International Journal for Vitamin and Nutrition Research (INT J VITAM NUTR RES )

Publisher: Hogrefe


Since 1930 this journal has provided an important international forum for scientific advances in the study of nutrition and vitamins. Widely read by academicians as well as scientists working in major governmental and corporate laboratories throughout the world, this publication presents work dealing with basic as well as applied topics. The editorial and advisory boards include many of the leading persons currently working in this area. The journal is of particular interest to: Nutritionists, Vitaminologists, Biochemists, Physicians, Engineers of human and animal nutrition.

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    International journal for vitamin and nutrition research, Internationale Zeitschrift für Vitamin- und Ernährungsforschung, Journal international de vitaminologie et de nutrition
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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Background: The Indian plant root Salacia reticulata, which is rich in alpha-glucosidase inhibitors, is used for metabolic disorders in Ayurvedic medicine. Vitamin D3 is also used in the treatment of some metabolic diseases. Our goal was to determine its potential effect for humans with obesity. Material: In a randomized open-label study, we investigated 40 healthy participants aged 30 - 60 years, physically active, with a body mass index (BMI) of 25 - 45. The participants were randomly allocated into two groups. Body weight, BMI, and body composition were measured. Both groups (A and B) received a guideline for lifestyle and fitness training for 4 weeks. Group B additionally took one capsule containing 200 mg of Salacia reticulata and 1.6 µg (i. e. 64 IU) Vitamin D3 (SRD) 3 times/day with the meals. Results: Significant weight and body-fat reduction within 4 weeks was observed. Group A lost 1.8 kg or 2.1 %, group B lost 5.3 kg or 6.1 % (p = 0.03), therefore BMI reduction was achieved. While Group A lost 1.4 % of body fat, group B reduced it by 4.5 % (p = 0.01). Conclusion: These promising results suggest that the combination of Salacia reticulata and Vitamin D3 might be highly valuable and potent to treat overweight and obesity, especially in addition to a modifying lifestyle program. Further research is needed in addition to this study to clarify pathways and effect mechanisms.
    International Journal for Vitamin and Nutrition Research 10/2013; 83(4):216-23.
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    ABSTRACT: Background: Diet is a major exogenous source of vitamin D. The objective of this analysis was to determine whether the yes/no answer to a simple question exploring diet (“Do you eat fatty fish at least once a week and/or eggs several times per week?”) could be associated with serum 25-hydroxy-vitamin D status among 261 older in- and outpatients (mean ± standard deviation, 83.5 ± 8.1 years). Methods: Two groups were distinguished based on the binary yes/no answer. Hypovitaminosis D was defined as serum 25-hydroxyvitamin D ≤ 75 nmol/L. Results: More participants with hypovitaminosis D answered “No” to the question on diet compared to their counterparts (p = 0.002). Answering “No” was associated with hypovitaminosis D (OR = 3.22, p = 0.001) after adjustment for potential confounders, with a positive predictive value = 79 %. Conclusion: A simple dietary question may identify older patients with hypovitaminosis D who should receive vitamin D supplements.
    International Journal for Vitamin and Nutrition Research 08/2013; 83(4):254-8.
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    ABSTRACT: In this study the effect of increasing dietary alpha tocopherol on vitamin E tissue concentrations, lipid peroxidation (malondialdehyde), antioxidant enzymes, and fatty acid composition has been investigated in farmed Atlantic salmon. To this end fish (initial body weight ~ 193 g, n = 70 per group) were fed diets based on fish oil (27.5 %), fish meal (15.0 %), wheat gluten (20.6 %), and soy protein concentrate (24.0 %) for 14 weeks. Diets were supplemented with 0 (negative control), 150, and 400 mg/kg vitamin E as all-rac alpha-tocopheryl acetate. Dietary vitamin E did not affect feed conversion efficiency ratio but significantly (p < 0.05) increased alpha-tocopherol concentrations in salmon plasma, liver, and fillet (n = 8 per group each). The increase in fillet alpha-tocopherol was accompanied by a considerable decrease (p < 0.01) in malondialdehyde concentrations at the higher supplementation level. Furthermore, we observed an antagonistic interaction between alpha- and gamma-tocopherol in plasma at the highest supplementation level, since high dietary alpha-tocopherol reduced plasma gamma-tocopherol concentrations. Liver antioxidant enzymes, including glutathione peroxidase and superoxide dismutase, remained largely unchanged in response to dietary alpha-tocopherol. Dietary alpha-tocopherol did not affect eicosapentaenoic acid and docosahexaenoic acid concentrations in salmon fillet. Present data suggest that alpha-tocopherol supplementations beyond dietary recommendations may further improve flesh quality and nutritional value of Atlantic salmon fillet as far as malondialdehyde and vitamin E concentrations are concerned.
    International Journal for Vitamin and Nutrition Research 08/2013; 83(4):238-45.
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    ABSTRACT: Calcium concentration in hair, representing intracellular calcium levels, is associated with systemic diseases such as coronary artery disease. To date, there are no previous studies which investigate the regulation of hair calcium levels. The aim of the study is to investigate whether hair calcium concentration is related to calcium intake and calcium content in bone - bone mineral density (BMD). An observational research study was conducted with 55 women over the age of 20 who visited a university hospital in Suwon, Korea. The average age of the women was 51.45. Depending on the concentration of hair calcium, participants were divided into quartiles to compare calcium intake and BMD. There was no difference in demographic, anthropometric, and biochemical characteristics between the highest quartile of hair calcium concentration and the rest of the quartiles. However, the highest quartile ingested significantly less calcium compared to the rest of the quartiles (p < 0.05). The highest quartile of hair calcium concentration also showed significantly lower BMD and T-score in the L1 - 4 vertebrae compared to the rest of the quartiles (p < 0.05). These results show that high hair calcium concentration was associated with low calcium intake and low BMD.
    International Journal for Vitamin and Nutrition Research 06/2013; 83(3):154-61.
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    ABSTRACT: Dual-label stable isotope dilution assays for the simultaneous quantification of isotopologic folates in clinical samples offer the perspective for differentiating between unlabeled folates from endogenous body pools and administered [13C5]-labeled folates from a test dose when performing bioavailability trials. In contrast to intact folates, this methodology could hitherto not be applied to the quantification of the folate catabolites, p-aminobenzoyl glutamate and p-acetamidobenzoyl glutamate. In this study, [2H4]-p-aminobenzoyl glutamate, [2H4]-p-acetamidobenzoyl glutamate, and unlabeled p-acetamidobenzoyl glutamate were synthesized. The synthesis of the [2H4]-labeled compounds started at unlabeled p-aminobenzoic acid. For the formation of p-acetamidobenzoyl glutamate, p-aminobenzoyl glutamate was acetylated. The new substances were applied successfully in stable isotope dilution assays for the simultaneous quantification of the [13C5]-labeled and unlabeled folate catabolites, p-aminobenzoyl glutamate and p-acetamidobenzoyl glutamate, along with the predominant folate vitamers in urine. The assays were based on clean-up by strong anion exchange followed by liquid chromatography-tandem mass spectrometry detection. Assay sensitivity was sufficient to detect the folate catabolites in physiologic concentrations. The limit of detection was below 0.4 and 0.3 nmol/100 g for p-aminobenzoyl glutamate isotopologues and p-acetamidobenzoyl glutamate isotopologues in urine, respectively. The successful synthesis of [2H4]-p-aminobenzoyl glutamate, [2H4]-p-acetamidobenzoyl glutamate, and unlabeled p-acetamidobenzoyl glutamate and the implementation of these substances in stable isotope dilution assays allows dual-label designs that provide a more detailed insight into human folate metabolism.
    International Journal for Vitamin and Nutrition Research 04/2013; 83(2):112-21.
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    ABSTRACT: For decades, vitamin D has been known to be essential in the development, function, and maintenance of healthy bones through the regulation of calcium homeostasis throughout life. Sufficient vitamin D prevents the occurrence of rickets in children and osteomalacia in adults. The adequate nutritional intake of vitamin D and calcium are the basis for the prevention and management of osteoporosis, a disease producing brittle bones that are prone to fractures. Vitamin D has been implicated in the regulation of neuromuscular function and in reducing the risk of falls, a major cause of bone fractures. Thus vitamin D may be a central component of musculoskeletal health through its beneficial effects on muscle function and bone stability. The action of vitamin D by the active metabolite 1,25-dihydroxyvitamin D [1,25(OH)2D], however, is not limited to its endocrine function in bone metabolism. The active metabolite behaves as a hormone and binds to the vitamin D receptor (VDR) present in nearly all tissues of the human body. In addition, the 1-alpha-hydroxylase enzyme is present not only in the kidney but also in many other organs. Both vitamin and enzyme exert their biological effects via paracrine/autocrine actions related to cardiovascular disease, diabetes, cancer, and the immune system. Thus vitamin D may show favorable effects in many organs and play a significant role in the maintenance of general health.
    International Journal for Vitamin and Nutrition Research 04/2013; 83(2):92-100.
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    ABSTRACT: Insulin resistance is a fundamental feature of metabolic disorders such as metabolic syndrome. The formation of advanced glycation end-products (AGEs) is increased in patients with hyperglycemia, which results in the loss of protein function. Therefore, considerable attention has been paid to the pathological significance of AGEs in diseases associated with insulin resistance. We previously demonstrated that all-trans-retinoic acid (ATRA) ameliorated insulin resistance in mice that were fed a high-fat, high-fructose (HFHFr) diet. However, it is unclear whether the HFHFr diet increases the production of AGEs in the liver, and whether ATRA affects this production. In the present study, we investigated the production of glyceraldehyde-derived AGEs (Glycer-AGEs) in the liver of HFHFr diet-induced insulin-resistant mice using an antibody against Glycer-AGEs. We noted a remarkable formation of Glycer-AGEs with estimated molecular weights of approximately 265, 282, and 312 kDa in the liver of the insulin-resistant mice; however, the production of Glycer-AGEs was limited in the control. In accordance with previous observations, these Glycer-AGEs in mice disappeared after treatment with ATRA. These results suggest that hepatic Glycer-AGEs can be useful markers for the diagnosis and therapeutic evaluation of insulin resistance and may play a pathological role in the development of insulin resistance.
    International Journal for Vitamin and Nutrition Research 04/2013; 83(2):137-41.
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    ABSTRACT: This study was designed to investigate the effects of combined administration of lipoic acid and pyridoxine on albuminuria, oxidative stress, blood pressure, serum advanced glycation end-products, nitric oxide (NO), and endothelin-1 in patients with diabetic nephropathy. Thirty-four patients were randomly assigned to either a supplement group or a placebo group. The patients in the supplement group received 800 mg lipoic acid and 80 mg pyridoxine daily for 12 weeks, whereas the placebo group received corresponding placebos. Urinary albumin, serum malondialdehyde (MDA), and systolic blood pressure decreased significantly in the supplement group compared to the placebo group (p < 0.05). Serum NO increased in the supplement group compared to the placebo group (p < 0.05). Serum pentosidine and carboxymethyl lysine decreased significantly in the supplement group at the end of week 12 compared to baseline (p < 0.05). No statistically significant differences were observed between the two groups in mean changes of serum endothelin-1, glucose, and diastolic blood pressure. The present study indicates that combined administration of lipoic acid and pyridoxine improves albuminuria in patients with diabetic nephropathy by reducing oxidative stress, advanced glycation end-products, and systolic blood pressure. The reduction in microalbuminuria may be of benefit in retarding the progression of diabetic nephropathy.
    International Journal for Vitamin and Nutrition Research 04/2013; 83(2):77-85.
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    ABSTRACT: Purpose: This study aimed to investigate the neuroprotective effects of vitamin E for preventing chemotherapy-induced peripheral neuropathy (CIPN). Methods: A comprehensive search from 1973 through July 2011 identified randomized controlled trials (RCTs) that reported the preventive effects of vitamin E on CIPN. The relative risk (RR) of CIPN with vitamin E supplementation, compared with placebo, was assessed with the Bayesian random effect model and expressed as RR with a 95 % credible-interval (CrI). Bayesian outcome probabilities were calculated as the probability (P) of RR < 1. Results: Five RCTs, involving 319 patients, were identified. Upon pooling these RCTs, vitamin E supplementation (300 - 600 mg/day) had a significant effect on CIPN prevention (RR 0.43; 95 % CrI 0.10 - 1.00, P = 97.5 %). Subgroup analysis by chemotherapeutic agent type was only available for cisplatin and showed that vitamin E supplementation significantly reduced the incidence of CIPN (RR 0.26; 95 % CrI 0.06 - 0.89, P = 98.1 %). Furthermore, there were no adverse effects caused by vitamin E supplementation in any of the RCTs. Conclusion: Available data included in this meta-analysis show that vitamin E supplementation might significantly prevent CIPN. Currently, however, the data are insufficient to confidently conclude the true value. Large-scale, rigorously designed RCTs are needed to confirm the role of vitamin E supplementation in CIPN prevention.
    International Journal for Vitamin and Nutrition Research 04/2013; 83(2):101-11.
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    ABSTRACT: The main function of vitamin E is to protect against scavenging of reactive oxygen species; it is the primary protective agent against lipid peroxidation. Overt vitamin E deficiency is present only in patients with severe malnutrition and certain chronic diseases. The latest Recommended Dietary Allowance for vitamin E is based on the correlation between hydrogen peroxide-induced erythrocyte lysis and plasma α-tocopherol concentrations (Institute of Medicine, United States), or the prevention of lipid peroxidation (National Nutrition Societies of Germany, Austria and Switzerland, D-A-CH). According to the current recommendations, the reference plasma concentration for vitamin E is 12 - 46 µmol/L (daily intake of 15 - 30 mg α-tocopherol equivalents). Epidemiological studies suggest a beneficial effect of vitamin E on cardiovascular health at a plasma concentration of 30 µmol/L (a daily intake of ~ 50 IU). Vitamin E is also an important micronutrient for maintaining the immune system, especially in the elderly. A workshop was organized with the main objective to propose a concept for developing markers of status, functionality, and health in the field of nutritional research, in order to define desirable vitamin E requirements in healthy individuals.
    International Journal for Vitamin and Nutrition Research 04/2013; 83(2):129-36.
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    ABSTRACT: Hyperhomocysteinemia among vegetarians and vegans is caused mostly by vitamin B12 deficiency. A C-to-T mutation in the methylenetetrahydrofolate reductase (MTHFR) gene results in a thermolabile MTHFR, which may affect homocysteine (Hcy) levels. The importance of this gene mutation among populations depends on the T allele frequency. Blood Hcy, vitamin B12, folate, vitamin B6, and MTHFR C677T mutation status were determined in 109 vegans and 86 omnivores aged 30 - 50 years. The vegans had significantly higher Hcy levels than the omnivores, geometric means (95 % CI) 19.2 (17.0 - 21.7) µmol/L vs. 8.53 (8.12 - 8.95) µmol/L, p < 0.001. A C-to-T mutation in the vegans increased plasma Hcy, albeit insignificantly; geometric means 18.2 µmol/L, 20.4 µmol/L, and 30.0 µmol/L respectively in CC, CT, and TT MTHFR genotypes. There was also a significant decrease in serum folate; geometric means 12.1 ng/mL, 9.33 ng/mL, and 7.20 ng/mL respectively, in the CC, CT, and TT mutants, p = 0.006, and particularly, in the TT mutant compared with the CC wild type, 7.20 ng/mL vs. 12.1 ng/mL, p = 0.023. These findings were not seen in the omnivores. It was concluded that hyperhomocysteinemia is prevalent among Thai vegans due to vitamin B12 deficiency. C-to-T MTHFR mutation contributes only modestly to the hyperhomocysteinemia.
    International Journal for Vitamin and Nutrition Research 04/2013; 83(2):86-91.
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    ABSTRACT: More than two billion people suffer from anemia worldwide, and it is estimated that more than 50 % of cases are caused by iron deficiency. In this community intervention trial, we evaluated infants aged 10 to 23 months of age (n = 171) from two public child day-care centers. Intervention lasted 18 weeks. The 50-g individual portion (uncooked) of fortified rice provided 56.4 mg of elemental iron as ferric pyrophosphate. Capillary blood samples to test for anemia were taken at baseline and at endpoint. The objective of this study was to evaluate the impact of rice fortified with iron (Ultrarice®) on hemoglobin and anemia prevalence compared with standard household rice. For the fortified rice center, baseline mean hemoglobin was 113.7 ± 9.2 g/L, and at endpoint 119.5 ± 7.7 g/L, p < 0.0001; for the standard rice center, baseline mean hemoglobin value was 113.5 ± 40.7 g/L, and at endpoint 113.6 ± 21.0, p = 0.99. Anemia prevalence for the fortified rice center was 27.8 % (20/72) at baseline, and 11.1 % (8/72) at endpoint, p = 0.012; for the control center, 47.1 % (33/70) were anemic at baseline, and 37.1 % (26/70) at the end of the study, p = 0.23. The Number Needed to Treat (NNT) was 4. In this intervention, rice fortified with iron given weekly was effective in increasing hemoglobin levels and reducing anemia in infants.
    International Journal for Vitamin and Nutrition Research 02/2013; 83(1):59-66.
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    ABSTRACT: An excessive consumption of a high-fat diet (HFD) results in becoming overweight or obese, which triggers a chronic inflammatory condition that is associated with a high white blood cell count. Because of the potential for yerba maté (Ilex paraguariensis) (YM) to impact obesity, this study aimed to investigate the effects of YM consumption on the hematological response and on the production of interleukin (IL)-1α, IL-6, tumor necrosis factor (TNF)-α, and IL-10 by bone marrow cells from Wistar rats fed a HFD. Male Wistar rats were fed a control (CON) or HFD diet for twelve weeks. At the end of this period, the rats received YM (1 g/kg/day body weight) for 4 weeks. After euthanasia, hemograms and myelograms were evaluated, while the bone marrow cells were cultured in the presence or absence of lipopolysaccharide (LPS) to evaluate the production of IL-1α, IL-6, TNF-α, and IL-10. The consumption of YM reduced the body weight, the body adiposity, and the cholesterol levels in HFD-fed rats. Bone marrow cells from the HFD group produced more IL-1α, IL-6, and TNF-α, and less IL-10, when compared to cells from the control group, and YM consumption reduced the IL-1α, IL-6, and TNF-α production by the cells. However, cells from the HFD rats that were stimulated with LPS increased their IL-1α, IL-6, and TNF-α production, but YM consumption did not change this result. In summary, the consumption of YM affects the production of IL-1α, IL-6, and TNF-α by bone marrow cells, promotes weight loss, decreases the number of white blood cells, and significantly improves serum cholesterol level in HFD-fed rats. However, the bone marrow cells from the HFD+YM-fed rats challenged with LPS did not show improvement in the inflammatory response compared to the cells from animals fed only a HFD that were also challenged with LPS.
    International Journal for Vitamin and Nutrition Research 02/2013; 83(1):26-35.
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    ABSTRACT: Background: Prenatal supplementation with micronutrients may increase birth weight and thus improve infant health and survival in settings where infants and children are at risk of micronutrient deficiencies. Objective: To assess whether vitamin A and/or zinc supplementation given during pregnancy can improve birth weight, birth length, neonatal morbidity, or infant mortality. Methods: A double-blind, randomized controlled trial supplementing women (n = 2173) in Central Java, Indonesia throughout pregnancy with vitamin A, zinc, combined vitamin A+zinc, or placebo. Results: Out of 2173 supplemented pregnant women, 1956 neonates could be evaluated. Overall, zinc supplementation improved birth length compared to placebo or combined vitamin A+zinc (48.8 vs. 48.5 cm, p = 0.04); vitamin A supplementation improved birth length compared to placebo or combined vitamin A+zinc (48.7 vs. 48.2 cm, p = 0.04). These effects remained after adjusting for maternal height, pre-pregnancy weight, and parity. There was no effect of supplementation on birth weight, the proportion of low birth weight, neonatal morbidity, or mortality. Conclusions: Prenatal zinc or vitamin A supplementation demonstrates a small but significant effect on birth length, but supplementation with zinc, vitamin A or a combination of zinc and vitamin A, have no effect on birth weight, neonatal morbidity, or mortality.
    International Journal for Vitamin and Nutrition Research 02/2013; 83(1):14-25.
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    ABSTRACT: Dietary supplementation of fish oils (n-3 PUFA) have been observed to affect insulin action and hence metabolism, affecting the ability to carry out work. Here we examine the effects of fish oil supplementation in conjunction with a glucose load during exertion, on markers of substrate utilization. A pre-test, post-test design was performed on ten healthy young males to assess the effects of 4 weeks fish oil supplementation on muscle metabolism during incremental exertion. Breath-bybreath analysis for respiratory exchange ratio (RER) along with blood lactate and blood glucose were determined at baseline, during exercise following an acute glucose bolus (10 % solution at 4 mL/kg/bw), and again following supplementation of 4.2 (2.2 g EPA, 1.4 g DHA). To examine the effect of fish oil on blood flow, Doppler ultrasound was used to assess femoral blood flow at rest. Following consumption of fish oils, exercising blood glucose and RER were seen to change significantly (4.66 ± 0.44 vs. 4.58 ± 0.31 mmol.L-1 and 0.97 ± 0.03 vs. 0.99 ± 0.04; p < 0.05). Resting femoral arterial blood flow was seen to increase significantly (p < 0.05) pre- to post- test; 0.26 ± 0.02 – 0.30 ± 0.03 L.min-1. Specific population groups such as those undertaking high-intensity exercise, and clinical groups such as intermittent claudicants, may benefit from the effects of fish oil supplementation.
    International Journal for Vitamin and Nutrition Research 01/2013; 83(6).