View clinical trials related to Iron Absorption.
Filter by:Fifteen female study participants will be enrolled in a randomized crossover study to measure fractional and total zinc and iron absorption from four common bean (Phaseolus vulgaris) varieties with varying phytate and polyphenolic contents. Phytate, the storage form of phosphorus in plants, and polyphenols, which contribute to the varied colors of common beans, are natural components of the beans and can reduce zinc and iron bioavailability from these foods.
The aim of this project is to investigate whether the increased iron and zinc bio-accessibility values in sprouted or hydrothermally processed wheat is reflected in an increased iron and/or zinc absorption in human subjects after consuming breakfast flakes derived from such processed wheats.
Iron requirements increase significantly during pregnancy. Current recommendations for iron intake in pregnant and lactating women (PLW) are mainly based on factorial estimates and extrapolated from non-PLW. High-quality quantitative data on iron requirements in PLW are lacking, particularly in Sub- Saharan Africa where anaemia and infections are common. The primary objective of this study is to use the stable iron isotope technique to determine iron requirements and assess iron absorption and losses in PLW living in Kenya. In this prospective observational study, we will enrol pregnant women in the first trimester (n = 250) from a previous study cohort (n=1000) who participated in an iron absorption study at least 12 months ago and received the stable iron (Fe) isotope 57Fe. This 57Fe has now distributed and equilibrated throughout the women's body iron. Once enrolled in the present study, following Kenyan guidelines, women will receive standard prenatal care, including routine daily iron and folate supplementation. We will collect venous blood samples in each trimester and at delivery, and during the first 6 months of lactation in the mothers and infants (heel prick samples). To directly assess dietary iron absorption, in a randomly selected subset of women (n=35), oral and intravenous stable iron isotope tracers (54Fe, 58Fe) will be administered in the 2nd and 3rd trimesters.
The serum or plasma ferritin concentration (referred to hereafter as ferritin) is the most widely used indicator to detect iron deficiency and a low ferritin indicates depleted iron stores. However, the threshold ferritin that defines iron deficiency remains unclear and diagnostic ferritin cutoffs from expert groups vary widely. Our study aim is to define the ferritin in Kenyan young women at which the body senses iron depletion and begins to upregulate iron absorption from the diet; this approach could provide a functionally defined threshold of iron deficiency in Sub-Saharan African women.
The co-primary objectives of this study are: 1) to investigate the effect adding a synbiotic (combination of a pre-and probiotic) to iron-fortified follow-up formula (FUF) on iron bioavailability, and 2) to investigate the effect adding Human Milk Oligosaccharides (HMOs) to iron-fortified FUF on iron bioavailability in 10-14 month-old Thai children.
The aim of this study is to measure the effect of a prebiotic (high dose/low dose) mixture at different doses within a wheat-based instant cereal, on fractional iron absorption (FIA), gut microbiota and inflammation after three weeks. FIA will be compared with and without three weeks of pre-feeding with two different doses of the prebiotic mixture.
The objective of this study was to compare the iron absorption from ferric pyrophosphate enriched Aspergillus oryzae (ASP-p) to commonly used ferric pyrophosphate (FePP) and ferrous sulfate (FeSO4) when fortified in chicken bouillon, using stable isotope methodology.
Dysmetabolic iron overload syndrome and genetic hemochromatosis are frequent causes of iron overload. Polyphenols are efficient iron-chelators. Investigator hypothesize that polyphenol supplementation can reduce iron absorption in iron overload disease. Iron absorption can be studied by the area-under-the-curve of serum iron after iron oral loading. The primary outcome is the decrease of post-prandial serum iron after rich-iron meal, due to polyphenol supplementation.
A total of 126 premenopausal women (42 lean, 42 obese with central obesity, 42 obese with peripheral obesity) will be recruited. Anthropometric measurements and body composition using DEXA will be collected. Overnight fasted subjects will be asked to give baseline blood samples before consuming a meal containing 6 mg 57Fe in the form of FeSO4. Subjects will return after 14 days and a blood sample will be collected for measurement of isotopic enrichment into red blood cells, serving as well as a baseline for the OGTT. Subjects will then be asked to ingest a solution of glucose (50g) containing 100 mg of iron in the form of sodium ferrous citrate (SFC), after which blood samples will be collected 2 hours post iron and glucose load. All three blood samples collected at baseline, 2 weeks post labeled iron load, and 2 hours post glucose/iron load will be analyzed for their levels of iron, glycaemia and inflammatory parameters.
Conventional indirect indicators of iron status, using serum and red blood cell biomarkers, are confounded by inflammation from common infections and are therefore of limited use in populations carrying a high burden of infection and inflammation, as for example women of reproductive age in malaria endemic areas in developing countries. Even without the confounding effect of inflammation, current markers of iron status are insensitive to small changes in dietary iron and do not allow to establish associations between dietary, lifestyle and genetic factors and iron balance. With a new method based on the dilution of a previously administered and equilibrated stable isotope signal, an accurate measurement of long-term oral iron balance and absorption is possible, allowing the estimation of iron requirements and potentially providing fundamental guidance for supplementation and fortification programs in both healthy and chronically inflamed/infected patients. In the current study the novel methodology will be validated in generally healthy subjects with low iron status. The technique will be used to assess dietary and lifestyle determinants of iron status and to compare the effect on iron balance and iron status of three distinct, commonly used iron interventions: food fortification with iron; oral iron supplementation, and intravenous iron infusion.