Effect of iron supplementation on maximal oxygen uptake in female athletes

Background/Aim. Iron is a vital constituent of hemoglobin, myoglobin, and some mitochondrial enzymes; therefore, body iron deficiency may result in reduced aerobic capacity. The aim of this study was to evaluate the effects of daily oral iron supplementation on body iron status, and the maximal oxygen uptake (VO2max) in female athletes with latent iron deficiency, as well as with irondeficiency anemia. Methods. A total of 37 female volleyball players were included in the study. Seventeen female athletes had latent iron deficiency, and 20 ones iron deficiency anemia. Both groups were divided into the experimental and the control group. The experimental groups received a daily oral iron supplement (200 mg ferrous sulfate), for a two-month training course. Iron status was determined by serum parameters as follows: red blood cells count, hemoglobin concentration, serum iron and ferritin levels, an unsaturated iron binding capacity, total iron binding capacity and transferrin saturation. VO2max was determined by an indirect test. Results. Statistical difference between the latent iron deficient group versus the iron deficient anemic group was found regarding VO2max (p < 0.001). There were correlations between hemoglobin concentration and VO2max in the latent iron deficient group, as well as in the iron deficient anaemic group (p < 0.05). After two months, there was a significant increase in VO2max in all groups (from 7.0% to 18.2%). Values of VO2max at the end of training period were significantly different (45.98 ? 1.76 vs 42.40 ? 1.22 mL/kg/min; p <0.001) between the experimental and the control group only in female athletes with iron deficiency anemia. After the supplementation, markers of iron status were significantly higher in supplemented groups than in the controls. Conclusion. VO2max was significantly lower in the iron deficient anemic group versus the latent iron deficient group. Iron supplementation during a two-month training period significantly improved body iron status in the iron deficient female athletes with or without anemia, and significantly increased VO2max only in the subjects with iron deficiency anemia.

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Consumption of a Double-Fortified Salt Affects Perceptual, Attentional, and Mnemonic Functioning in Women in a Randomized Controlled Trial in India

Journal of Nutrition ◽

10.3945/jn.117.251587 ◽

2017 ◽

Vol 147 (12) ◽

pp. 2297-2308 ◽

Cited By ~ 6

Author(s):

Michael J Wenger ◽

Laura E Murray-Kolb ◽

Julie EH Nevins ◽

Sudha Venkatramanan ◽

Gregory A Reinhart ◽

...

Keyword(s):

Iron Deficiency ◽

Iron Status ◽

Controlled Trial ◽

Reproductive Age ◽

Deficiency Anemia ◽

Control Group ◽

Attention And Memory ◽

Double Blind ◽

Iron Deficient ◽

Mnemonic Function

Abstract Background: Iron deficiency and iron deficiency anemia have been shown to have negative effects on aspects of perception, attention, and memory. Objective: The purpose of this investigation was to assess the extent to which increases in dietary iron consumption are related to improvements in behavioral measures of perceptual, attentional, and mnemonic function. Methods: Women were selected from a randomized, double-blind, controlled food-fortification trial involving ad libitum consumption of either a double-fortified salt (DFS) containing 47 mg potassium iodate/kg and 3.3 mg microencapsulated ferrous fumarate/g (1.1 mg elemental Fe/g) or a control iodized salt. Participants' blood iron status (primary outcomes) and cognitive functioning (secondary outcomes) were assessed at baseline and after 10 mo at endline. The study was performed on a tea plantation in the Darjeeling district of India. Participants (n = 126; 66% iron deficient and 49% anemic at baseline) were otherwise healthy women of reproductive age, 18–55 y. Results: Significant improvements were documented for iron status and for perceptual, attentional, and mnemonic function in the DFS group (percentage of variance accounted for: 16.5%) compared with the control group. In addition, the amount of change in perceptual and cognitive performance was significantly (P < 0.05) related to the amount of change in blood iron markers (mean percentage of variance accounted for: 16.0%) and baseline concentrations of blood iron markers (mean percentage of variance accounted for: 25.0%). Overall, there was evidence that the strongest effects of change in iron status were obtained for perceptual and low-level attentional function. Conclusion: DFS produced measurable and significant improvements in the perceptual, attentional, and mnemonic performance of Indian female tea pickers of reproductive age. This trial was registered at clinicaltrials.gov as NCT01032005.

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Iron supplementation in goitrous, iron-deficient children improves their response to oral iodized oil

Acta Endocrinologica ◽

10.1530/eje.0.1420217 ◽

2000 ◽

pp. 217-223 ◽

Cited By ~ 33

Author(s):

M Zimmermann ◽

P Adou ◽

T Torresani ◽

C Zeder ◽

R Hurrell

Keyword(s):

Iron Deficiency ◽

Iron Deficiency Anemia ◽

Iron Supplementation ◽

Thyroid Volume ◽

Oral Iron ◽

Deficiency Anemia ◽

Urinary Iodine Concentration ◽

Iodized Oil ◽

Iron Deficient ◽

Group 2

OBJECTIVE: In developing countries, many children are at high risk for both goiter and iron-deficiency anemia. Because iron deficiency may impair thyroid metabolism, the aim of this study was to determine if iron supplementation improves the response to oral iodine in goitrous, iron-deficient anemic children. DESIGN: A trial of oral iodized oil followed by oral iron supplementation in an area of endemic goiter in the western Ivory Coast. METHODS: Goitrous, iodine-deficient children (aged 6-12 years; n=109) were divided into two groups: Group 1 consisted of goitrous children who were not anemic; Group 2 consisted of goitrous children who were iron-deficient anemic. Both groups were given 200mg oral iodine as iodized oil. Thyroid gland volume using ultrasound, urinary iodine concentration (UI), serum thyroxine (T(4)) and whole blood TSH were measured at baseline, and at 1, 5, 10, 15 and 30 weeks post intervention. Beginning at 30 weeks, the anemic group was given 60mg oral iron as ferrous sulfate four times/week for 12 weeks. At 50 and 65 weeks after oral iodine (8 and 23 weeks after completing iron supplementation), UI, TSH, T(4) and thyroid volume were remeasured. RESULTS: The prevalence of goiter at 30 weeks after oral iodine in Groups 1 and 2 was 12% and 64% respectively. Mean percent change in thyroid volume compared with baseline at 30 weeks in Groups 1 and 2 was -45.1% and -21.8% respectively (P<0.001 between groups). After iron supplementation in Group 2, there was a further decrease in mean thyroid volume from baseline in the anemic children (-34.8% and -38.4% at 50 and 65 weeks) and goiter prevalence fell to 31% and 20% at 50 and 65 weeks. CONCLUSION: Iron supplementation may improve the efficacy of oral iodized oil in goitrous children with iron-deficiency anemia.

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Effects of Iron Deficiency Anemia and Its Rapid Correction on the Serum Metabolomic Profile of Rhesus Infants

Current Developments in Nutrition ◽

10.1093/cdn/nzaa054_142 ◽

2020 ◽

Vol 4 (Supplement_2) ◽

pp. 1070-1070

Author(s):

Brian Sandri ◽

Gabriele Lubach ◽

Eric Lock ◽

Michael Georgieff ◽

Pamela Kling ◽

...

Keyword(s):

Iron Deficiency ◽

Iron Deficiency Anemia ◽

Acid Production ◽

Iron Status ◽

Deficiency Anemia ◽

Iron Dextran ◽

Metabolomic Profile ◽

Intramuscular Injections ◽

Iron Deficient ◽

Rapid Correction

Abstract Objectives To determine whether rapid correction of iron deficiency using intramuscular iron dextran normalizes serum metabolomic changes in a nonhuman primate model of iron deficiency anemia (IDA). Methods Blood was collected from naturally iron-sufficient (IS; n = 10) and IDA (n = 12) male and female infant rhesus monkeys (Macaca mulatta) at 6 months of age. IDA infants were treated with intramuscular injections of iron dextran, 10 mg/weekly for 4–8 weeks. Iron status was reevaluated following treatment using hematological measurements and sera were metabolically profiled using HPLC/MS with isobaric standards for identification and quantification. Results Early-life iron deficiency anemia negatively affects many cellular metabolic processes, including energy production, electron transport, and oxidative degradation of toxins. Slow iron repletion with dietary supplementation restores iron deficient monkeys from a hematological perspective, but the serum metabolomic profile remains differed from monkeys that had been iron sufficient their entire life. Whether rapid iron restoration through intramuscular injections of iron dextran normalizes serum metabolomic profile is not known. A total of 654 metabolites were measured with differences in 53 metabolites identified between IS and IDA monkeys at 6 months (P 0.05). Pathway analyses provided evidence of altered liver function, hypometabolic state, differential essential fatty acid production, irregular inosine and guanosine metabolism, and atypical bile acid production in IDA infants. After treatment, iron-related hematological parameters had recovered, but the formerly IDA infants remained metabolically distinct from the IS infants, with 225 metabolites differentially expressed between the groups. Conclusions As with slow iron repletion, rapid iron repletion does not normalize the altered serum metabolomic profile in rhesus infants with IDA, suggesting the need for iron supplementation in the pre-anemic stage. Funding Sources National Institutes of Health.

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Effects of Iron Status and Iron Supplementation on Salmonella Typhimurium and Plasmodium Yoelii Infection In Mice

Blood ◽

10.1182/blood.v116.21.2052.2052 ◽

2010 ◽

Vol 116 (21) ◽

pp. 2052-2052

Author(s):

Eldad A. Hod ◽

Eric H. Ekland ◽

Shruti Sharma ◽

Boguslaw S. Wojczyk ◽

David A. Fidock ◽

...

Keyword(s):

Iron Deficiency ◽

Salmonella Typhimurium ◽

Median Survival ◽

Iron Supplementation ◽

Iron Status ◽

Plasmodium Yoelii ◽

Oral Iron ◽

Deficiency Anemia ◽

Iron Deficient ◽

Deficient Mice

Abstract Abstract 2052 To clarify the interactions between iron status, oral iron supplementation, and bacterial and malarial infections, we examined iron-replete mice and mice with dietary iron deficiency infected with Salmonella typhimurium, Plasmodium yoelii, or both, with and without oral iron administration. These studies were designed to identify potential mechanisms underlying the increased risk of severe illness and death in children in a malaria-endemic region who received routine iron and folic acid supplementation during a randomized, controlled trial in Pemba, Tanzania (Sazawal et al. Lancet 2006;367:133-43). To this end, weanling C57BL/6 female mice were fed an iron-replete or an iron-deficient diet, the latter of which resulted in severe iron deficiency anemia. Groups of mice were then infected by intraperitoneal injection of Salmonella typhimurium strain LT2, Plasmodium yoelii strain 17X parasites, or both. With Salmonella infection alone, iron-deficient mice had a median survival (7.5 days, N=8) approximately half that of iron-replete mice (13 days, N=10, p<0.0001). At death, the mean level of bacteremia was significantly higher in infected iron-deficient mice. In blood cultures performed at death, all iron-deficient mice were bacteremic, but bacteria were detected in only 4 of 10 iron-replete mice. Both iron-deficient and iron-replete Salmonella-infected mice had gross hepatosplenomegaly with hepatitis, distorted hepatic and splenic architecture, massive expansion of the splenic red pulp with inflammatory cells, and Gram-negative bacilli by tissue Gram stain. With P. yoelii infection alone, iron-deficient and iron-replete mice cleared the infection at similar rates (by ~13 days following infection, N=5 in each group) and no deaths due to parasitemia occurred. With Salmonella and P. yoelii co-infection, death was earlier than with Salmonella alone in iron-replete mice (median survival of 10 vs. 13 days; N=10 in each group; p=0.005), but not in iron-deficient mice (median survival of 7 vs. 7.5 days; N=10 and 8, respectively; p=0.8). To examine the effect of short-term oral iron supplementation with Salmonella infection alone, mice received daily iron (ferrous sulfate, 1 mg/kg) by gavage for 4 days before infection with Salmonella, and supplementation continued for a total of 10 days. After gavage, plasma non-transferrin-bound iron (NTBI) appeared at 1–2 hours with a mean peak level of approximately 5 μM. In iron-deficient mice, short-term oral iron supplementation did not fully correct the iron deficiency anemia or replenish iron stores. Oral iron supplementation reduced the median survival of both iron-deficient and iron-replete Salmonella-infected mice by approximately 1 day; the difference was significant only in the iron-replete group (N=5, p<0.05). In summary, these results indicate that iron deficiency decreases the survival of Salmonella-infected mice; the median survival of iron-deficient mice was approximately half that of those that were iron replete. These observations are similar to those in the Pemba sub-study in which iron-deficient children given placebo had a 200% increase in the risk of adverse events relative to iron-replete children. Iron deficiency had no apparent effect on the course of infection with P. yoelii but further studies with more virulent Plasmodium species are needed. Co-infection with Salmonella and Plasmodium significantly increased mortality as compared to single infections, but only in iron-replete mice. Oral iron supplementation of Salmonella-infected mice significantly decreased the median survival, but only of iron-replete animals; however, our study may have had insufficient power to detect an effect on iron-deficient mice. Systematic examination in mice of the effect of iron supplements on the severity of malarial and bacterial infection in iron-replete and iron-deficient states may ultimately help guide the safe and effective use of iron interventions in humans in areas with endemic malaria. Disclosures: No relevant conflicts of interest to declare.

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Effect of Maternal Iron Deficiency Anemia on the Iron Store of Newborns in Ethiopia

Anemia ◽

10.1155/2015/808204 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 9

Author(s):

Betelihem Terefe ◽

Asaye Birhanu ◽

Paulos Nigussie ◽

Aster Tsegaye

Keyword(s):

Iron Deficiency ◽

Iron Deficiency Anemia ◽

Serum Ferritin ◽

Complete Blood Count ◽

Iron Status ◽

Hemoglobin Concentration ◽

Deficiency Anemia ◽

Iron Store ◽

Cross Sectional ◽

Iron Deficient

Iron deficiency anemia among pregnant women is a widespread problem in developing countries including Ethiopia, though its influence on neonatal iron status was inconsistently reported in literature. This cross-sectional study was conducted to compare hematologic profiles and iron status of newborns from mothers with different anemia status and determine correlation between maternal and neonatal hematologic profiles and iron status in Ethiopian context. We included 89 mothers and their respective newborns and performed complete blood count and assessed serum ferritin and C-reactive protein levels from blood samples collected from study participants. Maternal median hemoglobin and serum ferritin levels were 12.2 g/dL and 47.0 ng/mL, respectively. The median hemoglobin and serum ferritin levels for the newborns were 16.2 g/dL and 187.6 ng/mL, respectively. The mothers were classified into two groups based on hemoglobin and serum ferritin levels as iron deficient anemic (IDA) and nonanemic (NA) and newborns of IDA mothers had significantly lower levels of serum ferritin (P=0.017) and hemoglobin concentration (P=0.024). Besides, newborns’ ferritin and hemoglobin levels showed significant correlation with maternal hemoglobin (P=0.018;P=0.039) and ferritin (P=0.000;P=0.008) levels. We concluded that maternal IDA may have an effect on the iron stores of newborns.

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Investigation of ischemia modified albumin levels in iron deficiency anemia

Turkish Journal of Biochemistry ◽

10.1515/tjb-2016-0315 ◽

2017 ◽

Vol 42 (3) ◽

Cited By ~ 1

Author(s):

Sibel Bilgili ◽

Giray Bozkaya ◽

Funda Kırtay Tütüncüler ◽

Murat Akşit ◽

Mehmet Yavuz

Keyword(s):

Iron Deficiency ◽

Iron Deficiency Anemia ◽

Iron Supplementation ◽

Binding Capacity ◽

Oral Iron ◽

Deficiency Anemia ◽

Control Group ◽

Ischemia Modified Albumin ◽

Before And After ◽

Anemia Group

AbstractObjective:The aim of this study was to evaluate the levels of ischemia-modified albumin (IMA), before and after oral iron supplementation in iron deficiency anemia and to determine the correlations between IMA and hemoglobin values.Study design:IMA, hemoglobin, hematocrit, mean corpuscular volume, ferritin, iron, total iron binding capacity and albumin levels were measured in 140 female patients with newly established as iron deficiency anemia before and after treatment and in 84 female healthy controls.Results:IMA levels were higher in the anemia group [0.340±0.082 absorbance units (ABSU)] compared to control group (0.291±0.077 ABSU). After oral iron therapy we saw that IMA values (0.392±0.080 ABSU) were higher than the IMA levels of the anemia group and the control group (p<0.05). Only in the anemia group there were negative correlations between IMA and hemoglobin, hematocrit.Conclusion:We conclude that the high levels of IMA in the anemia group might be attributed to hypoxia due to low hemoglobin levels. Iron is an oxidant element and oral iron supplementation may be associated with oxidative stress and may increase IMA levels by changing the albumin molecule. We thought that, IMA can be demonstrative of the severity of anemia since it was correlated with hemoglobin in the anemia group.

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Iron Status and Infant Feeding Practices in an Urban Ambulatory Center

PEDIATRICS ◽

10.1542/peds.72.1.33 ◽

1983 ◽

Vol 72 (1) ◽

pp. 33-36

Author(s):

P. David Sadowitz ◽

Frank A. Oski

Keyword(s):

Iron Deficiency ◽

Infant Feeding ◽

Iron Deficiency Anemia ◽

Iron Status ◽

Feeding Practices ◽

Deficiency Anemia ◽

Cow’S Milk ◽

Infant Feeding Practices ◽

Cow's Milk ◽

Iron Deficient

The relationship of infant feeding practices to iron status was examined in a group of 280 infants, 9 to 12 months of age, attending a "well-baby" clinic. Of this group, 7.6% were found to be iron depleted, 19.7% were iron deficient without anemia, and 8.2% were iron deficient with anemia. The incidence of iron-deficiency anemia was significantly greater in the black infants than the white infants (14.3% v 2.7%). The introduction of whole cow's milk into the diet had occurred prior to 6 months of age in 29.2% of the infants, and 62.1% of these infants had laboratory evidence of nutritional iron inadequacy, as contrasted with only 21.8% of those with iron deficiencies fed cow's milk after 6 months of age. Of the 21 infants with iron-deficiency anemia, 19 (90.5%) had been fed whole cow's milk prior to 6 months of age. Iron deficiency remains a nutritional problem for infants in an urban setting and is largely a result of the early introduction of whole cow's milk into the diet.

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Effect of Iron Deficiency Anemia on HbA1c in Non-Diabetics

Journal of Diabetes and Endocrine Association of Nepal ◽

10.3126/jdean.v4i1.30056 ◽

2020 ◽

Vol 4 (1) ◽

pp. 10-16

Author(s):

R.K. Bansal ◽

Y.R. Yadav ◽

H.S. Kulkarni ◽

Sonam ◽

S. Garg ◽

...

Keyword(s):

Iron Deficiency ◽

Iron Deficiency Anemia ◽

Hba1c Level ◽

Deficiency Anemia ◽

Control Group ◽

P Value ◽

Case Group ◽

Diabetic Patients ◽

Iron Deficient ◽

Hba1c Levels

Background: Glycated hemoglobin A1c is a well-known indicator of glycemic control in diabetes patients. It comprises of 5% of total hemoglobin in non-diabetic patients as well. Iron Deficiency Anemia is most common cause of anemia, especially in this part of the world. So, we study the effects of Iron deficiency Anemia on HbA1c levels in non-diabetic adults to determine whether the HbA1c levels increase if any. Methods: A 100 non-diabetic adult patients with Iron Deficiency anemia admitted in various medicine wards and attending OPDs of J.L.N. Medical College and 100 healthy controls were enrolled after fulfilled inclusion and exclusion criteria. Detailed history of clinical examination and biochemical examination was performed including HbA1c. Results: Mean HbA1c level is more in iron deficient Anemic non-diabetic patients in comparison to non-Anemic non-diabetic patients. Mean HbA1c is 5.01 ± 0.41 in control group. While mean HbA1c level in case group is 6.11 ± 0.42. The difference is statistically significant (p value <.001). Conclusion: Iron deficiency Anemia is independent factor affecting HbA1c level in non diabetic patients & it should be interpreted carefully in all iron deficient anemic patients.

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Iron Deficiency Anemia: Adverse Effects on Infant Psychomotor Development

PEDIATRICS ◽

10.1542/peds.84.1.7 ◽

1989 ◽

Vol 84 (1) ◽

pp. 7-17 ◽

Cited By ~ 1

Author(s):

Tomas Walter ◽

Isidora De Andraca ◽

Patricia Chadud ◽

Carmen G. Perales

Keyword(s):

Iron Deficiency ◽

Iron Deficiency Anemia ◽

Iron Status ◽

Oral Iron ◽

Iron Therapy ◽

Psychomotor Development ◽

Deficiency Anemia ◽

Placebo Control ◽

Double Blind ◽

Iron Deficient

In a double-blind, placebo-control prospective cohort study of 196 infants from birth to 15 months of age, assessment was made at 12 months of age of the relationship between iron status and psychomotor development, the effect of a short-term (10-day) trial of oral iron vs placebo, and the effect of long-term (3 months) oral iron therapy. Development was assessed with the mental and psychomotor indices and the infant behavior record of the Bayley Scales of Infant Development in 39 anemic, 30 control, and 127 nonanemic iron-deficient children. Anemic infants had significantly lower Mental and Psychomotor Developmental Index scores than control infants or nonanemic iron-deficient infants (one-way analysis of variance, P < .0001). Control infants and nonanemic iron-deficient infants performed comparably. No difference was noted between the effect of oral administration of iron or placebo after 10 days or after 3 months of iron therapy. Among anemic infants a hemoglobin concentration < 10.5 g/dL and duration of anemia of > 3 months were correlated with significantly lower motor and mental scores (P < .05). Anemic infants failed specifically in language capabilities and body balance-coordination skills when compared with controls. These results, in a design in which intervening variables were closely controlled, suggest that when iron deficiency progrsses to anemia, but not before, adverse influences in the performance of developmental tests appear and persist for at least 3 months despite correction of anemia with iron therapy. If these impairments prove to be long standing, prevention of iron deficiency anemia in early infancy becomes the only way to avoid them.

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Iron supplementation during pregnancy: what are the risks and benefits of current practices?

Applied Physiology Nutrition and Metabolism ◽

10.1139/h07-012 ◽

2007 ◽

Vol 32 (2) ◽

pp. 282-288 ◽

Cited By ~ 27

Author(s):

France M. Rioux ◽

Caroline P. LeBlanc

Keyword(s):

Iron Deficiency ◽

Pregnant Women ◽

Iron Deficiency Anemia ◽

Iron Supplementation ◽

Current Knowledge ◽

Iron Status ◽

Gastrointestinal Symptoms ◽

Deficiency Anemia ◽

Dietary Reference Intake ◽

Daily Dose

Iron-deficiency anemia is still prevalent among pregnant women living in industrialized countries such as Canada. To prevent this deficiency, iron supplements (30 mg/d) are routinely prescribed to Canadian pregnant women. Recently, dietary reference intakes for iron have increased from 18 and 23 mg/d during the second and third trimesters, respectively, to 27 mg/d throughout the pregnancy for all age groups. Whether this new recommendation implies an increase of iron dosage in supplements has not been answered. Are there any benefits or risks for the mother and her infant associated with iron supplementation during pregnancy? If iron supplementation is recommended, what should be the ideal dosage? This article reviews current knowledge on the potential negative or positive impact of iron supplementation during pregnancy on the outcomes of both infants and mothers. Based on the literature reviewed, a low daily dose of iron (30 mg elemental iron) during pregnancy improves women’s iron status and seems to protect their infants from iron-deficiency anemia. Several studies have also shown that a low daily dose of iron may improve birth weight even in non-anemic pregnant women. However, higher dosages are not recommended because of the potential negative effects on mineral absorption, oxidative pathways, and adverse gastrointestinal symptoms. To date, it is still not clear if health professionals should recommend routine or selective supplementation. However, neither routine nor selective iron supplementation during pregnancy is able to eliminate iron-deficiency anemia. Even though the dietary reference intake for iron during pregnancy has been recently increased, we do not recommend higher doses of iron in supplements designed for pregnant women.

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