In vitro determination of zinc dialyzability from duplicate hospital meals: influence of other nutrients

Velasco-Reynold, Carlos; Navarro-Alarcón, Miguel; Serrana, H. Lopez-G De La; Pérez-Valero, Vidal; López-Martínez, María C.

doi:10.1016/j.nut.2007.10.002

Cited by 17 publications

(12 citation statements)

References 34 publications

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“…This finding is contrary to that found by us in duplicate meals where iron dialyzability enhanced concomitantly with dialyzable zinc fractions and zinc dialyzability. In the analyzed duplicate meals, the mean total zinc levels [2.18±1.80 mg/meal, which corresponded to a mean zinc DDI of 6.51 mg/day; (26)] are low in relation to the mean total iron levels (5.90± 4.97 mg/meal; mean iron DDI of 17.7±6.91 mg/day; Table 1) (for a 1 mg zinc/2.71 mg iron ratio). Therefore, at this mineral ratio, the positive effect of dialyzable zinc levels and zinc dialyzability on iron dialyzability could be explained.…”

Section: Resultsmentioning

confidence: 98%

“…The pepsin solution, pancreatin-bile extract mixture, and 0.5 M NaOH and 6 M HCl dissolutions, employed to adjust the pH, were prepared as previously reported elsewhere (26).…”

Section: Reagentsmentioning

confidence: 99%

“…Dialysis membrane spectra with molecular mass cutoff (MMCO) of 12-14 kDa (Visking size 3-20/32, Medicell International, London, UK) was used (26).…”

Section: Reagentsmentioning

confidence: 99%

“…The detailed description of the composition and previous treatment to the iron analysis of the analyzed duplicate meals consumed daily was reported elsewhere (26). After the acid digestion of duplicate meals (26), the analytical solution obtained was proved to be optimal for the iron determination by FAAS.…”

Section: Duplicate Portion Sampling Of Meals and Total Iron Analysis mentioning

confidence: 99%

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Iron Dialyzability from Hospital Duplicate Meals: Daily Intake

Velasco-Reynold

Navarro-Alarcón

Serrana

et al. 2009

Biol Trace Elem Res

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Both total and dialyzable iron levels and corresponding dialyzability were determined in 108 duplicate meals during 36 consecutive days. Total mean iron fraction of 5.90 +/- 4.97 mg was found in the meals. The iron supplied by the meals is directly and significantly (p < 0.05) correlated with macromicronutrient content (carbohydrates, fiber, and protein). The mean iron dialyzability (4.81 +/- 3.25%) was low and not significantly different among the three primary meals (breakfast, lunch, and dinner). Significant interactions of several minerals on iron levels were found (p < 0.05). Iron dialyzability was only statistically influenced by zinc dialyzability in meals (p < 0.05). The dialyzed iron fraction present in meals was significantly correlated with protein and ascorbic acid levels (p < 0.01). The mean iron daily dietary intake was 17.7 +/- 6.91 mg. The hospital meals provided enough iron. Foods of animal origin are primary sources of iron in diet.

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Section: Resultsmentioning

confidence: 98%

“…The pepsin solution, pancreatin-bile extract mixture, and 0.5 M NaOH and 6 M HCl dissolutions, employed to adjust the pH, were prepared as previously reported elsewhere (26).…”

Section: Reagentsmentioning

confidence: 99%

“…Dialysis membrane spectra with molecular mass cutoff (MMCO) of 12-14 kDa (Visking size 3-20/32, Medicell International, London, UK) was used (26).…”

Section: Reagentsmentioning

confidence: 99%

Section: Duplicate Portion Sampling Of Meals and Total Iron Analysis mentioning

confidence: 99%

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Iron Dialyzability from Hospital Duplicate Meals: Daily Intake

Velasco-Reynold

Navarro-Alarcón

Serrana

et al. 2009

Biol Trace Elem Res

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“…On the other hand, other researchers reported that the Mg dialysabilities decreased slightly with increasing phytic acid contents [5,33]. Dialysable Mg 0.378 ** Potassium 0.374 *** Ca dialysability 0.331 *** Dialysable Zn b 0.296 *** Ascorbic acid 0.380 *** Cr dialysability c 0.463 * * p≤0.001; ** p<0.01; *** p<0.05 a Total and dialysable Cu determined in duplicate meals by GFAAS [30] b Total and dialysable Zn determined in duplicate meals by GFAAS [40] c Total and dialysable Cr determined in duplicate meals by GFAAS [31] d Total and dialysable Fe determined in duplicate meals by FAAS [41] Vitamin A and K contents of meals estimated by the food consumption tables compiled in the statistics programme Dietsource 2.0 also enhanced significantly with the Mg dialysability levels found (Table 4). …”

Section: Total and Dialysable Mg Fractions And Corresponding Element mentioning

confidence: 99%

Dialysability of Magnesium and Calcium from Hospital Duplicate Meals: Influence Exerted by Other Elements

Velasco-Reynold

Navarro-Alarcón

Serrana

et al. 2009

Biol Trace Elem Res

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Total and dialysable magnesium and calcium levels and corresponding dialysabilities were measured in duplicate meals (n = 108) during 36 consecutive days. The interaction exerted by other nutrients and energy on them was also performed. Total mean magnesium and calcium fractions of 113.9 +/- 98.3 and 337.2 +/- 278.9 mg/meal respectively, were found. The Mg and Ca levels supplied by meals are positively (p < 0.05) correlated with macronutrient contents (carbohydrates and proteins). The mean dialysable Mg and Ca fractions were 56.9 +/- 36.3 and 127.4 +/- 112.3 mg/meal (50.4 +/- 13.2 and 37.8 +/- 10.7% as dialysabilities, respectively). Total Mg and Ca levels are significantly correlated with corresponding element dialysabilities (p < 0.05). For both minerals, significant correlations between their total and dialysable fractions and between their dialysable level and dialysabilities were noted (p < 0.01). The mean Mg and Ca daily dietary intakes (DDI) were 341.7 +/- 68.0 and 1,011.6 +/- 424.4 mg/day, respectively. For Ca and Mg the existence of similarities in their behaviour in meals and absorptive processes has been found. Duplicate meals with raw vegetables are good sources of bioaccessible Mg. High Ca dialysability has been found in the analysed meals. The fish and products constitute a good source of bioaccessible Ca. Mg, Ca, zinc, and chromium levels enhanced significantly the Mg dialysability. The Ca dialysability rose significantly with dialysable Ca and chromium fractions (p < 0.05).

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