) in raising blood vitamin D levels. Fortified foods such as juices and biscuits containing vitamin D3 have been shown to significantly improve vitamin D status, especially during winter months when sunlight exposure is limited Neill2021Tripkovic2017.
Lifestyle Changes for Natural Vitamin D Boost
Adopting lifestyle habits that promote regular sun exposure and a diet rich in natural and biofortified sources of vitamin D is recommended for maintaining healthy vitamin D levels. Universal screening for deficiency is not necessary for everyone, but those at risk should be encouraged to make these changes as a preventive strategy .
Conclusion
Natural ways to increase vitamin D levels include regular, safe sun exposure, consuming foods naturally rich in vitamin D, and choosing biofortified or fortified foods—especially those containing vitamin D3. These strategies are effective in supporting healthy vitamin D status and can help prevent deficiency, particularly in populations with limited sunlight or dietary intake Neill2021Aguilar-Shea2021Barnkob2020+1 MORE.
Sources and full results
Most relevant research papers on this topic