Evaluation of iron bioavailability in a mixture of cereals, seeds, and grains ("Human Ration")

Food Science and Technology (Campinas)

Bárbara Nery Enes²  Natália Elizabeth Galdino Alves²  Samanta Thomas Valdés¹  Carlos Mário Martins Silveira²  Neuza Maria Brunoro Costa¹  Sônia Machado Rocha Ribeiro²  Shaila Turbay Pires¹  Hércia Stampini Duarte Martino² 

[1] ,Universidade Federal de Viçosa Departamento de Nutrição e Saúde Viçosa MG ,Brasil

关键词: dietary fiber;    minerals;    bioavailability;    short chain fatty acids;    condensed tannin;   

DOI  :  10.1590/S0101-20612014005000002

来源: SciELO

【 摘 要 】

Iron bioavailability was evaluated in three mixtures of cereals, seeds, and grains ("Human Ration"): light, regular, and homemade provided to rats. The animals received an iron depletion diet for 21 days, followed by a repletion diet containing 12 mg·kg-1 of iron for 14 days. The hemoglobin regeneration efficiency and the relative biological value did not differ between the light mixture and control group. The iron bioavailability of the light mixture of cereals, seeds, and grains and the control group were 99.99±27.62 and 80.02±36.63, respectively, while the regular and homemade mixtures of cereals, seeds, and grains showed lower iron bioavailability, 50.12±35.53 and 66.66±15.44, respectively; the iron content of the diet with light cereal mixture light was statistically similar to that of the control (ferrous sulfate 99.99±27.62). The high content of tannin (202.81±19.53 mg·100-1) in the diet with the regular cereal mixture may have contributed to its low iron bioavailability. The higher intake of soluble fiber by the animals fed the light mixture (21.15±0.92 g) was moderately correlated (r=0.5712, p=0.0018) with the concentration of propionate in the caecal bulk (65.49±11.08 µmol/g). The short chain fatty acids produced by soluble fiber fermentation, associated with the low-content of tannin may have improved iron solubility and absorption in the light cereal mixture diet. The iron bioavailability in the light mixture of cereals, seeds, and grains was similar to that of ferrous sulfate.

【 授权许可】

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