Vitamin A Reduces the Inhibition of Iron Absorption by Phytates and Polyphenols

1998 ◽  
Vol 19 (1) ◽  
pp. 3-5 ◽  
Author(s):  
Miguel Layrisse ◽  
María Nieves García-Casal ◽  
Liseti Solano ◽  
María Adela Barón ◽  
Franklin Arguello ◽  
...  

In searching for an explanation for the rapid response to iron-fortification programmes, we focused on the interaction of vitamin A and inhibitors of iron absorption from a basal breakfast containing bread from either pre-cooked maize flour or wheat flour plus cheese and margarine. These breads were labeled with either 59Fe or 55Fe. These experiments demonstrated that vitamin A prevented the inhibiting effect of polyphenols and phytates on iron absorption. It was also demonstrated that vitamin A had the same effect on iron absorption as phytase.

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Flavia Andrew Kiwango ◽  
Musa Chacha ◽  
Jofrey Raymond

Purpose This study aims to update the information on the current status of micronutrient fortification for iron, zinc, folic acid and vitamin A in mandatory fortified food vehicles such as cooking oil, wheat and maize flours in Tanzania. Design/methodology/approach A cross-sectional study was conducted in five regions to analyze the adequacy of micronutrient fortification in mandatory fortified food vehicles. Samples of fortified edible oil (n = 19), wheat flour (n = 12) and maize flour (n = 5) were sampled conveniently from local markets and supermarkets. Samples were analyzed for vitamins (vitamin A and folic acid) and mineral (iron and zinc) content using high-performance liquid chromatography and microwave plasma-atomic emission spectrometer, respectively. Compliance acceptable ranges between the minimum and maximum levels for each nutrient were used as a basis for compliance. Findings The results showed that 83.3% and 80% of wheat and maize flour samples, respectively, complied with iron fortification standards (p = 0.05). Only 25% of wheat flour samples and 40% of maize flour samples were within the acceptable ranges for zinc fortification (p = 0.05). Nearly 17% and 20% of wheat and maize flour samples, respectively, were within the acceptable ranges for folic acid fortification (p = 0.05). Moreover, about 10.5% of the analyzed cooking oils were adequately fortified with vitamin A (p = 0.05). Except for iron in wheat and maize flours, the levels of other micronutrients in mandatorily fortified foods were out of acceptable ranges. Originality/value Mandatory fortification is still far from the established standards, and this calls for a review of the current fortification strategies regarding standards, training, monitoring and enforcement in Tanzania.


2017 ◽  
Vol 6 (2) ◽  
pp. 39-44
Author(s):  
Gilian Tetelepta ◽  
Priscillia Picauly

Tongka langit banana contain high nutrients including pro vitamin A and a total of carotene. However, it is also a perishable product, and would deteriorate if not processed or not completely consumed. Therefore, this banana should be processed into diverse products. It can be processed into intermediate product such as flour, which can be further applied in crackers making. This research was conducted in two stages. First stage was the making of tongka langit banana flour and the second was crackers making. The crackers were made from tongka langit banana flour and wheat flour having different ratios, i.e. 20 %: 80 %; 40 %: 60 %; 60 %: 40 %; 80 %: 20 %. Variables observed on crackers including moisture, ash, protein, fat, dietary fiber and carbohydrate contents, as well as organoleptic properties of taste, aroma, colour, texture and overall likeness. Results showed that ratio of banana flour to wheat flour of 40%:60% produced crackers with moisture, ash, protein, fat, fiber, and carbohydrate contents of 4.60%, 4.46%, 6.64%, 17.54%, 1.18% and 4.60%, respectively. In addition, organoleptic test revealed that crackers made from 40% banana flour and 60% wheat flour were mostly liked by panelists in terms of taste, colour, aroma, texture and overall likeness. Keywords: crackers, tongka langit banana   ABSTRAK Pisang tongka langit kaya akan kandungan gizi antara lain mengandung provitamin A dan total karotenoid yang sangat tinggi. Namun pisang tongka langit mudah mengalami kerusakan jika tertunda pengolahannya atau tidak habis dikonsumsi, oleh karena itu perlu dilakukan upaya diversifikasi terhadap pisang tongka langit. Pisang tongka langit dapat diolah menjadi bahan setengah jadi berupa tepung yang dapat diaplikasikan menjadi produk crackers. Penelitian ini dilakukan dalam dua tahap, tahap I adalah pembuatan tepung pisang tongka langit dan tahap II adalah pembuatan crackers dari tepung pisang tongka langit dan tepung terigu dengan empat taraf perlakuan perbandingan subtitusi tepung pisang tongka langit dan tepung terigu yaitu masing-masing 20 %: 80 %; 40 %: 60 %; 60 %: 40 %; 80 %: 20 %. Pengamatan yang dilakukan pada crackers yaitu analisa kadar air, abu, protein, lemak, serat pangan, karbohidrat dan uji organoleptik yang meliputi rasa, aroma, warna, tekstur dan tingkat kesukaan secara keseluruhan. Hasil penelitian menunjukkan bahwa formula crackers tepung pisang tongka langit 40% : 60% memiliki nilai kadar air berkisar antara 4,60%, kadar abu 4,46%, protein 6,64%, lemak 17,54%, serat 1,18% dan karbohidrat 4,60%. Sedangkan uji organoleptik menunjukkan bahwa crackers tepung pisang tongka langit 40% : tepung terigu 60% memiliki rasa, warna, aroma, tekstur dan tingkat penerimaan secara keseluruhan yang disukai panelis. Kata Kunci: crackers, pisang tongka langit


2012 ◽  
pp. 61 ◽  
Author(s):  
Fabíola Gabriel ◽  
Suen ◽  
Julio Sergio Marchini ◽  
Dutra de Oliveira
Keyword(s):  

1988 ◽  
Vol 59 (2) ◽  
pp. 205-213 ◽  
Author(s):  
Mohamed El Guindi ◽  
Sean R. Lynch ◽  
James D. Cook

1. Radio-iron absorption measurements were performed in healthy volunteer subjects to assess the availability of fortification Fe added to various bread products.2. When ferrous sulphate was used as a fortifier, Fe absorption from a traditional Egyptian flat bread (Baladi) averaged only 16% of that observed with European bread. This difference was attributed to the high extraction flour used to prepare Baladi bread.3. The inhibiting effect of Baladi bread was largely eliminated by adding EDTA to the flour before baking.


1997 ◽  
Vol 48 (1) ◽  
pp. 41-49 ◽  
Author(s):  
M. E. Van Stuijvenberg ◽  
M. Kruger ◽  
C. J. Badenhorst ◽  
E. P. G. Mansvelt ◽  
J. A. Laubscher

2011 ◽  
Vol 144 (1-3) ◽  
pp. 1318-1326 ◽  
Author(s):  
Daniel López de Romaña ◽  
Fernando Pizarro ◽  
Doricela Diazgranados ◽  
Armando Barba ◽  
Manuel Olivares ◽  
...  

2018 ◽  
Vol 240 ◽  
pp. 43-50 ◽  
Author(s):  
Youna M. Hemery ◽  
Arnaud Laillou ◽  
Laura Fontan ◽  
Vincent Jallier ◽  
Regina Moench-Pfanner ◽  
...  

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e70613 ◽  
Author(s):  
Yara Koréissi-Dembélé ◽  
Nadia Fanou-Fogny ◽  
Diego Moretti ◽  
Stephan Schuth ◽  
Romain A. M. Dossa ◽  
...  

2012 ◽  
Vol 142 (11) ◽  
pp. 1997-2003 ◽  
Author(s):  
Sumithra Muthayya ◽  
Prashanth Thankachan ◽  
Siddhivinayak Hirve ◽  
Vani Amalrajan ◽  
Tinku Thomas ◽  
...  

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