健康与营养科学团队出版物

Bordenave, N., Kock, L. B., Abernathy, M., Parcon, J. C., . . . Kasturi, P. (2015). Toward a more standardised and accurate evaluation of glycemic response to foods: Recommendations for portion size calculation. Food Chemistry, 167, 229-235. doi:10.1016/j.foodchem.2014.06.124

Abstract:

This study aimed at evaluating the adequacy of calculation methods for portions to be provided to subjects in clinical trials evaluating glycemic response to foods. Portion sizes were calculated for 140 food samples, based on Nutrition Facts labels (current practice) and actual available carbohydrate content (current recommendation), and compared against the amount of monosaccharides yielded by the digestive breakdown of their actual available carbohydrate content (basis for glycemic response to food). The current practice can result in significant under- or over-feeding of carbohydrates in 10% of tested cases, as compared to the targeted reference dosage. The method currently recommended can result in significantly inadequate yields of monosaccharides in 24% of tested cases. The current and recommended calculation methods do not seem adequate for a standardised evaluation of glycemic response to foods. It is thus recommended to account for the amount of absorbable monosaccharides of foods for portion size calculation.

Lee, S. G., Yang, M., Wang, Y., Vance, T., . . . Chun, O. K. (2014). Impact of orange juice consumption on bone health of the U.S. population in the National Health and Nutrition Examination Survey 2003-2006. Journal of Medicinal Food, 17(10), 1142–1150. doi:10.1089/jmf.2013.0072

Abstract:

Orange juice (OJ) fortified with calcium (Ca) and vitamin D has turned OJ into a readily available source of these nutrients for children and adults. However, the impact of OJ consumption on Ca and vitamin D adequacy and bone health has not been documented. The aim of this study was the evaluation of the contribution of 100% OJ consumption to dietary and serum Ca and vitamin D status, and bone health parameters in the U.S. population aged 4 years and older (n=13,971) using the National Health and Nutrition Examination Survey (NHANES) 2003–2004 and 2005–2006. Food consumption data were coded to produce micronutrient intake values using the USDA Food and Nutrient Database for Dietary Studies 3.0. Serum concentrations of bone-related micronutrients and biomarkers, bone mineral density (BMD), and bone mineral content (BMC) were measured. Analysis of data was conducted using SAS software 9.2 and SUDAAN. OJ consumers showed higher intakes of bone-related micronutrients, compared with nonconsumers (P<.05). In addition, OJ consumers had higher serum Ca levels in adults (P<.01) and had a lower odds ratio for serum 25-hydroxyvitamin D3 <20 ng/mL in children (P<.05). OJ consumption was positively associated with femur BMD in children (P<.05) and with femur BMC in both children and adults (P<.05). In conclusion, OJ may be recommended as an effective dietary means of improving the status of Ca and vitamin D, acid-base balance, and of promoting bone health in children and adults.

Yang, J., Ou, B., Wise, M. L., & Chu, Y. (2014). In vitro total antioxidant capacity and anti-inflammatory activity of three common oat-derived avenanthramides. Food Chemistry, 160, 338-345. doi:10.1016/j.foodchem.2014.03.059

Abstract:

To better understand mechanisms underlying the health benefits of oats, the free radical scavenging capacities of oat avenanthramides 2c, 2f, and 2p and their ability to inhibit NF-κB activation were evaluated. The antioxidant capacities of 2c, 2f, and 2p against peroxyl radicals, hydroxyl radicals, superoxide anion, singlet oxygen, and peroxynitrite were determined by using ORAC, HORAC, SORAC, SOAC, and NORAC assays, respectively. The total antioxidant capacity of 2c was approximately 1.5-fold those of 2f and 2p. Total antioxidant capacity was primarily attributable to SORAC and ORAC for 2c (>77%, p < 0.05), and to ORAC and SOAC for 2f. ORAC accounted for approximately 32% of total antioxidant capacity in 2p. EC₅₀ values for inhibiting TNF-α-induced NF-κB activation in C2C12 cells were 64.3, 29.3, and 9.10 μM for 2c, 2f, and 2p, respectively. Differences in antioxidant capacities and ability to inhibit NF-κB among the avenanthramides could be ascribed to structural variations.

Zheng, J., Greenway, F. L., Heymsfield, S. B., Johnson, W. D., . . . Finley, J. W. (2014). Effects of three intense sweeteners on fat storage in the C. elegans model. Chemico-Biological Interactions, 215, 1-6. doi:10.1016/j.cbi.2014.02.016

Abstract:

Beverages sweetened with caloric sweeteners (CS), glucose, sucrose or high-fructose corn syrup, are associated with weight gain. Beverages sweetened with intense sweeteners (IS) are marketed as low-calorie substitutes to prevent beverages-associated weight gain. Using Caenorhabditis elegans, the effects on intestinal fat deposition (IFD) and pharyngeal pumping rate (PPR) of cola beverages sweetened with glucose, aspartame, or aspartame plus acesulfame-potassium (AceK) were compared. Control groups received Escherichia coli (OP50) only. Study I: the nematodes received additional glucose- or IS-sweetened beverages. Study II: the nematodes received additional glucose, aspartame, or aspartame plus AceK (AAK). Beverages containing CS or IS (aspartame or AAK) did not alter IFD in wild type (N2) or in daf-16 deficiency. The CS cola increased IFD in sir-2.1 deficiency (P<0.05). The AAK-cola increased IFD in daf-16/daf-2 deficiency and sir-2.1 deficiency (P<0.05). Glucose increased IFD in N2 and daf-16 deficiency (P<0.05). Aspartame showed a tendency towards reduced IFD in N2 and decreased IFD in daf-16/daf-2 deficiency (P<0.05). AAK increased IFD in daf-16 deficiency and sir-2.1 deficiency (P<0.05), and reversed the aspartame-induced reduction in IFD. The aspartame-sweetened cola increased the PPR in daf-16/daf-2 deficiency and daf-16 deficiency (P<0.05); similar results were obtained in N2 with both IS (P<0.05). AAK increased the PPR in daf-16/daf-2, daf-16, and sir-2.1 deficiencies (P<0.05). Thus, IS increased the PPR, a surrogate marker of lifespan. Aspartame may have an independent effect in reducing IFD to assist humans desiring weight loss. AceK may increase IFD in presence of insulin resistance.

Trinidad, T. P., Kurilich, A. C., Mallillin, A. C., Walcyzk, T., . . . Fletcher, J. (2014). Iron absorption from NaFeEDTA-fortified oat beverages with or without added vitamin C. International Journal of Food Sciences and Nutrition, 65(1), 124-128. doi:10.3109/09637486.2013.8367

Abstract:

Background: Food fortification is the best long-term approach for reducing the incidence of iron deficiency. Objective: To determine iron absorption from NaFeEDTA-fortified oat beverages without and with vitamin C. Materials and methods: Iron absorption in 19 apparently healthy 6-year-old children was studied. Two oat beverages fortified with iron (labeled with stable isotopes of NaFeEDTA), zinc, and vitamin A, without and with vitamin C was consumed in two consecutive days in random order. Blood samples were taken 14 days later for stable isotope measurements. Results: The mean fractional iron absorption from the fortified oat beverage without vitamin C (5.65 ± 0.54%) was significantly lower than that from the beverage with vitamin C (7.14 ± 0.90%; p < 0.05). Conclusion: Fortified oat beverages may offer a convenient and effective mechanism to improve the iron status of children. The addition of vitamin C improved iron absorption by an additional 1.5%.

Lamport, D. J., Saunders, C., Butler, L. T., & Spencer, J. P. (2014). Fruits, vegetables, 100% juices, and cognitive function. Nutrition Reviews, 72(12), 774-789. doi:10.1111/nure.12149

Abstract:

Although reviews of the association between polyphenol intake and cognition exist, research examining the cognitive effects of fruit, vegetable, and juice consumption across epidemiological and intervention studies has not been previously examined. For the present review, critical inclusion criteria were human participants, a measure of fruit, vegetable, or 100% juice consumption, an objective measure of cognitive function, and a clinical diagnosis of neuropsychological disease. Studies were excluded if consumption of fruits, vegetables, or juice was not assessed in isolation from other food groups, or if there was no statistical control for education or IQ. Seventeen of 19 epidemiological studies and 3 of 6 intervention studies reported significant benefits of fruit, vegetable, or juice consumption for cognitive performance. The data suggest that chronic consumption of fruits, vegetables, and juices is beneficial for cognition in healthy older adults. The limited data from acute interventions indicate that consumption of fruit juices can have immediate benefits for memory function in adults with mild cognitive impairment; however, as of yet, acute benefits have not been observed in healthy adults. Conclusions regarding an optimum dietary intake for fruits, vegetables, and juices are difficult to quantify because of substantial heterogeneity in the categorization of consumption of these foods.

Clemens, R., & Van Klinken, B. J. (2014). The future of oats in the food and health continuum. British Journal of Nutrition, 112, S75-S79. doi:10.1017/S0007114514002724

Abstract:

A large body of clinical evidence suggests that the consumption of 3 g or more per d of β-glucan from oats or barley, as part of a diet low in saturated fat and cholesterol, may reduce the risk of CHD. The unique chemical and physical properties of oats and physiological responses to oat consumption contribute to their demonstrated health benefits; other health attributes are still under evaluation. Many of these benefits, such as those associated with a reduced risk of CVD, are codified in health claims by several regulatory agencies, such as the Food and Drug Administration in the USA and the European Food Safety Authority in Europe. Despite these oat–health relationships, an apparent decline in agricultural production, the presence of an array of plant pathogens, and dynamics of climatic conditions may preclude the availability and subsequent consumption of this commodity worldwide. Therefore, it is incumbent on scientists from multiple disciplines to advance research in a spectrum of arenas, including physico-chemical properties of oats, the impact of oats on an array of non-communicable diseases and human microbiome, agricultural practices and environments, and processing technologies that contribute to global food policies.

Clemens, R., & Van Klinken, B. J. (2014). Oats, more than just a whole grain: An introduction. British Journal of Nutrition, 112, S1-S3. doi:10.1017/S0007114514002712

Abstract:

In May 2012, an oats workshop was held in New York to convene a group of international experts to discuss the implications and applications of oats relative to human health. These diverse experts represented disciplines including, but not limited to, epidemiology, food regulation, nutrition and food science, grain breeding and plant genetics, food processing, medicine and public-health policy. This ensuing series addresses three important aspects pertinent to oats: a brief overview of the dynamics of oats; the spectrum of established and emerging research in agriculture and health; and the options and opportunities for future applications of oats that extend beyond dietary fibre. Oats have many unique chemical properties, potential health benefits, agricultural challenges and nutrition-policy opportunities – but global production of oats appears to be falling. This is occurring despite contemporary research in the development of drought and infestation resistance and climate-adaptive cultivars and assessments of oats’ unique components (such as dietary fibre, lipids, β-glucan and avenanthramides) that may contribute to health benefits. This suggests that oats represent a promising grain in the whole-grains landscape. New insights have been created into benefits beyond cardiovascular health. Modern milling and processing technologies have been developed to retain the nutritive value and functional properties of oats and to assure a consistent foundation for global health policies.

de Jager, C. A., Dye, L., de Bruin, E. A., Butler, L., . . . Wesnes, K. (2014). Criteria for validation and selection of cognitive tests for investigating the effects of foods and nutrients. Nutrition Reviews, 72(3), 162-179. doi:10.1111/nure.12094

Abstract:

This review is an output of the International Life Sciences Institute (ILSI) Europe Marker Initiative, which aims to identify evidence-based criteria for selecting adequate measures of nutrient effects on health through comprehensive literature review. Experts in cognitive and nutrition sciences examined the applicability of these proposed criteria to the field of cognition with respect to the various cognitive domains usually assessed to reflect brain or neurological function. This review covers cognitive domains important in the assessment of neuronal integrity and function, commonly used tests and their state of validation, and the application of the measures to studies of nutrition and nutritional intervention trials. The aim is to identify domain-specific cognitive tests that are sensitive to nutrient interventions and from which guidance can be provided to aid the application of selection criteria for choosing the most suitable tests for proposed nutritional intervention studies using cognitive outcomes. The material in this review serves as a background and guidance document for nutritionists, neuropsychologists, psychiatrists, and neurologists interested in assessing mental health in terms of cognitive test performance and for scientists intending to test the effects of food or food components on cognitive function.

Rebello, C. J., Chu, Y. F., Johnson, W. D., Martin, C. K., . . . Greenway, F. L. (2014). The role of meal viscosity and oat β-glucan characteristics in human appetite control: A randomized crossover trial. Nutrition Journal, 13, 49. doi:10.1186/1475-2891-13-49

Abstract:

Background Foods that enhance satiety can help consumers to resist environmental cues to eat, and improve the nutritional quality of their diets. Viscosity generated by oat β-glucan, influences gastrointestinal mechanisms that mediate satiety. Differences in the source, processing treatments, and interactions with other constituents in the food matrix affect the amount, solubility, molecular weight, and structure of the β-glucan in products, which in turn influences the viscosity. This study examined the effect of two types of oatmeal and an oat-based ready-to-eat breakfast cereal (RTEC) on appetite, and assessed differences in meal viscosity and β-glucan characteristics among the cereals. Methods Forty-eight individuals were enrolled in a randomized crossover trial. Subjects consumed isocaloric breakfast meals containing instant oatmeal (IO), old-fashioned oatmeal (SO) or RTEC in random order at least a week apart. Each breakfast meal contained 218 kcal (150 kcal cereal, and 68 kcal milk) Visual analogue scales measuring appetite were completed before breakfast, and over four hours, following the meal. Starch digestion kinetics, meal viscosities, and β-glucan characteristics for each meal were determined. Appetite responses were analyzed by area under the curve. Mixed models were used to analyze response changes over time. Results IO increased fullness (p = 0.04), suppressed desire to eat (p = 0.01) and reduced prospective intake (p < 0.01) more than the RTEC over four hours, and consistently at the 60 minute time-point. SO reduced prospective intake (p = 0.04) more than the RTEC. Hunger scores were not significantly different except that IO reduced hunger more than the RTEC at the 60 minute time-point. IO and SO had higher β-glucan content, molecular weight, gastric viscosity, and larger hydration spheres than the RTEC, and IO had greater viscosity after oral and initial gastric digestion (initial viscosity) than the RTEC. Conclusion IO and SO improved appetite control over four hours compared to RTEC. Initial viscosity of oatmeal may be especially important for reducing appetite.

Koenig, R., Dickman, J. R., Kang, C., Zhang, T., . . . Ji, L. L. (2014). Avenanthramide supplementation attenuates exercise-induced inflammation in postmenopausal women. Nutrition Journal, 13, 21. doi:10.1186/1475-2891-13-21

Abstract:

During aging, chronic systemic inflammation increases in prevalence and antioxidant balance shifts in favor of oxidant generation. Avenanthramide (AVA) is a group of oat phenolics that have shown anti-inflammatory and antioxidant capability. The present study investigated whether dietary supplementation of avenanthramides (AVA) in oats would increase antioxidant protection and reduce inflammation after a bout of downhill walking (DW) in postmenopausal women. Women at age of 50–80 years (N = 16) were randomly divided into two groups in a double-blinded fashion, receiving two cookies made of oat flour providing 9.2 mg AVA or 0.4 mg AVA (control, C) each day for 8 weeks. Before and after the dietary regimen, each group of subjects walked downhill on a treadmill (−9% grade) for 4 bouts of 15 minutes at a speed of 4.0 km/h with 5 minutes rest between sessions. Blood samples were collected at rest, 24 h post-DW, and 48 h post-DW pre- and post-supplementation. Both DW sessions increased plasma creatine kinase activity (P < 0.05). Before supplementation, in vitro neutrophil respiratory burst (NRB) activity was increased at 24 h post-DW (P < 0.05) and C-reactive protein (CRP) was increased 48 h post-DW (P < 0.05). AVA supplementation decreased DW-induced NRB at 24 h (P < 0.05) and CRP level 48 h (P < 0.05). Plasma interleukin (IL)-1β concentration and mononuclear cell nuclear factor (NF) κB binding were suppressed at rest and during post-DW period in AVA but not C group (P < 0.05). Plasma total antioxidant capacity (P < 0.05) and erythrocyte superoxide dismutase activity were increased in AVA vs. C (P < 0.05), whereas glutathione redox status was elevated 48 h post-DW but not affected by AVA. Thus, chronic AVA supplementation decreased systemic and DW-induced inflammation and increased blood-borne antioxidant defense in postmenopausal women.

Shi, Y., Johnson, J., O'Shea, M., & Chu, Y. F. (2014). The bioavailability and metabolism of phenolics, a class of antioxidants found in grains. Cereal Foods World, 59(2), 52-58. doi:10.1094/CFW-59-2-0052

Abstract:

Consumption of whole grains has been shown to reduce the risk of chronic diseases. Whole grains contain a variety of bioactive compounds with antioxidant properties that can help prevent disease by inhibiting oxidative damage. The health benefits of whole grains depend not only on the functions of the bioactive compounds they contain, but also on the quantities of those compounds consumed, their metabolism, their bioavailability in different tissues, and the functions of their metabolites in the body. This article provides an overview of grain antioxidants, including their metabolism and bioavailability, with a focus on the phenolics ferulic acid, alk(en)ylresorcinols, and avenanthramides. Ferulic acid is the most abundant form of phenolic acid found in cereal grains; alk(en)ylresorcinols are found in large quantities in rye and wheat; and avenanthramides are found only in oats. Results from in vitro, in vivo, and human studies indicate that all three phenolic compounds have potent antioxidant properties

Chu, Y. F., Wise, M. L., Gulvady, A. A., Chang, T., . . . O'Shea, M. (2013). In vitro antioxidant capacity and anti-inflammatory activity of seven common oats. Food Chemistry, 139(1-4), 426-431. doi:10.1016/j.foodchem.2013.01.104

Abstract:

Oats are gaining increasing scientific and public interest for their purported antioxidant-associated health benefits. Most reported studies focused on specific oat extracts or particular oat components, such as β-glucans, tocols (vitamin E), or avenanthramides. Studies on whole oats with respect to antioxidant and anti-inflammatory activities are still lacking. Here the antioxidant and anti-inflammatory activities from whole oat groats of seven common varieties were evaluated. All oat varieties had very similar oxygen radical absorption capacity compared with other whole grains. In an anti-inflammatory assay, oat variety CDC Dancer inhibited tumor necrosis factor-α induced nuclear factor-kappa B activation by 27.5% at 2 mg/ml, whereas variety Deiter showed 13.7% inhibition at a comparable dose. Avenanthramide levels did not correlate with the observed antioxidant and anti-inflammatory activities. Further investigations are needed to pinpoint the specific antioxidant and anti-inflammatory compounds, and potential synergistic and/or matrix effects that may help explain the mechanisms of oat’s anti-inflammatory actions.

McKeown, N. M., Jacques, P. F., Seal, C. J., de Vries, J., . . . Marquart, L. F.  (2013). Whole grains and health: From theory to practice-highlights of The Grains for Health Foundations Whole Grains Summit 2012. The Journal of Nutrition, 143(5), 744S-758S. doi:10.3945/jn.112.172536

Abstract:

The Grains for Health Foundations Whole Grains Summit, held May 19–22, 2012 in Minneapolis, was the first meeting of its kind to convene >300 scientists, educators, food technologists, grain breeders, food manufacturers, marketers, health professionals, and regulators from around the world. Its goals were to identify potential avenues for collaborative efforts and formulate new approaches to whole-grains research and health communications that support global public health and business. This paper summarizes some of the challenges and opportunities that researchers and nutrition educators face in expanding the knowledge base on whole grains and health and in translating and disseminating that knowledge to consumers. The consensus of the summit was that effective, long-term, public-private partnerships are needed to reach across the globe and galvanize the whole-grains community to collaborate effectively in translating whole-grains science into strategies that increase the availability and affordability of more healthful, grain-based food products. A prerequisite of that is the need to build trust among diverse multidisciplinary professionals involved in the growing, producing, marketing, and regulating of whole-grain products and between the grain and public health communities.

Zachwieja, J., Hentges, E., Hill, J. O., Black, R., & Vassileva, M. (2013). Public-private partnerships: The evolving role of industry funding in nutrition research. Advances in Nutrition, 4(5), 570-572. doi:10.3945/an.113.004382

Abstract:

The global burdens of morbidity and mortality associated with obesity-related chronic diseases are crippling public health and are predicted to exponentially increase over the next 3 decades. Meanwhile, the resources necessary to conduct research that may offer solutions to the obesity epidemic continue to decline and funding has become increasingly difficult to secure. Alternative models for funding nutrition and health research are necessary to make considerable and timely progress to improve public health. Key stakeholders include, but are not limited to, government agencies, foundations, private industry, and nongovernmental organizations.

Rebello, C. J., Johnson, W. D., Martin, C. K., Xie, W., . . . Greenway, F. L. (2013). Acute effect of oatmeal on subjective measures of appetite and satiety compared to a ready-to-eat breakfast cereal: A randomized crossover trial. Journal of the American College of Nutrition, 32(4), 272-279. doi:10.1080/07315724.2013.816614

Abstract:

Objective: The physicochemical properties of soluble oat fiber (β-glucan) affect viscosity-dependent mechanisms that influence satiety. The objective of this study was to compare the satiety impact of oatmeal with the most widely sold ready-to-eat breakfast cereal (RTEC) when either was consumed as a breakfast meal. Methods: Forty-eight healthy individuals ≥18 years of age were enrolled in a randomized crossover trial. Following an overnight fast, subjects consumed either oatmeal or RTEC in random order at least a week apart. The breakfasts were isocaloric and contained 363 kcal (250 kcal cereal, 113 kcal milk). Visual analogue scales measuring appetite and satiety were completed before breakfast and throughout the morning. The content and physicochemical properties of oat β-glucan were determined. Appetite and satiety responses were analyzed by area under the curve (AUC). Physicochemical properties were analyzed using t tests. Results: Oatmeal, higher in fiber and protein but lower in sugar than the RTEC, resulted in greater increase in fullness (AUC: p = 0.005 [120 minute: p = 0.0408, 180 minute: p = 0.0061, 240 minute: p = 0.0102]) and greater reduction in hunger (AUC: p = 0.0009 [120 minute: p = 0.0197, 180 minute: p = 0.0003, 240 minute: p = 0.0036]), desire to eat (AUC: p = 0.0002 [120 minute: p = 0.0168, 180 minute: p < 0.0001, 240 minute: p = 0.0022]), and prospective intake (AUC: p = 0.0012 [120 minute: p = 0.0058, 180 minute: p = 0.006, 240 minute: p = 0.0047]) compared to the RTEC. Oatmeal had higher β-glucan content, higher molecular weight (p < 0.0001), higher viscosity (p = 0.025), and larger hydration spheres (p = 0.0012) than the RTEC. Conclusion: Oatmeal improves appetite control and increases satiety. The effects may be attributed to the viscosity and hydration properties of its β-glucan content.

Yang, M., Lee, S. G., Wang, Y., Lloyd, B., . . . Chun, O. K. (2013). Orange juice, a marker of diet quality, contributes to essential micronutrient and antioxidant intakes in the United States population. Journal of Nutrition Education and Behavior, 45(4), 340–348. doi:10.1016/j.jneb.2012.07.005

Abstract:

Objective To evaluate the impact of 100% orange juice (OJ) on the healthy diet and micronutrient intakes of the United States population. Methods Cross-sectional study of 13,971 people in the United States aged ≥ 4 years using 2 24-hour diet recalls from the National Health and Nutrition Examination Survey, 2003-2006. Results Consumption of OJ was higher among 4- to 8-year-old children, older adults (> 50 y old), non-Hispanic blacks, those with lower body mass index, those of lower income level, nonsmokers, dietary supplement users, and those participating in regular exercise (P < .05). Consumption of OJ was positively associated with the percentage of participants meeting MyPyramid recommendations for fruit consumption. Increased OJ consumption was correlated with increased daily intakes of certain micronutrients and antioxidants (P < .05). Percentages of participants with intakes below Estimated Average Requirements for these micronutrients decreased with increased OJ consumption (P < .001). Conclusions and Implications The implicated nutritional and potential health benefits of OJ warrant further investigation in clinical research studies.

Chu, Y. F. (2013). Oats nutrition and technology. Wiley-Blackwell, 1-453. doi:10.1002/9781118354100

Moore, S., & Lloyd, B. (2012). Improving the comparability of national estimates of fruit and vegetable consumption for cross-national studies of dietary patterns. Food and Nutrition Bulletin, 33(4), 312–317. doi:10.1177/156482651203300412

Abstract:

Background Developing global approaches to the problem of low fruit and vegetable consumption requires cross-nationally comparable estimates of fruit and vegetable consumption. National differences in the definitions of fruits and vegetables and serving size amounts limit the comparability of estimates. Objectives To describe national differences in fruit and vegetable definitions, serving size amounts, and how these factors can influence the comparability of fruit and vegetable consumption estimates; and to provide a series of reporting recommendations that could facilitate cross-national studies of fruit and vegetable consumption. Methods A comprehensive review of national dietary guidelines, fruit and vegetable definitions, and fruit and vegetable consumption recommendations was undertaken for Canada, the United States, and the United Kingdom. Results To improve cross-national comparability, the findings suggest that researchers could report fruit and vegetable consumption separately, provide separate average fruit and vegetable intake amounts, report potato and legume or pulse consumption separately from vegetable consumption, and report consumption of 100% fruit juice separately from fruit consumption. Conclusions These four low-cost, high-value additions to conventional research reporting standards will aid in the development of cross-national research on global fruit and vegetable consumption and the design of global policies that can target low fruit and vegetable consumption in populations.

Wang, Y., Lloyd, B., Yang, M., Davis, C. G., . . . Chun, O. K. (2012). Impact of orange juice consumption on macronutrient and energy intakes and body composition in the US population. Public Health Nutrition, 15(12), 2220–2227. doi:10.1017/S1368980012000742

Abstract:

Objective The present study evaluated the contribution of 100 % orange juice (OJ) consumption to the intakes of macronutrients and energy and its impact on body composition. Design A cross-sectional study was conducted. The main exposure was OJ consumption based on two non-consecutive 24 h diet recalls. Macronutrient and energy intakes and body composition parameters were outcome measures. All statistical analyses were carried out using SAS and SUDAAN statistical software packages to allow for multistage sample designs. Setting The US population and its subgroups. Subjects The US population aged ≥4 years (n 13 971) from the National Health and Nutrition Examination Survey 2003–2006, conducted by the National Center for Health Statistics. Results In this US population, OJ consumers had lower BMI and healthier lifestyle behaviours (including lower alcohol consumption and smoking as well as higher exercise level) than non-consumers (P < 0·05). After adjusting for covariates, OJ consumers had higher daily intakes of carbohydrate, total sugar, total fat and energy than non-consumers (P < 0·01). However, these linear trends still remained even after OJ was removed from the food list of items consumed. Adult OJ consumers had lower BMI, waist circumference and percentage body fat than non-consumers (P < 0·01), as well as lower odds ratio for overweight and obesity (P < 0·01). These effects were not seen in children and adolescents, where there was no significant difference in BMI, waist circumference and percentage body fat in OJ consumers compared with non-consumers. Conclusions OJ consumption was associated with healthier body composition in adults; while there were no significant associations between OJ consumption and body composition in children and adolescents.