Orange juice and iron absorption
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Orange Juice, Ascorbic Acid, and Iron Absorption
Multiple studies show that orange juice, which is high in ascorbic acid (vitamin C), significantly increases the absorption of non-heme iron from foods and supplements. The ascorbic acid in orange juice helps convert iron into a form that is easier for the body to absorb, and this effect is much stronger than that of juices with little or no ascorbic acid, such as apple juice 1356+1 MORE.
Orange Juice vs. Apple Juice for Iron Absorption
Research in both children and adults consistently finds that orange juice enhances iron absorption more than apple juice. In children, meals with orange juice led to higher iron absorption compared to meals with apple juice, especially when iron was provided as ferrous fumarate or in fortified foods 13. However, some studies found that children still absorbed iron well from meals with either juice, suggesting that while orange juice is better, apple juice does not prevent iron absorption 24.
Mechanisms: Role of Ascorbic and Citric Acid
The main reason orange juice boosts iron absorption is its high ascorbic acid content. Studies show a strong correlation between the ascorbic acid content of fruit juices and the amount of iron absorbed. Citric acid, also present in orange juice, further enhances this effect, especially when combined with ascorbic acid 35. Other fruits and juices with low ascorbic acid, like apple juice, have little or no effect on iron absorption .
Iron Supplements and Orange Juice
Taking iron supplements with orange juice, rather than water or other drinks, results in much higher iron absorption. This is true for both children and adults, and especially important for groups at risk of iron deficiency, such as pregnant women. Studies in pregnant women show that taking iron tablets with orange juice leads to greater increases in hemoglobin levels compared to taking iron with water 810. The effect is attributed to the vitamin C in orange juice, which helps the body use the iron more efficiently.
Practical Implications: Meal and Supplement Timing
To maximize iron absorption, it is best to take iron supplements in the morning with orange juice and away from coffee or tea, which can inhibit iron absorption. Consuming iron with orange juice alone can result in up to four times more iron being absorbed compared to taking it with coffee or a full breakfast 67.
Conclusion
Orange juice is a powerful enhancer of iron absorption due to its high ascorbic and citric acid content. It is more effective than apple juice and many other fruit juices. For people needing to improve their iron status, especially children and pregnant women, pairing iron-rich foods or supplements with orange juice is a simple and effective strategy to boost iron absorption and help prevent iron deficiency 1235+4 MORE.
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Most relevant research papers on this topic
Orange But Not Apple Juice Enhances Ferrous Fumarate Absorption in Small Children
Orange juice enhances iron absorption from ferrous fumarate in small children, while apple juice does not, with a 2-fold increase in absorption in children older than 6.
Effect of dietary factors and time of day on iron absorption from oral iron supplements in iron deficient women
Consuming iron supplements in the morning, away from meals or coffee, and with an ascorbic acid-rich food or beverage increases iron absorption by 4-fold in iron deficient women.
Effect of different drinks on the absorption of non-heme iron from composite meals.
Orange juice significantly increases iron absorption, while tea and coffee reduce it, while milk, beer, and Coca-Cola have no significant effect.
The Difference Of Effectiveness way to Consume Iron tablets toward haemoglobin level changes to pregnant women in second trimester at the Sindang Barang community health center in 2017
Taking iron tablets and drinking lemon juice together is more effective than taking iron tablets alone in increasing hemoglobin levels in second trimester pregnant women.
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