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Ko A, O’Brien D, Rivera P, Mancl L, Hopkins S, Randall C, Nguyen DP, Chi DL. Identifying sources of variation in added sugar intake for Alaska Native children using a hair biomarker. Int J Circumpolar Health 2024; 83:2336286. [PMID: 38560896 PMCID: PMC10986438 DOI: 10.1080/22423982.2024.2336286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 03/25/2024] [Indexed: 04/04/2024] Open
Abstract
Sugars from sugar-sweetened beverages (SSBs) are an important risk factor for tooth decay. The study goal was to determine if there was variation in added sugar intake across communities and between and within households. In this cross-sectional study, intakes of total sugar, added sugar, and sugar-sweetened beverages (SSBs) were estimated for 282 Alaska Native children ages 0-10 years from 131 households in three Yukon-Kuskokwim (YK) Delta communities using biomarker equations based on hair carbon and nitrogen isotope ratios previously developed for the Yup'ik population. ANOVA was used to assess associations between each predictor (community and household) and outcome (estimated total sugars, added sugars, and SSB intake). Between- and within-household variation was estimated using a linear mixed-effects model with a random intercept for households with three or more children. There was no significant difference in mean estimated total sugar (p = 0.29), added sugar (p = 0.24), or SSB intake (p = 0.40) across communities. Significant variations were observed between and within households, with within-household variation amounting to 59% of the between-household variation. Added sugar intake in Alaska Native children from the three study communities is higher than the recommended maximum, and the variation is greater within households than between households.
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Affiliation(s)
- Alice Ko
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, USA
| | - Diane O’Brien
- Center for Alaska Native Health Research, Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska, Fairbanks, AK, USA
| | - Patricia Rivera
- Center for Alaska Native Health Research, Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska, Fairbanks, AK, USA
| | - Lloyd Mancl
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, USA
| | - Scarlett Hopkins
- Departments of Medicine and Obstetrics & Gynecology, Oregon Health & Science University, Portland, OR, USA
| | - Cameron Randall
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, USA
| | - Daisy Patiño Nguyen
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, USA
| | - Donald L. Chi
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, USA
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Hill CM, Nash SH, Hopkins SE, Boyer BB, OBrien DM, Bersamin A. Diet quality is positively associated with intake of traditional foods and does not differ by season in remote Yup'ik communities. Int J Circumpolar Health 2023; 82:2221370. [PMID: 37312577 PMCID: PMC10269404 DOI: 10.1080/22423982.2023.2221370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/15/2023] Open
Abstract
This study evaluated whether traditional food intake and diet quality differed by season in Yup'ik communities and examined the relationship between intake of traditional food groups and diet quality. Data were collected from 38 participants, ages 14-79 years, from two Yup'ik communities in Southwest Alaska from 2008 to 2010. Self-reported intake (24-h recalls) and dietary biomarker (nitrogen stable isotope ratio) data were collected twice in distinct seasons. Diet quality was assessed using the Healthy Eating Index. A paired sample t-test was used to test for seasonal differences in traditional food intake and diet quality, and linear regression was used to evaluate associations between traditional food intake and diet quality. Total traditional food intake and overall diet quality did not significantly differ by season, but there were differences in traditional food group intake and diet quality component scores. Diet quality was strongly associated with intake of traditional food groups including fish, tundra greens, and berries. Given the strong relationship between traditional food intake and diet quality, policies should aim to ensure continued access to traditional foods in Yup'ik communities amid environmental changes in the circumpolar North.
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Affiliation(s)
- Courtney M Hill
- Department of Biology and Wildlife, University of Fairbanks Alaska, Fairbanks, AK, USA
| | - Sarah H. Nash
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
- Department of Epidemiology, University of Iowa, Iowa City, IA, USA
| | - Scarlett E. Hopkins
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
- Department of Obstetrics and Gynecology, Oregon Health and Science University, Portland, OR, USA
| | - Bert B. Boyer
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
- Department of Obstetrics and Gynecology, Oregon Health and Science University, Portland, OR, USA
| | - Diane M. OBrien
- Department of Biology and Wildlife, University of Fairbanks Alaska, Fairbanks, AK, USA
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
| | - Andrea Bersamin
- Department of Biology and Wildlife, University of Fairbanks Alaska, Fairbanks, AK, USA
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
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Hill CM, Paschall MJ, Koller KR, Day GM, Lee FR, O’Brien DM, King DK, Palmer L, Thomas TK, Bersamin A. Obesity Prevalence and Dietary Factors Among Preschool-Aged Head Start Children in Remote Alaska Native Communities: Baseline Data from the " Got Neqpiaq?" Study. Child Obes 2023; 19:498-506. [PMID: 36473164 PMCID: PMC10541932 DOI: 10.1089/chi.2022.0143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background: American Indian and Alaska Native preschool-aged children experience a high prevalence of obesity, yet are under-represented in obesity prevention research. This study examined obesity prevalence and dietary risk factors among Alaska Native preschool-aged children in southwest Alaska. Methods: The study used baseline data from "Got Neqpiaq?" a culturally centered multilevel intervention focused on Yup'ik Alaska Native children, aged 3-5 years, enrolled in Head Start in 12 communities in southwest Alaska (n = 155). The primary outcomes were BMI percentile, overweight, and obesity. Dietary factors of interest were measured using biomarkers: traditional food intake (nitrogen stable isotope ratio biomarker), ultraprocessed food intake (carbon stable isotope ratio biomarker), and vegetable and fruit intake (skin carotenoid status biomarker measured by the Veggie Meter). Cardiometabolic markers (glycated hemoglobin [HbA1c] and blood cholesterol) were also measured. Results: Among the Yup'ik preschool-aged children in the study, the median BMI percentile was 91, and the prevalence of overweight or obesity was 70%. The traditional food intake biomarker was negatively associated with BMI, whereas the ultraprocessed foods and vegetable and fruit biomarkers were not associated with BMI. HbA1c and blood cholesterol were within healthy levels. Conclusions: The burden of overweight and obesity is high among Yup'ik preschool-aged children. Traditional food intake is inversely associated with BMI, which underscores the need for culturally grounded interventions that emphasize traditional values and knowledge to support the traditional food systems in Alaska Native communities in southwest Alaska. Registered with ClinicalTrials.gov #NCT03601299.
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Affiliation(s)
- Courtney M. Hill
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK, USA
- Department of Epidemiology, University of Washington, Seattle, WA, USA
| | - Mallie J. Paschall
- Prevention Research Center, Pacific Institute for Research and Evaluation, Berkeley, CA, USA
| | - Kathryn R. Koller
- Research Services, Alaska Native Tribal Health Consortium, Anchorage, AK, USA
| | - Gretchen M. Day
- Research Services, Alaska Native Tribal Health Consortium, Anchorage, AK, USA
| | - Flora R. Lee
- Research Services, Alaska Native Tribal Health Consortium, Anchorage, AK, USA
| | - Diane M. O’Brien
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - Diane K. King
- Center for Behavioral Health Research and Services, University of Alaska Anchorage, Anchorage, AK, USA
| | - Lea Palmer
- Head Start Program, Rural Alaska Community Action Program, Inc., Anchorage, AK, USA
| | - Timothy K. Thomas
- Research Services, Alaska Native Tribal Health Consortium, Anchorage, AK, USA
| | - Andrea Bersamin
- Center for Alaska Native Health Research, University of Alaska Fairbanks, Fairbanks, AK, USA
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Dierkes J, Dietrich S, Abraham K, Monien BH, McCann A, Borgå K, Weikert C. Stable isotope ratios of nitrogen and carbon as biomarkers of a vegan diet. Eur J Nutr 2023; 62:433-441. [PMID: 36087137 PMCID: PMC9899720 DOI: 10.1007/s00394-022-02992-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 08/24/2022] [Indexed: 02/07/2023]
Abstract
PURPOSE Dietary biomarkers can potentially overcome the limitations of self-reported dietary data. While in ecology and archaeology, stable isotope ratios of carbon and nitrogen are widely used as biomarkers, this is not the case in nutrition research. Since the abundance of the 13C and the 15N isotope differ in food sources from plant and animal origin, stable isotope ratios of carbon and nitrogen (δ13C and δ15N) may differ in human biological material. Here, we investigated the stable isotope ratios of nitrogen and carbon in serum and urine from vegans and omnivores. METHOD Measurement of δ15N and δ13C in serum and 24 h urine was performed by Elemental Analyzer-Isotope Ratio Mass Spectrometer in the cross-sectional study "Risks and Benefits of a Vegan Diet". The study included 36 vegans and 36 omnivores with a median age of 37.5 years (matched for age and sex), who adhered to their diet for at least 1 year. RESULTS Both δ15N and δ13C were significantly lower in both the serum and 24 h urine of vegans compared to omnivores. δ15N either in serum or urine had 100% specificity and sensitivity to discriminate between vegans and omnivores. Specificity of δ13C was also > 90%, while sensitivity was 93% in serum and 77% in urine. CONCLUSION δ15N both in serum and urine was able to accurately identify vegans and thus appears to be a promising marker for dietary habits.
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Affiliation(s)
- Jutta Dierkes
- Department of Clinical Medicine, Centre for Nutrition, Mohn Nutrition Research Laboratory, University of Bergen, Haukelandsbakken 15, 5021 Bergen, Norway ,Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway
| | - Stefan Dietrich
- Department of Food Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany
| | - Klaus Abraham
- Department of Food Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany
| | - Bernhard H. Monien
- Department of Food Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany
| | | | - Katrine Borgå
- Department of Biosciences, University of Oslo, Oslo, Norway
| | - Cornelia Weikert
- Department of Food Safety, German Federal Institute for Risk Assessment, 10589 Berlin, Germany
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Johnson JJ, Shaw PA, Wooller MJ, Venti CA, Krakoff J, Votruba SB, O'Brien DM. Amino Acid Nitrogen Isotope Ratios Respond to Fish and Meat Intake in a 12-Week Inpatient Feeding Study of Men. J Nutr 2022; 152:2031-2038. [PMID: 35511610 PMCID: PMC9445847 DOI: 10.1093/jn/nxac101] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/18/2022] [Accepted: 04/28/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND The natural abundance nitrogen stable isotope ratio (NIR) of whole tissue correlates with animal protein intakes, including meat and fish. Amino acid (AA) NIRs (NIRAAs) are more variable than the whole-tissue NIRs and may thus better differentiate among foods. OBJECTIVES We evaluated whether NIRAAs were associated with intakes of fish and meat and whether these dietary associations were larger than with whole-tissue NIRs. METHODS Men were recruited at the National Institute of Diabetes and Digestive and Kidney Diseases in Phoenix, Arizona, and randomly assigned to one of eight 12-wk inpatient dietary interventions, which varied the presence/absence of fish, meat, and sugar-sweetened beverages (SSBs) in all possible combinations. Fasting blood was drawn pre- and postintervention and plasma and RBC NIRAAs (free and protein-bound) were measured as secondary outcomes in 32 participants. Multivariable regression was used to determine responses of postintervention NIRAAs to dietary variables, and logistic regression was used to calculate receiver operating characteristic AUCs. RESULTS Most plasma NIRAAs increased with fish and meat intakes, but to a greater extent with fish intake. The largest increase in response to fish intake was plasma NIRLeucine (β = 2.19, SE = 0.26). The NIRThreonine decreased with both fish and meat intakes. Fewer RBC NIRAAs increased with fish intake, and only RBC NIRProline increased with meat intake. No plasma or RBC NIRAA responded to SSB intake. We identified fish intake with a high degree of accuracy using plasma NIRLeucine (corrected AUC, cAUC = 0.96) and NIRGlutamic acid/glutamine (cAUC = 0.93), and meat intake to a lower degree using plasma NIRProline (cAUC = 0.80) and RBC NIRProline (cAUC = 0.85). CONCLUSIONS Plasma and RBC NIRAAs were associated with fish and meat intakes but were not superior to whole-tissue stable isotope biomarkers in identifying these intakes in a US diet. This trial is registered at www.clinicaltrials.gov as NCT01237093.
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Affiliation(s)
| | - Pamela A Shaw
- Washington Health Research Institute, Kaiser Permanente, Seattle, WA, USA
| | - Matthew J Wooller
- Alaska Stable Isotope Facility, Water and Environmental Research Center, Institute of Northern Engineering, College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - Colleen A Venti
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases/NIH, Phoenix, AZ, USA
| | - Jonathan Krakoff
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases/NIH, Phoenix, AZ, USA
| | - Susanne B Votruba
- Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases/NIH, Phoenix, AZ, USA
| | - Diane M O'Brien
- Center for Alaska Native Health Research, Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK, USA
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Boyer BB, Hopkins SE, Wiener HW, Purnell JQ, O'Brien DM, Zhang CX, Aslan JE, Aliwarga T, Pomeroy JJ, Thummel KE, Tiwari HK. Habitual Intake of Marine-Derived n-3 PUFAs is Inversely Associated with a Cardiometabolic Inflammatory Profile in Yup'ik Alaska Native People. J Nutr 2022; 152:844-855. [PMID: 34871429 PMCID: PMC8891177 DOI: 10.1093/jn/nxab412] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/17/2021] [Accepted: 12/01/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The relationship between dietary n-3 PUFAs and the prevention of cardiometabolic diseases, including type 2 diabetes, is unresolved. Examination of the association between n-3 PUFAs and chronic low-grade inflammation in a population where many individuals have had an extremely high intake of marine mammals and fish throughout their lifespan may provide important clues regarding the impact of n-3 PUFAs on health. OBJECTIVES The aim of this study was to explore associations between concentrations of n-3 PUFAs resulting from habitual intake of natural food sources high in fish and marine mammals with immune biomarkers of metabolic inflammation and parameters of glucose regulation. METHODS A total of 569 Yup'ik Alaska Native adults (18-87 years old) were enrolled in this cross-sectional study between December 2016 and November 2019. The RBC nitrogen isotope ratio (NIR; 15N/14N) was used as a validated measure of n-3 PUFA intake to select 165 participant samples from the first and fourth quartiles of n-3 PUFA intakes. Outcomes included 38 pro- and anti-inflammatory cytokines and 8 measures of glucose homeostasis associated with type 2 diabetes risks. These outcomes were evaluated for their associations with direct measurements of EPA, DHA, and arachidonic acid in RBCs. ANALYSIS Linear regression was used to detect significant relationships with cytokines and n-3 PUFAs, adiposity, and glucose-related variables. RESULTS The DHA concentration in RBC membranes was inversely associated with IL-6 (β = -0.0066; P < 0.001); EPA was inversely associated with TNFα (β = -0.4925; P < 0.001); and the NIR was inversely associated with Monocyte chemoattractant protein-1 (MCP-1) (β = -0.8345; P < 0.001) and IL-10 (β = -1.2868; P < 0.001). CONCLUSIONS Habitual intake of marine mammals and fish rich in n-3 PUFAs in this study population of Yup'ik Alaska Native adults is associated with reduced systemic inflammation, which may contribute to the low prevalence of diseases in which inflammation plays an important role.
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Affiliation(s)
- Bert B Boyer
- Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, OR, USA
| | - Scarlett E Hopkins
- Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, OR, USA
| | - Howard W Wiener
- Department of Statistics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jonathan Q Purnell
- Department of Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Diane M O'Brien
- Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - Cindy X Zhang
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Joseph E Aslan
- Department of Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Theresa Aliwarga
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Jeremy J Pomeroy
- Clinical Research Center, Marshfield Clinic, Marshfield, WI, USA
| | - Kenneth E Thummel
- Department of Pharmaceutics, University of Washington, Seattle, WA, USA
| | - Hemant K Tiwari
- Department of Statistics, University of Alabama at Birmingham, Birmingham, AL, USA
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Hill C, Nash SH, Bersamin A, Hopkins SE, Boyer BB, O’Brien DM, Chi DL. Seasonal variation in added sugar or sugar sweetened beverage intake in Alaska native communities: an exploratory study. Int J Circumpolar Health 2021; 80:1920779. [PMID: 33910491 PMCID: PMC8843354 DOI: 10.1080/22423982.2021.1920779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 03/01/2021] [Accepted: 03/15/2021] [Indexed: 10/24/2022] Open
Abstract
Excess added sugar intake contributes to tooth decay risk in Alaska Native communities. The goal of this exploratory study was to determine if there is seasonal variation in total added sugar intake or in the leading sources of added sugars in a Yup'ik population. Data were collected in spring and winter from 2008-2010 using self-reported intake data measured by 24-hour recall and by hair biomarker (carbon and nitrogen stable isotope). Seventy Yup'ik participants ages 14-70 years were recruited from two communities and data were collected twice from a subset of 38 participants. Self-reported added sugar intake (g/day), biomarker-predicted added sugar intake (g/day), and leading sources of added sugar were calculated. Seasonal variation was evaluated using a paired sample t-test. Total added sugar intake was 93.6 g/day and did not significantly differ by season. Sodas and other sugar-sweetened beverages (e.g. Tang, Kool-Aid) were the leading sources and added sugar from these sources did not significantly differ by season (p=.54 and p=.89, respectively). No seasonal variation in added sugar intake was detected by either self-report or biomarker. Dietary interventions that reduce intake of added sugars have the potential to reduce tooth decay in Yup'ik communities.
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Affiliation(s)
- Courtney Hill
- Department of Oral Health Sciences, University of Washington, Seattle, WA, USA
| | - Sarah H. Nash
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
| | - Andrea Bersamin
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
| | - Scarlett E. Hopkins
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
- Department of Obstetrics and Gynecology, Oregon Health and Science University, Portland, OR, USA
| | - Bert B. Boyer
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
- Department of Obstetrics and Gynecology, Oregon Health and Science University, Portland, OR, USA
| | - Diane M. O’Brien
- Center for Alaska Native Health Research, Institute for Arctic Biology, University of Alaska, Fairbanks, AK, USA
| | - Donald L. Chi
- Department of Oral Health Sciences, University of Washington, Seattle, WA, USA
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Hill CM, Paschall MJ, O'Brien DM, Bersamin A. Characterizing Vegetable and Fruit Intake in a Remote Alaska Native Community Using Reflection Spectroscopy and 24-Hour Recalls. JOURNAL OF NUTRITION EDUCATION AND BEHAVIOR 2021; 53:712-718. [PMID: 33715972 PMCID: PMC8783602 DOI: 10.1016/j.jneb.2021.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 02/01/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
OBJECTIVE Characterize vegetable and fruit (VF) intake in a Yup'ik community using self-reported intake and skin carotenoid status (SCS) and evaluate the relationship between SCS and fish intake. METHODS Self-reported VF intake was measured using the 24-hour recall, SCS was measured by reflection spectroscopy via the Veggie Meter (Longevity Link Corporation), and fish intake was estimated by the nitrogen isotope ratio (NIR) for 80 participants in a remote community in Southwestern Alaska. Bivariate correlations were used to assess the relationship between self-reported VF intake, SCS, and NIR. RESULTS Intake of all VF subgroups was low. The SCS was higher for males (262.7 vs 185.3; P = 0.002) and participants consuming more than 1 VF serving (232.5 vs 183.0; P = 0.02). It was not associated with the NIR. CONCLUSIONS AND IMPLICATIONS Increasing VF intake is a way to improve diet in Yup'ik communities and the Veggie Meter is a simple and noninvasive tool to facilitate surveillance efforts.
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Affiliation(s)
- Courtney M Hill
- Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK
| | - Mallie J Paschall
- Prevention Research Center, Pacific Institute for Research and Evaluation, Berkeley, CA
| | - Diane M O'Brien
- Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK; Center for Alaska Native Health Research, Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK
| | - Andrea Bersamin
- Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK; Center for Alaska Native Health Research, Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK.
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Bataille CP, Chartrand MMG, Raposo F, St-Jean G. Assessing geographic controls of hair isotopic variability in human populations: A case-study in Canada. PLoS One 2020; 15:e0237105. [PMID: 32776947 PMCID: PMC7416927 DOI: 10.1371/journal.pone.0237105] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 07/20/2020] [Indexed: 12/24/2022] Open
Abstract
Studying the isotope variability in fast-growing human tissues (e.g., hair, nails) is a powerful tool to investigate human nutrition. However, interpreting the controls of this isotopic variability at the population scale is often challenging as multiple factors can superimpose on the isotopic signals of a current population. Here, we analyse carbon, nitrogen, and sulphur isotopes in hair from 590 Canadian resident volunteers along with demographics, dietary and geographic information about each participant. We use a series of machine-learning regressions to demonstrate that the isotopic values in Canadian residents' hair are not only influenced by dietary choices but by geographic controls. First, we show that isotopic values in Canadian residents' hair have a limited range of variability consistent with the homogenization of Canadian dietary habits (as in other industrialized countries). As expected, some of the isotopic variability within the population correlates with recorded individual dietary choices. More interestingly, some regional spatial patterns emerge from carbon and sulphur isotope variations. The high carbon isotope composition of the hair of eastern Canadians relative to that of western Canadians correlates with the dominance of corn in the eastern Canadian food-industry. The gradient of sulphur isotope composition in Canadian hair from coast to inland regions correlates with the increasing soil pH and decreasing deposition of marine-derived sulphate aerosols in local food systems. We conclude that part of the isotopic variability found in the hair of Canadian residents reflects the isotopic signature associated with specific environmental conditions and agricultural practices of regional food systems transmitted to humans through the high consumption rate of intra-provincial food in Canada. Our study also underscores the strong potential of sulphur isotopes as tracers of human and food provenance.
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Affiliation(s)
- Clement P. Bataille
- Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Francis Raposo
- Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Gilles St-Jean
- Department of Earth and Environmental Sciences, University of Ottawa, Ottawa, Ontario, Canada
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