The Influence of Dietary Fibre on Mineral Absorption and Utilisation

Rossander, L; Sandberg, Ann-Sofi; Sandström, Brittmarie

doi:10.1007/978-1-4471-1928-9_11

Cited by 24 publications

(10 citation statements)

References 87 publications

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“…Some gelling agents, such as alginate and carrageenan, form a complex with calcium (24). Dietary fibre or phytate in the diet can also have a negative effect on calcium bioavailability (25,26). Further research is necessary to clarify this.…”

Section: Discussionmentioning

confidence: 99%

Description of a Dynamic In Vitro Model of the Dog Gastrointestinal Tract and an Evaluation of Various Transit Times for Protein and Calcium

et al. 1999

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In order to manufacture complete and balanced dog diets, it is important to know the nutrient requirements of dogs and the availability of these nutrients from food. As pet food manufacturers are restricted in their options for (invasive) animal studies, due to ethical constraints, it is important to have alternative methods for researching the effects of various dog diets. To simulate the gastrointestinal tract of the dog, the dynamic gastrointestinal tract model developed by Minekus et al. was further developed and modified in this study. The model consists of four compartments which simulate the stomach and small intestine (duodenum, jejunum and ileum). Each compartment is made of glass, with a flexible inner wall. This wall can be compressed by increasing the pressure of the surrounding water, mimicking the peristaltic movements and mixing seen in vivo. The model is computer-controlled to simulate physiological parameters such as pH, transit time and secretion of digestive juices, as derived from the literature. Gastric meal delivery and the effects of intestinal transit time on protein digestibility and availability for absorption of calcium from dog food were studied to evaluate the model. The gastric meal delivery of dry dog food was identical to a preset curve, which was based on in vivo data from healthy dogs. The emptying time for canned dog food was somewhat slower than the preset values, probably due to the viscosity of the meal. The differences between the preset values and the measured delivery were not significant. The digestibility of protein and the availability of calcium for absorption increased with a longer transit time. A significant difference was found between medium and slow transit times for the nitrogen content in the ileal delivery effluent and the jejunal dialysates (p < 0.05). The same trend was seen for calcium (not significant). The overall conclusion is that the model is a useful tool for mimicking the gastrointestinal tract of dogs. Parameters such as pH, transit time and enzyme activity can be mimicked and can be kept within a physiological range.

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Section: Discussionmentioning

confidence: 99%

Description of a Dynamic In Vitro Model of the Dog Gastrointestinal Tract and an Evaluation of Various Transit Times for Protein and Calcium

et al. 1999

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“…The effect of dietary fiber on nutrient bioavailability is linked to some of its physical properties in the gastrointestinal tract, such as cation exchange capacity, bile acid binding, water-holding capacity, viscosity, and its ability to act as a substrate for fermentative microorganisms [58]. In general, dietary fiber alone does not have a major effect on the absorption of minerals (e.g., calcium or magnesium) [59] or trace elements [26,60], assessed in vivo using isotope techniques, although α-cellulose may affect the utilization or endogenous losses of copper [61]. Note that these findings are in contrast to earlier in vivo results in which pure fiber fractions were not used [62].…”

Section: Noncompetitive Interactionsmentioning

confidence: 99%

The Role of Diet- and Host-Related Factors in Nutrient Bioavailability and Thus in Nutrient-Based Dietary Requirement Estimates

Gibson¹

2007

Food Nutr Bull

152

123

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“…In contrast to macronutrients, biochemical conversion during digestion of micronutrients into absorbable units is not needed, since they 6 matrix during digestion might be limited, thereby reducing the amount available for absorption (Platel and Srinivasan 2016). Among others, the low bioaccessibility and bioavailability of non-heme iron and zinc from plant-based foods can be attributed to several inherent barriers for mineral digestion, of which antinutrients and physical barriers seem to be the most important (Rossander, Sandberg and Sandström 1992;Shahidi 1997;Mishra, Hardcare and Monro 2010;Platel and Srinivasan 2016). On the one hand, mineral antinutrients (e.g.…”

Section: Introductionmentioning

confidence: 99%

Barriers impairing mineral bioaccessibility and bioavailability in plant-based foods and the perspectives for food processing

Rousseau

Kyomugasho

Celus

et al. 2019

Critical Reviews in Food Science and Nutrition

144

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Plant-based foods gain more importance since they play a key role in sustainable, low-meat and healthy diets. In developing countries, these food products, especially legumes and cereals, are important staple foods. Nevertheless, the question arises on how efficient they are to deliver minerals and if it is useful to encourage their consumption to reduce the prevalence of mineral deficiencies? This review paper focuses on the discrepancy between the mineral content and the amount of minerals that can be released and absorbed from plant-based foods during human digestion which can be attributed to several inherent factors such as the presence of mineral antinutrients (phytic acid, polyphenols and dietary fiber) and physical barriers (surrounding macronutrients and cell wall). Further, this review paper summarizes the effects of different processing techniques (milling, soaking, dehulling, fermentation, germination and thermal processing) on mineral bioaccessibility and bioavailability of plant-based foods. The positive impact of these techniques mostly relies on the fact that antinutrients levels are reduced due to removal of fractions rich in antinutrients and/or due to their leaching into the processing liquid.Although processing can have a positive effect, it also can induce leaching out of minerals and a reduced mineral bioaccessibility and bioavailability.

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The Influence of Dietary Fibre on Mineral Absorption and Utilisation

Cited by 24 publications

References 87 publications

Description of a Dynamic In Vitro Model of the Dog Gastrointestinal Tract and an Evaluation of Various Transit Times for Protein and Calcium

Description of a Dynamic In Vitro Model of the Dog Gastrointestinal Tract and an Evaluation of Various Transit Times for Protein and Calcium

The Role of Diet- and Host-Related Factors in Nutrient Bioavailability and Thus in Nutrient-Based Dietary Requirement Estimates

Barriers impairing mineral bioaccessibility and bioavailability in plant-based foods and the perspectives for food processing

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