Vitamin C content in fruits
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Vitamin C Content in Fruits: Key Findings
High Vitamin C Fruits: Blackcurrant, Kiwifruit, and Strawberries
Among fruits, blackcurrants are especially rich in vitamin C, with average contents around 137 mg per 100g fresh weight, while strawberries contain about 60 mg per 100g, though this can range from 56 to 99 mg depending on the variety and year . Kiwifruit also shows high vitamin C levels, with the common Hayward variety containing about 65.5 mg per 100g, and other Actinidia species and cultivars ranging from 29 to 185 mg per 100g. Some varieties, like Sanuki Gold and certain A. arguta cultivars, can have more than three times the vitamin C of Hayward .
Citrus Fruits: Oranges, Lemons, and Grapefruits
Citrus fruits are well-known sources of vitamin C. Oranges typically have the highest vitamin C content among common citrus, with values ranging from about 44 to 58 mg per 100g depending on the measurement method. Grapefruit and lemons follow, with grapefruit containing 26–49 mg per 100g and lemons 31–44 mg per 100g. Limes and related fruits have lower vitamin C, with musk lime at the bottom of the range (about 17–19 mg per 100g) . Seasonal and varietal differences can cause significant variation in these values Nagy1980Phillips2018.
Other Fruits: Berries, Apples, and Less-Known Species
Strawberries are consistently among the top sources of vitamin C, with levels around 55–60 mg per 100g Hägg1995Popova2019. Grapefruit, pears, green apples, blueberries, quince, bananas, plums, white grapes, and figs show a descending order of vitamin C content, with figs having the lowest among those tested . Some less-known fruits, such as the service tree (Sorbus domestica), can have exceptionally high vitamin C content, reaching over 1100 µg/g (about 111 mg per 100g), while others like persimmon are much lower (about 7 mg per 100g) .
Seasonal and Storage Effects on Vitamin C in Fruits
Vitamin C content in fruits can vary significantly with season, storage, and processing. For example, oranges sampled in winter can have higher vitamin C than those in summer, and the content can fluctuate widely even within the same fruit type depending on the time of year and growing conditions . Frozen storage can destroy about 28–34% of vitamin C in berries like blackcurrants and strawberries . Similarly, boiling or prolonged storage of fruit juices leads to substantial vitamin C loss, with up to 40–50% lost after opening and storing commercial juices for a week at 4°C Devolli2021El-Ishaq2015.
Methods for Measuring Vitamin C in Fruits
Vitamin C in fruits is commonly measured using titration, spectrophotometry, and high-performance liquid chromatography (HPLC). While titration methods are widely used and provide comparable results, HPLC is considered more accurate and specific Ramli2017Khadka2023Popova2019. Both methods confirm the general ranking of fruits by vitamin C content, though absolute values may differ slightly.
Conclusion
Fruits are important sources of vitamin C, with blackcurrants, kiwifruit, and strawberries among the richest. Citrus fruits like oranges, lemons, and grapefruits also provide significant amounts, though content varies by variety, season, and storage. Less common fruits can sometimes surpass popular ones in vitamin C content. Storage and processing can greatly reduce vitamin C levels, so consuming fresh fruits is best for maximizing intake. Measurement methods may yield slightly different results, but the overall trends in vitamin C content among fruits are consistent across studies.
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