Availability of Soybean Hull Iron Fed to Humans in a Mixed, Western Meal

Lykken, Glenn I.; Hunt, John; Nielsen, Emily J; DlNlZlS, F.R.

doi:10.1111/j.1365-2621.1987.tb05876.x

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…Seed coats are removed from soybean seeds during oil extraction and are used mainly in animal feeds (Blasi et al, 2000). However, soybean seed coats added to bakery goods provide an excellent source of Fe for human nutrition (Lykken et al, 1987). Seed-coat Fe in soybean is present as Fe 3+ (Ambe, 1994).…”

Section: Discussionmentioning

confidence: 99%

Seed Iron in Diverse Soybean Genotypes

Moraghan

Helms

2005

Journal of Plant Nutrition

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Iron (Fe) in the embryo fraction of soybean (Glycine max L.) seed is important for seedling growth. Seed Fe accumulation in 27 soybean genotypes differing in seed size was studied at two field locations. Mean seed weight was 148 mg seed −1 with mean individual genotypic values ranging from 68 to 217 mg seed −1 . Percentage of total seed dry matter in the seed-coat fraction, which was inversely correlated with individual seed weight, was 8.2%, with mean individual genotypic values ranging from 7.0% to 12.4%. Mean seed-Fe concentration [Fe] was 65 µg Fe g −1 , with individual genotypic values ranging from 48 to 81 µg Fe g −1 . Seed Fe relative to dry-matter distribution was much more concentrated in seed coats than in embryos of all genotypes. Mean percentage of total seed Fe located in the seed-coat fraction was 29%, with mean genotypic values ranging from 23% to 38%. Neither seed-Fe characteristic was correlated with individual seed weight. Seed [Fe] was not correlated with seed-manganese (Mn) concentration [Mn]. Mean seed [Fe] for the 27 genotypes was different at the two locations, presumably due to differences in available soil Fe. Both genotype and environment affected seed [Fe] of soybean. Soybean seed coats, a major by-product after oil extraction, are a possible rich source of Fe for human nutrition.

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Section: Discussionmentioning

confidence: 99%

Seed Iron in Diverse Soybean Genotypes

Moraghan

Helms

2005

Journal of Plant Nutrition

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“…In addition, the nature of soybean protein contributes to a decrease in bioavailability of trace elements, particularly iron, in humans (Thompson, 1988). The method of preparation, however, modulated this effect (Lykken et al, 1987): acid precipitation during preparation of the isolate inhibits this action (Thompson and Erdman, 1988) and leads to improved iron absorption. This was seen in group SP animals.…”

Section: Animalsmentioning

confidence: 99%

Tofu Consumption: Effects on Plasma Lipids in Rats

Roussel

Ravel

Faure

et al. 1992

Journal of Food Science

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SamplesOur objective was to determine the effect of a diet rich in tofu (soybean curd) on the main blood components of rats. This was done in comparison to diets with casein, soybean proteins or soybean oil, enabling the observed biological effect to be related to the composition of the tofu. Animals on the tofu diet had very low cholesterol levels and an acceptable HDL cholesterol / total cholesterol ratio. Growth and amino acid profile were also adequate, but the bioavailability of trace elements decreased.At the end of the experiment, blood was drawn from animals fasted overnight, by intracardiac puncture after anesthesia (intraperitoneal injection of nembutal, 50 mg/kg). Two types of samples were required. The first was placed in a dry tube for determination of blood glucose, the lipid components, the electrolyte balance, amino acids and iron. The second was over zinc-free heparin (Prolabo) for assays of trace elements (zinc and copper). In order to prevent chronobiological changes, samples were drawn at the same time in the morning.

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“…Soybean seed coats were identified in the early 1980s as being a rich source of dietary iron (Levine, Weaver, & Kirleis, 1982;Weaver, Nelson, & Elliott, 1984). While the iron in hulls is readily assimilated by humans, soybean meal has very poor iron bioavailability (Welch & Van Campen, 1975;Jacob, Sandstead, Klevay, & Johnson, 1980;Lynch, Beard, Dassenko, & Cook, 1984;Johnson, Berry, & Weaver, 1985;Lykken, Mahalko, Nielsen, & Dintzis, 1987;Beard et al, 1988). Martino et al (2011) studied the chemical composition and iron bioavailability to rats of soybean flour with and without hulls made from a new cultivar of soybean.…”

Section: Ironmentioning

confidence: 99%

Soybean Seed Coats: A Source of Ingredients for Potential Human Health Benefits-A Review of the Literature

O’Bryan¹,

Kushwaha²,

Babu³

et al. 2014

JFR

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<p>Soybean seed coats are an underutilized byproduct from the commercial crushing of soybeans to make soymeal and soy oil. These seed coats constitute 7 to 10% of the weight of a bushel of soybeans so they provide a substantial opportunity to add value to each bushel. Overall, the United States produces approximately 6 million metric tons of seed coats each year. Biologically active compounds contained in soybean seed coats have been shown to prevent and or reduce macular degeneration, obesity, cancer, and many other debilitating diseases. For example the seed coats of YJ-100 black soybeans contain more than 20 mg/g of anthocyanins, the highest concentration of anthocyanins of all plants materials including other row crops. The purpose of this paper is to examine the chemical content of soybean seed coats, highlight opportunities to add value and discuss the potential health benefits of these chemicals.</p>

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Availability of Soybean Hull Iron Fed to Humans in a Mixed, Western Meal

Cited by 14 publications

References 12 publications

Seed Iron in Diverse Soybean Genotypes

Seed Iron in Diverse Soybean Genotypes

Tofu Consumption: Effects on Plasma Lipids in Rats

Soybean Seed Coats: A Source of Ingredients for Potential Human Health Benefits-A Review of the Literature

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