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Mineral absorption
About: Mineral absorption is a research topic. Over the lifetime, 346 publications have been published within this topic receiving 11296 citations.
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TL;DR: The results support the current U.S. recommended intakes for 1–4-y-old children for Mg and Fe, but suggest that those for Ca and Zn are too low.
Abstract: Mineral requirements in young children are poorly understood, and current recom- mendations rely heavily on data collected in older children or adults. Our objectives were to assess the relationship between mineral (Ca, Mg, Fe, Zn, and Cu) intake in young U.S. chil- dren, and mineral absorption, excretion, and retention; and to use these data to re-examine the most recent recommended intakes. Thirty children, 1-4 y old, were studied on their usual diet. After 7 d of home adaptation they were admitted for either a 2-d or 5-d metabolic study where multiple stable isotope or Ca, Mg, Fe, Zn, and Cu were administered and mineral ab- sorption (2-d study), or absorption and excretion (5-d study) were assessed. Fractional (%) absorption of some (Ca, Mg) but not all (Fe, Zn) minerals decreased as intake increased. Absolute (total) absorption and net retention of all the minerals increased as their intake in- creased. Mineral homeostasis was related to changes in fractional absorption (Ca and Mg), fecal excretion (Zn), or whole body mineral status (Fe). Our results support the current U.S. recommended intakes for 1-4-y-old children for Mg and Fe, but suggest that those for Ca and Zn are too low.
TL;DR: A low dietary supplementation of OLE has no effect on the digestibility and retention of major nutrients, although some minor negative effects on mineral digestibility can be present.
Abstract: It is widely accepted that olive (Olea europaea L.) polyphenols (OP) have many favourable properties (e.g. antioxidative, antimicrobial, antifungal). OP can improve the growth and nutrient digestibility of animals via affecting digestion and health, even though they could negatively affect the mineral absorption by forming insoluble complexes with minerals in the intestine. In the present study, the effects of a dietary olive leaves extract (OLE) on nutrient digestibility in pigs were studied. Twenty-four weaned castrated male piglets were fed a no supplemented (C) or a supplemented diet with three different levels of OLE (O1, O2 and O3: 3.84 mg, 38.4 mg, 96 mg hydroxytyrosol equivalents/day, respectively). Retention and apparent total tract digestibility (ATTD) of dry matter (DM), crude protein (CP), crude fat (CF), organic matter (OM), nitrogen free extract (NFE), ash, neutral (NDF) and acid detergent fibres (ADF), gross energy (GE), Ca, P, Mg, Fe, Cu, Zn, K and Na were measured. Results showed that OLE lowered the retention of Fe and K, and revealed a numerical tendency to lower the retention of Cu and ATTD of Fe and Cu. In conclusion, a low dietary supplementation of OLE has no effect on the digestibility and retention of major nutrients, although some minor negative effects on mineral digestibility can be present.
TL;DR: BaBu et al. as mentioned in this paper evaluated the digestibility of essential cation minerals, viz., Ca2+, Mg2+, Cu2+, Zn2+, Fe2+ and Mn2+ when electrovalency of mineral supplement was positive or negative and concluded that cation mineral digestibility was better when net electrical charge of mineral mixture was negative.
Abstract: August 2014 | Volume 2 | Issue 8 | Page 433 Abstract | Study was undertaken to assess the digestibility of essential cation minerals viz., Ca2+, Mg2+, Cu2+, Zn2+, Fe2+ and, Mn2+ when electrovalency of mineral supplement was positive or negative. Lactating Deoni cows were divided into 4 groups of 4 each in completely randomized block design and fed 8 KG fresh para grass, ad lib ragi straw and concentrate supplement without mineral mixture (control) or fortified with essential cation (T1) or anion (T2) minerals or both together (T3). The net electrical charge in the mineral mixtures in T1, T2 and T3 were +0.87, –1.55 and –0.64, respectively. DM (p = 0.96), OM (p = 0.96), CP (p = 0.99), Fe2+ (p = 0.98) and Mn2+ (p = 0.83) intakes were not significantly different between CG and TGs. Net charge in T2 affected CP digestibility adversely (p< 0.05). Ca2+ digestibility was apparently (p = 0.29) higher in T2 and T3. Lack of Phosphorus (P–) source in T1 affected the Ca2+ utilization in comparison to T2 and T3. Mg2+ digestibility was higher (P< 0.05) in T2 and T3 than CG and T1. Cu2+ digestibility was not significantly (p= 0.77) different between groups. Zn2+ (p < 0.01), Fe2+ (p < 0.01) and Mn2+ (p < 0.01) digestibility was significantly different between CG and TGs and appeared that the net electrical charge of mineral mixture influenced the digestibility of opposite ions. Study concluded that cation mineral digestibility was better when net electrical charge of mineral mixture was negative. Kiran BaBu S., Bandla SrinivaS*
01 Jan 2023
TL;DR: The influence of phytate on mineral bioavailability depends on its concentration, pH, and PHytate:mineral molar ratio, temperature, presence of other compounds, and mineral ionic strength as mentioned in this paper .
Abstract: Cereals are good sources of minerals needed for normal growth, development, and function. However, cereals are also rich in phytate (1.09–21.6 mg/g dry basis) which is a prominent antinutritional factor. Phytates reduce mineral bioavailability by forming insoluble phytate-mineral complexes that are unavailable for absorption by monogastric animals and humans. The influence of phytate on mineral bioavailability depends on its concentration, pH, and phytate:mineral molar ratio, temperature, presence of other compounds, and mineral ionic strength. Cereal phytases have the potential to hydrolyze phytate, releasing the bound minerals. Notably, the distribution, content, and interaction of phytates, minerals, and phytases vary considerably in different cereal species. Depending on the type of cereal and mineral and phytate localization, different processing techniques (soaking, fermentation, germination, thermal processing, and milling) can increase or decrease the mineral cereal contents. Conventional, modern breeding and genetic engineering can increase mineral bioavailability and/or decrease phytate content in cereal grains.
TL;DR: DietaryMannitol increased the absorption of Ca and Mg and the caecum markedly contributed to this promoting effect of mannitol.
Abstract: The effect of mannitol on bone-related mineral absorption and retention and the mechanism was investigated in this study. Fourteen 8-week-old male Wistar rats in experiment 1 and same number and age cecectomized Wistar male rats in experiment 2 were divided into two subgroups of seven animals, respectively, fed diets containing 0 or 4% mannitol for 28 days. Mineral balance tests were determined twice during days 8-12 and days 22-26, and the rats were slaughtered on day 28 both in experiment 1 and experiment 2. The whole caecum and colon were collected with the content to analyse tissue weight, content weight, content's pH and moisture, organic acids' concentration and mineral levels. In experiment 1, Ca absorption and retention and Mg absorption were significantly increased by mannitol feeding during days 8-12. Caecal total weight, tissue weight and content weight were increased, the pH of caecum and colon was reduced, and the concentrations of caecal short-chain fatty acids (SCFAs) were modified by mannitol feeding. In experiment 2, during days 8-12 and days 22-26, Ca absorption and retention were significantly lowered by mannitol feeding in cecectomized rats; however, mannitol feeding decreased Mg absorption during days 8-12, but did not impact Mg retention. Colonic total weight, tissue weight and content weight were significantly increased, and colonic pH was reduced by mannitol feeding. In conclusion, dietary mannitol increased the absorption of Ca and Mg and the caecum markedly contributed to this promoting effect of mannitol.