Iron content in fruit
Pro Research Analysisby 
Searched over 200M research papers
Iron Content in Different Fruit Types
Research shows that the iron content in fruits varies widely depending on the species and even the specific variety. For example, a study analyzing 37 fruit species in Sri Lanka found that iron content in fresh edible portions ranged from 0.1 to 1.1 mg per 100 grams, with underutilized fruits like Phyllanthus emblica (Indian gooseberry) ranking highest among those tested . Another study comparing Indian gooseberry and bilimbi found that gooseberry contains 2.5 times more iron than bilimbi, confirming its reputation as an iron-rich fruit . In red fruit (Pandanus conoideus), the iron content was measured at 1.339 mg per 100 grams, which is relatively high compared to many other fruits . Chinese date fruit (Ziziphus jujuba) contains about 0.67 mg iron per 100 grams when fresh, but this drops to about 0.33 mg per 100 grams after boiling, showing that cooking can significantly reduce iron content .
Iron Content in Commercial and Processed Fruit Products
Canned fruit juices and nectars can also contain notable amounts of iron. In a survey of 122 canned fruit juice samples, iron content ranged widely, with some apple and tomato juices containing up to 42.6 mg per kg. The packaging material (such as lacquered cans) can influence iron levels in the final product . Syrup made from karamunting fruit (Rhodomyrtus tomentosa) was found to have an iron content of 0.525 mg/L, indicating that processed fruit products can still contribute to dietary iron intake, though the concentration may differ from fresh fruit .
Methods for Measuring Iron Content in Fruit
Modern techniques such as near-infrared spectroscopy have been successfully used to predict iron content in both the peel and pulp of fruits like the ‘Huangguan’ pear, providing a non-destructive and efficient way to monitor iron levels during fruit development . More traditional methods, such as atomic absorption spectrophotometry and spectrophotometric thiocyanate methods, are also commonly used for precise quantification of iron in fruit samples 2367.
Factors Affecting Iron Content and Bioavailability in Fruit
The iron content in fruits can be influenced by agricultural practices, fruit variety, and post-harvest processing. For example, the application of melatonin in peach trees has been shown to increase iron uptake and accumulation in the fruit by affecting both plant metabolism and soil chemistry . Additionally, boiling or other cooking methods can reduce the iron content in fruits, as seen in Chinese date fruit .
Bioavailability is another important factor. While fruits generally contain less iron than vegetables, herbs, or spices, their vitamin C content can enhance iron absorption in the body. Studies have shown that consuming vitamin C-rich fruits and fruit juices is associated with higher hemoglobin and serum ferritin levels, especially in premenopausal women . However, the fiber content of fruits may influence iron stores, with fiber-poor fruits and juices being more effective at increasing iron status .
Iron Content in Fruits Compared to Other Plant Foods
When compared to vegetables, herbs, and spices, fruits generally have lower iron content. For example, a study in Sarajevo found that fruits contained between 2.91 and 39.27 mg iron per kg, which is less than most vegetables, herbs, and spices tested . Despite this, fruits remain an important source of dietary iron, especially when consumed as part of a varied diet that includes vitamin C-rich options to boost absorption 410.
Conclusion
Fruits contain varying amounts of iron, with some species like Indian gooseberry and red fruit offering higher levels than others. Processing and cooking can reduce iron content, but modern measurement techniques allow for accurate assessment. While fruits are not the richest plant source of iron, their vitamin C content can significantly enhance iron absorption, making them a valuable part of a balanced diet for maintaining healthy iron levels 2345+2 MORE.
Sources and full results
Most relevant research papers on this topic