Journal of the American College of Nutrition (J AM COLL NUTR)

Publisher: American College of Nutrition (U.S.), Taylor & Francis (Routledge)

Journal description

The Journal of the American College of Nutrition (JACN) accepts the following types of submissions: Original and innovative research in nutrition with useful application for researchers, physicians, and other health care professionals; Critical reviews on pertinent nutrition topics that highlight key teaching points and relevance to nutrition; Letters to the editors and commentaries on important issues in the field of nutrition; Abstract clusters on nutritional topics with editorial comments; Book reviews; Abstracts from the annual meeting of the American College of Nutrition in the October issue.

Current impact factor: 1.68

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 1.676
2012 Impact Factor 1.738
2011 Impact Factor 2.29
2010 Impact Factor 1.95
2009 Impact Factor 2.362
2008 Impact Factor 2.162
2007 Impact Factor 2.276
2006 Impact Factor 2.452
2005 Impact Factor 2.206
2004 Impact Factor 2.802
2003 Impact Factor 2.979
2002 Impact Factor 2.174
2001 Impact Factor 1.531
2000 Impact Factor 1.564
1999 Impact Factor 1.612
1998 Impact Factor 1.558
1997 Impact Factor 1.466
1996 Impact Factor 1.226
1995 Impact Factor 0.925
1994 Impact Factor 1.361
1993 Impact Factor 1.162
1992 Impact Factor 0.856

Impact factor over time

Impact factor
Year

Additional details

5-year impact 2.97
Cited half-life 9.10
Immediacy index 0.15
Eigenfactor 0.01
Article influence 0.85
Website Journal of the American College of Nutrition website
Other titles Journal of the American College of Nutrition, JACN
ISSN 0731-5724
OCLC 8227639
Material type Periodical, Internet resource
Document type Journal / Magazine / Newspaper, Internet Resource

Publisher details

Taylor & Francis (Routledge)

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Some individual journals may have policies prohibiting pre-print archiving
    • On author's personal website or departmental website immediately
    • On institutional repository or subject-based repository after either 12 months embargo
    • Publisher's version/PDF cannot be used
    • On a non-profit server
    • Published source must be acknowledged
    • Must link to publisher version
    • Set statements to accompany deposits (see policy)
    • The publisher will deposit in on behalf of authors to a designated institutional repository including PubMed Central, where a deposit agreement exists with the repository
    • STM: Science, Technology and Medicine
    • Publisher last contacted on 25/03/2014
    • This policy is an exception to the default policies of 'Taylor & Francis (Routledge)'
  • Classification
    ​ green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Objective: To assess the relationship between socioeconomic and anthropometric data, frequency of food consumption, and the development of noncommunicable diseases (NCDs) in patients from a small rural town in northeastern Brazil. Methods: A cross-sectional questionnaire study was performed on patients from the Lagarto City Hospital (n = 50) and from family health units (n = 370). Results: The 420 patients in the study had one or more NCDs such as hypertension, type 2 diabetes mellitus, and dyslipidemia. The mean age was 63.1 ± 8.7 years for both sexes. The typical patient was of mixed or black descent (66%), a farmer, and of low socioeconomic status and education; 100% of men and 84% of women were illiterate or had less than 4 years of schooling. Approximately 50% of women and 89% of men were married and most had never used tobacco or were ex-smokers. The body mass index (BMI) of the study population was 29.4 ± 5.5 kg/m(2), where 70% of the patients were type 2 diabetic with waist circumferences of 99.8 ± 21.2 cm for men and 98.1 ± 13.9 cm for women. The correlation between BMI and waist circumference was r = 0.88. Even with the use of medication, total cholesterol levels of above 240 mg/dL were recorded in 10% of women and about 5% of men. Likewise, 10% of women and 100% of men had triglyceride levels above 200 mg/dL; glucose levels were 133.6 ± 47.4 mg/dL in men and 110.8 ± 38.8 mg/dL in women. Blood pressure values were high, even in patients using one or more antihypertensive drugs for at least 2 years (systolic pressure = 128.5 ± 18.2; diastolic pressure = 86.3 ± 8.9 mmHg). Indices considered above the limit recommended by the World Health Organization (WHO) were obtained for 60% of women and 100% of men. Our research revealed that this population is characterized by a relatively low intake of fats and oils. Nevertheless, 100% of patients consumed meat every day, 57.6% never consumed processed foods such as candy or soft drinks, and 89% consumed coffee daily. Furthermore, the consumption of fruits was very low: 46.6% of respondents never ate fruit and 7.8% rarely consumed fruit. Likewise, 68.2% reported never eating milk and dairy products. Vegetables were consumed by only 51.4% of the population and 38.5% rarely or never consumed green vegetables. Products made from wheat, maize, cassava, beans, and rice were often consumed by 59.2% of the population. Conclusions: Our results indicate that the studied population is affected by nutritional transition, in which the greater access to carbohydrates and animal proteins is associated with high BMI, with the vast majority overweight and suffering from uncontrolled hypertension despite the use of medications. The high consumption of carbohydrates and animal protein, rapid urbanization, and sedentary lifestyle are the main factors responsible for the epidemic of noncommunicable diseases, especially among people with low income and education. Men are particularly affected, with increased visceral fat characterized by an increased waist circumference.
    Journal of the American College of Nutrition 03/2015; DOI:10.1080/07315724.2014.926162
  • Journal of the American College of Nutrition 01/2015;
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    ABSTRACT: Background/Objective: Addition of viscous fiber to foods has been shown to significantly reduce postprandial glucose excursions. However, palatability issues and the variability in effectiveness due to different methods of administration in food limits it use. This study explores the effectiveness of a viscous fiber blend (VFB) in lowering postprandial glycemia using different methods of incorporation. Methods: Two acute, randomized, controlled studies were undertaken: Study 1: Twelve healthy individuals (mean ± SD, age: 36 ± 13 years, body mass index [BMI]: 27 ± 4 kg/m(2)) consumed 8 different breakfasts. All meals consisted of 50 g of available carbohydrate from white bread (WB) and 10 g margarine. Zero, 1, 2, or 4 g of the VFB was baked into WB or mixed with the margarine. Study 2: Thirteen healthy individuals (mean ± SD, age: 39 ± 17 years, BMI: 25 ± 5 kg/m(2)) consumed 6 test meals, consisting of 50 g of available carbohydrate from WB. Six capsules containing either cornstarch or VFB were taken at 4 different time points during the glucose tolerance test. After obtaining a fasting finger-prick blood sample, volunteers consumed the test meal over a 10-minute period. Additional blood samples were taken at 15, 30, 45, 60, 90, and 120 minutes from the start of the meal. For study 2, an additional fasting sample was obtained at -30 minutes. Results: Study 1: Irrespective of VFB dose, glucose levels were lower at 30 and 45 minutes when VFB was mixed into the margarine compared to the control (p < 0.05). Incremental areas under the curve were significantly lower compared to control when 4 g of VFB was mixed into the margarine. Study 2: There was no effect of the VFB on postprandial glucose levels when administered in capsules. Conclusion: Incorporation of VFB into margarine was more effective in lowering postprandial glycemia than when the VFB was baked into bread and no effect when given in capsules.
    Journal of the American College of Nutrition 10/2014; 33(5):1-6. DOI:10.1080/07315724.2014.905762
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    ABSTRACT: Objective: The link between stress-related increases in inflammatory markers, hepcidin, and iron status are poorly understood, especially in developing countries like India. The aim of the study was to examine the relationship between adolescent life-event stress (ALES), inflammatory markers, and its association with hepcidin and biomarkers of iron status among adolescent boys. Methods: Data pertaining to a subsample of 145 participants from a cross-sectional, school-based study recruiting 370 adolescent boys aged 15-19 years, from 5 schools in Hyderabad, India, were analyzed. Stress was assessed using the ALES scale, psychological distress by the General Health Questionnaire-2 (GHQ-12), and approach and avoidance coping using the Coping Strategies Scale. Biomarkers of iron and concentrations of other micronutrients, hepcidin, IL-6 and C-reactive protein (CRP) in plasma were analyzed. Data were subjected to regression, path analyses, and analysis of covariance (ANCOVA). Results: ALES was a significant predictor of interleukin (IL)-6 (β = 0.196, p = 0.012), CRP (β = 0.217, p = 0.010), and log hepcidin (β = 0.228, p = 0.006). Hepcidin correlated significantly (p < 0.001) with IL-6 (r = 0.344) and CRP (r = 0.370) but not with the biomarkers of iron status. Path analysis showed that the model had an acceptable fit, with a root mean square error of approximation of 0.019, 90% confidence interval (CI) of 0.00-0.074, comparative fit index of 0.988, chi-square p = 0.393, and chi-square/df of 1.053. Conclusions: Adolescent life-event stress is associated with elevated IL-6 and hepcidin concentration but not hypoferremia. These findings may help in iron supplementation programs for tackling anemia.
    Journal of the American College of Nutrition 10/2014; 33(5):1-9. DOI:10.1080/07315724.2013.875417
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    ABSTRACT: Objective: The objective of the study was to investigate the effects of a galacto-oligosaccharides (GOS)-supplemented formula on the intestinal microbiota in healthy term infants, with a specific consideration for gastrointestinal symptoms as colic, stool frequency and consistency, regurgitation. Methods: This was a randomized, double-blind, controlled, parallel-group clinical trial performed simultaneously by 6 centers in Italy. Three groups were considered: breastfed, formula-fed, and GOS-supplemented formula-fed infants. Formula-fed infants were randomized to receive either the control or the study formula and consume the assigned formula exclusively until the introduction of complementary feeding. The nutritional composition of the 2 formulas were identical, apart from the supplemented GOS (0.4 g/100 mL) in the study formula. Four different types of bacteria were evaluated in order to assess the efficacy of GOS-supplemented formula on infants: Bifidobacterium, Lactobacillus, and Clostridium, Escherichia coli. Results: A total of 199 breastfed infants and 163 formula-fed infants were recruited. When considering stool frequency and consistency, GOS-supplemented formula presented normal and soft stools in the majority of episodes (89%). In the supplemented group the incidence of colic was lower with respect to the control group. A significantly lower count of Clostridium and a higher count of Bifidobacterium were found when comparing study formula and control formula in infants with colic. In children with colic the ratio between Clostridium count and Bifidobacterium and Lactobacillus count was in favor of the latter two when considering the GOS-supplemented formula group with respect to the control one. Conclusions: The prebiotic-supplemented formula mimicked the effect of human milk in promoting Bifidobacterium and Lactobacillus growth and in inhibiting Clostridium growth, resulting in a significantly lower presence of colic.
    Journal of the American College of Nutrition 10/2014; 33(5):1-9. DOI:10.1080/07315724.2013.878232
  • Journal of the American College of Nutrition 09/2014; 33(5):353. DOI:10.1080/07315724.2014.976144
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    ABSTRACT: Background: The fat mass and obesity-associated (FTO) single nucleotide polymorphisms (SNPs; rs1421085, rs17817449, rs9939609, rs8050136) and macronutrient intake (carbohydrate, protein, fat, total calories) are associated with body mass index (BMI). However, the mechanism for this relationship has not been fully elucidated. Objective: This study examined whether macronutrient intake mediates the association between FTO SNPs and BMI. Design: Baseline cross-sectional data from the Atherosclerosis Risk in Communities (ARIC) study of whites (n = 10,176) and African Americans (n = 3641) aged 45 to 64 years were analyzed. Results: In linear regression models with BMI as the dependent variable, FTO SNPs were significantly associated with higher BMI after adjusting for covariates. The addition of energy-adjusted macronutrients attenuated the FTO effect estimates, indicating partial mediation. In whites, β ranged from 0.40 (95% confidence interval [CI], 0.20, 0.60) for rs17817449 heterozygous carriers to 0.93 (95% CI, 0.64, 122) for rs8050136 homozygous carriers; for African Americans rs17817449 homozygous carriers β was 0.65 (95% CI, 0.03, 1.27). In models with macronutrient intake as the dependent variable, all FTO SNPs were associated with higher protein intake for homozygous carriers after adjusting for BMI and other covariates. Among whites, β ranged from 1.44 (95% CI, 0.51, 2.37) for rs8050136 to 1.73 (95% CI, 0.85, 2.61) for rs17817449; among African American rs8050136 homozygous carriers β was 2.46 (95% CI, 0.77, 4.14). In mediation analysis, in whites only, FTO high-risk alleles were associated with higher BMI partly through their small effects on carbohydrate and protein intake. Conclusions: These findings suggest that in adults, the relationship between FTO variants and BMI is not primarily through mediation of food intake.
    Journal of the American College of Nutrition 08/2014; 33(4):1-11. DOI:10.1080/07315724.2013.879458
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    ABSTRACT: Objective: To describe how frequency and characteristics of traditional meal and non-meal occasions vary by age, gender, presence of children, and body mass index (BMI). Design: A cross-sectional survey was administered to a national demographically balanced sample of adults via an online market research panel. Setting: Online survey. Subjects: Survey respondents were in the 18- to 80-year-old age range and had consumed any food or beverage at home or away from home the previous day. The sample included 2702 adults reporting on 6689 eating/drinking occasions. Most (80.3%) had no children at home; 43.5% were male and about two thirds were overweight/obese. Measures of outcome: Eating occasion characteristics and goals by age, gender, presence of children, and BMI. Results: Older respondents were more likely to report planning traditional meal occasions and report on a breakfast occasion than younger respondents. Two prominent reasons that triggered consumption occasions were habit and hunger/thirst with one dominant benefit of satisfying hunger or thirst. Habit and nutrition played a larger role as a goal for eating occasions for older compared to younger respondents. When children were present in the household, respondents had a goal of connecting with "family, friends, or colleagues" at dinner compared to those without children. Few gender differences were noted; however, women more often reported goals of satisfying hunger/thirst and taste at lunch than men. BMI levels were related to a range of triggers, goals, and behaviors but not as prominently as the relationships observed with age. Those with BMI ≥ 30 were less health conscious regarding dinner and breakfast consumption compared to those with a lower BMI. Conclusions: Among demographic variables, age differences were noted in relation to eating occasion characteristics more often than other demographic characteristics or BMI. Understanding these differences can be beneficial in tailoring promotion of healthful intake at specific eating occasions for particular subgroups.
    Journal of the American College of Nutrition 08/2014; 33(4):1-13. DOI:10.1080/07315724.2014.887485
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    ABSTRACT: Background: The blood glucose-lowering effects of β-glucan from oats and barley depend on the amounts consumed and their rheological properties. This has been recently challenged with growing evidence that the food matrix may also be an important factor in predicting its physiological response. Objective: The objective of this study was to examine the effects of varying doses of β-glucan from oats and barley and added to a snack bar on postprandial glycemia. Design: In a randomized crossover study, 12 healthy males and females consumed one of 8 snack bars containing 0 (control), 1.5, 3, and 6 g of β-glucan derived from oats or barley or 3 white bread controls. All treatments contained 50 g of available carbohydrate. Blood glucose concentrations were measured after ingestion of the treatments over 2 hours. Results: Incorporation of 1.5 to 6 g of β-glucan into snack bars had no additional glucose-lowering benefits irrespective of dose and source compared to the control bars (0 g β-glucan), suggesting that both the solid food matrix and composition of the bars may play a role in their effects on glycemic response. All bars reduced blood glucose area under the curve (AUC) by an average of 25% (p < 0.05) compared to the mean of the 3 white bread controls. Conclusion: Adding β-glucan from oats and barley to the snack bar formulation used in this study did not yield any additional benefits beyond the glucose-lowering effects of the snack bars themselves.
    Journal of the American College of Nutrition 08/2014; DOI:10.1080/07315724.2013.875366
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    ABSTRACT: Purpose: To evaluate and compare the levels of free fatty acids between senile cataract patients and normal controls. Methods: Fifty consecutive patients with newly diagnosed senile cataract and 50 age- and gender-matched controls were evaluated. Subjects/patients were randomized according to selection criteria. The levels of free fatty acids (FFAs) in serum were measured by gas chromatography-mass spectrometry (GC-MS). Sixteen fatty acids from 14:0 to 24:1 were identified. The values were compared between cataract and control groups by parametric independent sample test and Mann-Whitney U tests. Results: A significant decrease was observed in arachidonic acid (C20:4n-6, ARA), cis-4,7,10,13,16,19-docosahexaenoic acid (C22:6n-3, DHA), tetracosanoic acid (C24: 0), cis-7,10,13,16,19-docosapentaenoic acid (C22:5n-6, DPA), total n-3 long-chain polyunsaturated fatty acids (LC-PUFAs), total n-6 LC-PUFAs, total fatty acids, unsaturated fatty acids (USFAs), polyunsaturated fatty acids (PUFAs), and nonessential fatty acid levels in patients with senile cataract in comparison with healthy persons (p < 0.05). Conclusions: The levels of FFA including DPA, tetracosanoic acid, ARA, and DHA were significantly lower in the senile cataract group compared to that in the normal controls. FFA may be helpful in preventing senile cataract.
    Journal of the American College of Nutrition 07/2014; 33(5):1-6. DOI:10.1080/07315724.2013.875420
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    ABSTRACT: Objective: Dairy foods help achieve essential nutrient adequacy. This role may be conflicted where so-called chronic diseases prevail. We have examined associations between dairy intake and mortality where dairy foods have not been traditional. Methods: A representative Taiwanese cohort of 3810 subjects, aged 19-64 years, derived from the Nutrition and Health Survey in Taiwan (NAHSIT, 1993-1996) was linked to death registration (1993-2008). Participants were categorized by 4 dairy weekly intake frequencies from 0 to >7 times. Mortality hazard ratios (HRs) with 95% confidence intervals (CIs) were calculated using Cox proportional-hazards models. Results: Nonconsumers of dairy products included 30.7% of the men and 22.1% of the women. Adverse sociodemographic and personal behaviors were generally significantly associated with lower dairy consumption. After adjustment for covariates, together with body mass index (BMI) and supplement use, those with 3-7 times/week intakes had an HR (95% CI) for all-cause mortality of 0.61 (0.39-0.96) with a significant dose-response trend (p = 0.043). Similarly, the HR for cardiovascular disease (CVD) mortality with dairy weekly intake frequency >7 was 0.14 (0.02-0.97) with a significant linear trend (p = 0.007). For stroke, the corresponding HR (95% CI) was 0.03 (0.00-0.28) with a linear trend. By age and with adjustment for dietary quality, food, and calcium or vitamin D intake, significance and dose-response relationships remained. Dairy intake and cancer mortality were not associated. Conclusion: In a Chinese food culture, a dairy foods intake in adults up to 7 times a week does not increase mortality and may have favorable effects on stroke.
    Journal of the American College of Nutrition 07/2014; DOI:10.1080/07315724.2013.875328