Dietary sources of vitamin c
Pro Research Analysisby 
Searched over 200M research papers
Main Dietary Sources of Vitamin C
Vitamin C is primarily found in fruits and vegetables, making these food groups the most important dietary sources worldwide. Fruits, especially citrus fruits like oranges, are consistently identified as leading contributors to vitamin C intake in various populations. In Spain, for example, fruits (mainly oranges) provide about 51% of dietary vitamin C, while fruiting vegetables such as tomatoes and sweet peppers contribute another 20%. Similarly, in China, both light and dark vegetables, fruits, and tubers together account for over 97% of total daily vitamin C intake.
Brassica vegetables, which include broccoli, cabbage, and Brussels sprouts, are also highlighted as rich and affordable sources of vitamin C, widely consumed across different cultures and socioeconomic groups. Potatoes and tomatoes are additional sources, though they generally provide less vitamin C per serving compared to citrus fruits and leafy greens.
Vegetables as Key Vitamin C Sources
Vegetables, particularly those from the Brassica genus, are not only rich in vitamin C but also contain other health-promoting compounds. The vitamin C content in these vegetables can be influenced by factors such as crop variety, growth conditions, and storage methods. Consuming these vegetables as part of a whole food matrix enhances the bioavailability of vitamin C compared to taking purified supplements.
Dark green leafy vegetables, tubers, and other non-citrus vegetables are also significant contributors to vitamin C intake, especially in populations with lower fruit consumptionJia2018Garcı́a-Closas2004. Increasing vegetable intake is recommended to boost vitamin C levels and support overall health.
Fruits as Major Vitamin C Contributors
Citrus fruits, such as oranges, lemons, and grapefruits, are universally recognized as top sources of vitamin CGarcı́a-Closas2004Sauberlich2018. Other fruits, including strawberries, kiwis, and guavas, also provide substantial amounts. In Mediterranean diets, citrus fruits alone can account for up to 68% of certain vitamin C-related nutrients.
Other Food Sources and Considerations
While fruits and vegetables are the main sources, some tubers like potatoes and certain fruiting vegetables (e.g., tomatoes, sweet peppers) also contribute to vitamin C intakeJia2018Garcı́a-Closas2004Sauberlich2018. The vitamin C content in these foods can be affected by food processing, storage, and preparation methods, which may lead to nutrient lossesDomínguez-Perles2014Dehghan2007.
Conclusion
In summary, the best dietary sources of vitamin C are fruits (especially citrus fruits), a wide variety of vegetables (notably Brassica and leafy greens), and some tubers and fruiting vegetables. These foods should be consumed regularly to meet daily vitamin C requirements and support overall health. Increasing the intake of both fruits and vegetables is a practical and effective way to ensure adequate vitamin C intake for most populationsDomínguez-Perles2014Jia2018Garcı́a-Closas2004+2 MORE.
Sources and full results
Most relevant research papers on this topic