Proceedings of the Nutrition Society最新文献

{"title":"Modelling the replacement of red and processed meat with plant-based alternatives and the estimated effect on insulin sensitivity in a cohort of Australian adults","authors":"J.P. Goode, K.J. Smith, M. Breslin, M. Kilpatrick, T. Dwyer, A.J. Venn, C.G. Magnussen","doi":"10.1017/s0029665124000247","DOIUrl":"https://doi.org/10.1017/s0029665124000247","url":null,"abstract":"<p>Dietary guidelines are increasingly promoting plant-based diets, limits on red meat consumption, and plant-based sources of protein for health and environmental reasons<span>(1)</span>. It is unclear how the resulting food substitutions associate with insulin resistance, a risk factor for type 2 diabetes. Here, we modelled the replacement of red and processed meat with plant-based alternatives and the estimated effect on insulin sensitivity. We included 783 participants (55% female) from the Childhood Determinants of Adult Health (CDAH) study, a population-based cohort of Australians. In adulthood, diet was assessed at three time points using food frequency questionnaires: CDAH-1 (2004–06), CDAH-2 (2009–11), and CDAH-3 (2017–19). The median follow-up duration was 13 years. The cumulative average intake of each food group was calculated to reflect habitual consumption. Insulin sensitivity (%) was estimated from fasting glucose and insulin concentrations at CDAH-3 (aged 39–49 years) using homeostasis model assessment. Applying the partition model<span>(2)</span>, we simulated the replacement of one food group with another by including both in the model simultaneously (e.g., red meat and legumes), along with potential confounders and energy intake. The difference between parameter estimates (i.e., regression coefficients and variances) and their covariance were used to estimate the “substitution” effect. We report the simulated percentage point change in log-transformed insulin sensitivity for a 1 serve/day lower intake of one food group with a 1 serve/day higher intake of another food group. Replacing red meat with a combination of plant-based alternatives was associated with higher insulin sensitivity (<span>β</span> = 0·10, 95% CI 0·04–0·16). Adjustment for waist circumference attenuated this association by 61·4%. On an individual basis, replacing red meat with legumes (<span>β</span> = 0·12, 95% CI 0·02–0·21), nuts and seeds (<span>β</span> = 0·15, 95% CI 0·06–0·23), or whole grains (<span>β</span> = 0·11, 95% CI 0·04–0·17) was likewise associated with higher insulin sensitivity. Point estimates were similar when replacing processed meat with plant-based alternatives, but more uncertain due to wide confidence intervals. Our modelling suggests that habitually replacing red meat, and possibly processed meat, with plant-based alternatives may associate with higher insulin sensitivity, and thus, a lower risk of type 2 diabetes. Abdominal adiposity was identified as a potentially important mediator in this relationship. In relation to insulin sensitivity, our findings support the recommendation to choose plant-based sources of protein at the expense of red meat consumption.</p>","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"63 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feeding our Future: school food and local agriculture in the Pacific","authors":"S. Burkhart","doi":"10.1017/s0029665124000260","DOIUrl":"https://doi.org/10.1017/s0029665124000260","url":null,"abstract":"<p>Utilising local and traditional foods in schools presents a significant opportunity within our region to ensure food and nutritional security, support local livelihoods by driving markets and employment opportunities, increasing food literacy, and help students to understand the role of, and develop a preference for these foods. School meals programs (SMP) are increasingly touted as a strategy for food system transformation<span>(1)</span>, however, are not widely used in the Pacific Islands<span>(2)</span>. Yet, there is increasing interest and momentum towards understanding school food and nutrition environments and the use of SMP in this region, especially with models that support and promote the integration of local, traditional climate-resilient, nutrient rich foods. When a large scale SMP may not be possible, other school food and nutrition activities can be utilised to support nutritious food choice. Evidence collected over the last five years provides information on the current situation, activities, and capacity for providing food in schools across the Pacific Islands <span>(2,3,4)</span>. Activities across the region vary from national SMP to gardening programs, nutrition education, providing canteens/tuckshops and other ad hoc activities, for example events for World Food Day. Some activities have a requirement for the use of local food, while some prioritise local foods in gardening programs and work with local farmers. Recently it has been shown that youth are exposed to, and have access to significant amounts of ultra-processed foods (UPF) around schools<span>(3)</span>. Mapping of the foods available to students within a 400m radius of 88 schools in Fiji found that sugar sweetened beverages were available in 80%, and lollies/confectionary in just over 60% of outlets. Fresh fruit was available in just over 20% of outlets, while fresh vegetables were available in less than 20% of outlets<span>(3)</span>. While there are many challenges to providing local, traditional, nutritious foods in schools, including access to financial, human, and physical resources, stakeholders have told us that one of the most significant is how modernisation and colonisation of food systems have resulted in a preference for hyperpalatable UPF and how this makes it more challenging to incorporate local produce in a way that is accepted by students. This provides an opportunity to further explore and share ways to integrate local, traditional, climate-resilient, nutrient rich foods in schools to support children and adolescents to value, utilise, prefer, and advocate for these foods. There is a need to support the utilisation of traditional, local foods in schools by advocating for policy (at various levels, right from a school level upwards) that drives the use of these foods and creates more supportive school food environments.</p>","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"19 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dietary intake of adolescent rowers - analysis of energy intake","authors":"J. Speedy, K. Beck, S. Watts, C. Badenhorst","doi":"10.1017/s0029665124000612","DOIUrl":"https://doi.org/10.1017/s0029665124000612","url":null,"abstract":"<p>Adequate energy intake (EI) is essential for adolescent athletes to support health, performance, and growth<span>(1)</span>. Rowing is a physically demanding sport where intense training begins in adolescence. Research is needed to assess whether current EI is sufficient to support healthy physiological functions and training in adolescent rowers. The aim of this study was to evaluate the energy status (energy availability (EA) or energy balance (EB)) including EI and exercise energy expenditure (EEE) of adolescent rowers in New Zealand. A total of 35 rowers (23 females, 16.8yrs ± 1.9yrs; 12 males, 17.3yrs ± 1.6yrs) who had been rowing for at least one season participated. A bioimpedance analyser measured body composition in 11 participants (8 females, weight 63.0±7.0kg, fat free mass (FFM) 50.8 ± 6.5kg; 3 males, weight 78.5 ± 15.9kg, FFM 70.7 ± 12.2kg) enabling calculation of EA. Due to COVID-19 restrictions, the remaining 24 participants (15 females, 9 males) provided estimated body weight (74.7 ± 9.2kg) and EB was then used to evaluate energy status. All participants completed four days of food and training diaries, two ‘recovery’ and two ‘hard’ training days. EI was determined in FoodWorks10 software using the New Zealand Food Composition Database. For training, metabolic equivalent of tasks (MET)<span>(2)</span> were assigned using bodyweight, heart rate, and rating of perceived effort to estimate EEE. Paired sample t-tests or Wilcoxon Signed Rank test (non-parametric data) was used to determine differences between EI, EEE, EA, and EB on the high and low training days for each gender. Significance was set at p&lt; 0.05. The average EI for females on hard and recovery days was 10837 ± 3304kJ and 10461 ± 2882kJ respectively, and for males was 15293 ± 3971kJ and 13319 ± 4943kJ, respectively. No significant differences were found between EI on hard vs. recovery days in both genders. Significant differences between average EEE on hard vs. recovery days were found in both genders (females, hard day 4609 ± 2446kJ, recovery day 3146 ± 1905kJ, p&lt;0.001; males, hard day 6589 ± 1575kJ, recovery day 3326 ± 2890kJ, p = 0.001). EA on hard and recovery training days was classified as suboptimal at 142 ± 80kJ/FFMkg/day and 167 ± 79kJ/FFMkg/day respectively with no significant difference in EA between hard and recovery days (p = 0.092). Average EB on hard training days was −484 ± 4267kJ and on recovery training days was 572 ± 3265kJ, with no significant difference between training days (p = 0.177). Both genders showed no significant difference in EB between hard and recovery training days (females p = 0.221, males p = 0.978). The results suggest that adolescent rowers do not adjust their nutritional intake to match EEE. This may increase the risk of adolescent rowers presenting with suboptimal EB or EA, with females being at a greater risk than males.</p>","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"23 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An overview of labelling and environmental claims on fish and seafood products in New Zealand supermarkets","authors":"X. le Folcalvez, S. Skeaff, K.E. Bradbury","doi":"10.1017/s002966512400051x","DOIUrl":"https://doi.org/10.1017/s002966512400051x","url":null,"abstract":"&lt;p&gt;Fish and other seafood are a major component of New Zealanders’ diet; the 2018/2019 and 2019/2020 New Zealand Health Survey found that nearly three quarters of New Zealanders eat seafood at least once a week&lt;span&gt;(1)&lt;/span&gt;. Environmental and ethical factors influence New Zealand consumers’ purchase of seafood and consumers prefer to get their information about seafood at the point of purchase&lt;span&gt;(2)&lt;/span&gt;. However, environmental claims are not regulated under the Australia New Zealand Food Standards Code, unlike health and nutrition claims. Some seafood products are certified by programmes (e.g. Best Aquaculture Practice (BAP)), ensuring the seafood was sourced according to specific criteria related to environmental management, but other products carry self-declared environmental claims that have not been independently verified. This study aimed to describe labelling practices, including environmental claims, on fish and seafood packaged products sold in major New Zealand supermarkets and available in the 2022 Nutritrack database. Nutritrack is an annual survey conducted by trained fieldworkers who take photographs of all packaged food and beverage products displaying a nutrition information panel (NIP) from 4 major supermarkets in New Zealand. Information from the photographs, including the NIP and the ingredients list is entered into the Nutritrack database. For this study, data (including fish species, harvest location, processing country, fishing method, environmental certifications and self-declared environmental claims) were extracted from the archived photographs of all sides of the packaged fish and seafood products in the 2022 Nutritrack database. Self-declared environmental claims were assessed against the ISO 14021 standard for “Environmental labels and declarations — Self-declared environmental claims (Type II environmental labelling)” on specific criteria that were relevant for seafood products, including if the self-declared claim mentioned the word “sustainable” (as this term is difficult to substantiate and should be avoided); was vague and non-specific; or overstated the benefits (to imply multiple benefits from a single environmental change). There were 369 fish and seafood products included in this study. Eighty-eight products (23.8%) displayed a certification; the Marine Stewardship Council’s certification (MSC) for wild fish was the most common and was featured by 72 products (19.5%). One hundred and fifty-two products (41.2%) displayed at least one self-declared claim. Thirty-three distinct self-declared environmental claims were identified, 16 (48.5%) of which breached the ISO 14021 standard for environmental declarations because they used the term “sustainable” and 26 (78.8%) of which breached the ISO 14021 standard because they were vague. This analysis suggests that stricter regulation is needed for self-declared environmental claims on fish and other seafood products available for purchase in New Zealand, to prev","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"152 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140889852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The nutritional adequacy of popular weight loss diets - do they meet the requirements for dairy foods and calcium?","authors":"K.J. Murphy, A. O’Connor, E.L. Bracci","doi":"10.1017/s0029665124000594","DOIUrl":"https://doi.org/10.1017/s0029665124000594","url":null,"abstract":"<p>Weight loss or fad diets are often promoted for rapid weight loss and by unqualified individuals and celebrities. There is sometimes limited information around the nutritional adequacy of the diet. Some diets require fasting, some modify macronutrient composition, and some restrict food groups, such as dairy foods, resulting in suboptimal intake of nutrients like calcium, potentially leading to nutrient deficiencies and disease such as osteoporosis if followed long-term. We assessed the total dairy food and calcium content of five popular weight loss diets (Intermittent Fasting, Ketogenic, Optifast, Paleolithic, 8 Weeks to Wow; 8WW), and two government recommended healthy eating principles (Australian Guide to Healthy Eating; AGHE, and Mediterranean diet; MedDiet, for weight loss). Meal plans from each diet were analysed using Foodworks Dietary Software and compared with government recommendations and dietary reference values (DRV) in Australia, the United States and Ireland to give the percentage of the recommended intake of dairy food and calcium, met by each diet<span>(1)</span>. Intermittent Fasting, Ketogenic and AGHE provided the most serves of dairy foods with 2.8, 2.3 and 2.2 serves/d, respectively, whilst 8WW, MedDiet, and Optifast provided 1.4, 1.3 and 1 serve/d each, respectively, and Paleolithic 0.02 serves/d. None of the dietary patterns met all government recommendations for dairy serves. Milk was the most common source of dairy food in all dietary patterns except for Ketogenic (cheese), MedDiet (yoghurt) and Paleolithic. The Ketogenic diet provided the highest calcium content (1293mg/d), followed by Intermittent Fasting (1230mg/d) and Optifast (1212mg/d). Non-dairy sources contributed to 93% of the calcium content (385mg/d) of the Paleolithic diet, 70% for Optifast and 61% in the MedDiet (631mg/d). None of the dietary pattens met all dietary reference values for calcium. There are no universal dietary recommendations for dairy foods or calcium, making cross country comparisons of dietary recommendations difficult. Only the Intermittent Fasting diet met the dietary recommendations in Australia for dairy serves for males 19-70 and females 19-50 years. None of the other diets met any recommendation for Australia, the US and Ireland. Most dietary patterns met the estimated average requirement for age and gender, for calcium for Australia, the US and Ireland, apart from the Paleolithic diet which eliminates dairy foods and the MedDiet which is naturally low in dairy foods. These data indicate that several popular weight-loss diets do not meet dietary recommendations for dairy foods or calcium. Therefore, when considering a weight loss diet or dietary pattern, it is crucial to consider the nutritional adequacy, to ensure macro and micronutrient requirements are met for health and avoidance of nutritional deficiencies, particularly if followed long-term.</p>","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"162 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Swapping white for high-fibre bread exceeds fibre target and improves microbiome diversity","authors":"Y. Wang, B. Wymond, D. Belobrajdic","doi":"10.1017/s0029665124000338","DOIUrl":"https://doi.org/10.1017/s0029665124000338","url":null,"abstract":"<p>A majority of Australians consume a limited range of different dietary fibres and insufficient total dietary fibre<span>(1)</span>. This contributes to low intestinal microbial diversity and impaired microbial function, such as capability in producing beneficial metabolites like short-chain fatty acids (SCFA). This diet-induced dysbiosis is associated with poor gastrointestinal health and a broad range of non-communicable diseases<span>(2)</span>. Our study aimed to determine whether one dietary change, substitution of white bread with a high fibre bread improves faecal microbial diversity and butyrate-producing capability. Twenty-six healthy adults completed a randomised, cross-over, single-blinded intervention. Over the two intervention phases separated with a 4-wk washout, participants consumed either 3 slices of a high fibre bread (Prebiotic Cape Seed Loaf with BARLEYmax®) or control white bread as part of the usual diet, each for 2 weeks. At the beginning and end of each intervention period, participants completed a 24-h diet recall, a gut symptoms rating questionnaire and provided a faecal sample for microbiome analysis. The composition of faecal microbiome was characterised using 16S rRNA amplicon sequencing (V3-V4) and a marker of butyrate synthesis capability, the faecal content of butyryl-CoA:acetate CoA-transferase (BCoAT) gene was assessed using Real-time PCR. The high fibre bread intervention increased the servings of whole grain from 1.5 to 4 per day and increased total dietary fibre intake to 40 g/d which was double the amount of fibre consumed by participants at baseline or during the white bread intervention. Compared to white bread, the high fibre bread increased richness and evenness (Shannon, p = 0.014) of the gut microbiota and increased the relative abundance of SCFA producing taxa Lachnospiracae ND3007 group (p &lt;0.001, FDR = 0.019). In addition, the high-fibre bread tended to increase relative abundance of butyrate-producing genus <span>Roseburia</span>, and microbial BCoAT gene content compared to white bread. In conclusion, the substitution of white bread with high-fibre bread improved the diversity of gut microbiota, specific microbes involved in SCFA production and may enhance the butyrate production capability of gut microbiota in healthy adults.</p>","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"23 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Navigating Pacific nutrition and health at Brown Buttabean Motivation (BBM): Process evaluation and systems dynamics research at a flax-roots organization","authors":"F. Savila","doi":"10.1017/s0029665124000375","DOIUrl":"https://doi.org/10.1017/s0029665124000375","url":null,"abstract":"<p>Brown Buttabean Motivation (BBM) is a Māori and Pacific-driven community-based organisation operating in Tāmaki Makaurau (Auckland) and Tokoroa. It provides free community exercise bootcamps and other social and health support programs. BBM’s foundational mission was to reduce, among Māori and Pacific people, the prevalence of obesity in Auckland through exercise and nutrition programs.<span>1</span> This study aimed to understand participants’ engagement with BBM, and the meaning it has had in their lives, with a focus on nutrition. Combining Pacific Fonofale and Te Whare Tapa Wha frameworks, this was a process evaluation to understand the impact of BBM’s services on the community using qualitative methods and a systems analysis to identify program sustainability and improvement. Semi-structured interviews explored the benefits and values of engagement with BBM. Followed by cognitive mapping interviews (CMI) and group model building (GMB) to identify the motivations and challenges of sustained engagement. Participants described holistic health benefits and impacts on community wellbeing. BBM responds to inequitable nutrition contexts, through its FoodShare (food bank), community kitchen, and BBM Kai (nutrition literacy). Engagement changed family nutrition patterns, and benefits included healthier spending habits, and addressing food insecurity. Social inclusiveness represented the Fonofale foundation (family) and the roof (culture) was described as ethnic cultural practices and BBM culture. Nutrition was not highlighted by BBM participants in CMI or GMB activities. However, participants suggested BBM increase nutrition initiatives to enable all members to improve their health journeys. BBM was seen as not just an exercise program but their own and their family’s new way of life, that health was a journey, not a destination. Moreover, although participants mentioned nutrition and health benefits, there was an overwhelming understanding that the values of BBM, Pacific culture, and social collectivism were the drivers of engagement, motivating healthier practices. BBM could leverage existing strengths by incorporating nutrition-enabling initiatives that are achieved collectively. Opportunities for systematic intervention will be presented.</p>","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"15 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the effect of polyphenols from nuts on human carbohydrate digestion in vitro","authors":"M. Farazi, M.J. Houghton, M. Murray, B.R. Cardoso, G. Williamson","doi":"10.1017/s0029665124000739","DOIUrl":"https://doi.org/10.1017/s0029665124000739","url":null,"abstract":"&lt;p&gt;Recent studies have documented the importance of postprandial hyperglycaemia in the incidence of chronic diseases, including type 2 diabetes. Inhibition of digestive enzymes, including membrane-bound brush-border α-glucosidases, leads to slowed carbohydrate digestion and absorption, and reduced postprandial glycemia. Nuts are widely eaten around the world and have the potential to inhibit α-glucosidases through their content of polyphenols and other bioactive compounds. According to our recent systematic review&lt;span&gt;(1)&lt;/span&gt;, no study has investigated the inhibitory effects of nut extracts on human α-glucosidase activities. Almost all studies in this area have been conducted on yeast α-glucosidase, with only a few using rat α-glucosidase. While there is no sequence homology between yeast and human α-glucosidase, there is 74% to 78% sequence homology between rat and human α-glucosidases&lt;span&gt;(1)&lt;/span&gt;. The lack of studies on the effect of bioactive compounds from nuts on human α-glucosidases, along with the growing attention to nuts as an important component of a healthy diet with the potential to reduce the risk of chronic diseases&lt;span&gt;(2)&lt;/span&gt;, highlights the need for research to evaluate the inhibitory effect of nut extracts on human α-glucosidases. The aim of the current study is to explore the inhibitory effect of extracts from nuts on human carbohydrate digestive enzymes. Walnuts and almonds were ground and defatted with hexane, extracted in 80% (v/v) acetone, and further purified using solid-phase extraction to obtain phenolic-rich extracts. The Folin–Ciocalteu assay was used to approximate the polyphenol content of the samples. Following our recently published detailed protocol&lt;span&gt;(3)&lt;/span&gt;, cell-free extracts from human intestinal Caco-2/TC7 cells were used as a source of α-glucosidase in enzyme inhibition assays, with sucrose, maltose and isomaltose as substrates and appropriate controls. The assay products were quantified using high-performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD). Glucose production in the presence of various concentrations of phenol-rich nut extracts was compared using a one-way ANOVA and half-maximal inhibitory concentration (IC&lt;span&gt;50&lt;/span&gt;) values were calculated. The Folin–Ciocalteu data demonstrate that walnut extracts comprise a relatively high polyphenol content, with 18.1 ± 0.23 mg (epigallocatechin gallate [EGCG] equivalent) per gram of fresh weight, while almond extracts contain 0.87 ± 0.03 mg EGCG equivalent/g of fresh weight. The walnut phenolic-rich extract dose-dependently inhibited human intestinal sucrase and maltase activities (both &lt;span&gt;p&lt;/span&gt;&lt;0.01), with IC&lt;span&gt;50&lt;/span&gt; values of 1.67 mg/mL and 2.84 mg/mL, respectively. We demonstrate that phenolic-rich walnut extracts can inhibit human α-glucosidases &lt;span&gt;in vitro&lt;/span&gt; and therefore walnuts may contribute to slowing carbohydrate digestion in humans. As such, we plan to assess the effe","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"151 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cultivating Wellbeing: Traditional Wisdom and Sustainability in Fiji’s Green Schools","authors":"S. Katz, U. Matairakula, J. Cinavilakeba, T. Dradra, R. Carter, T. Tikoibua, B.G. Mitchell","doi":"10.1017/s0029665124000259","DOIUrl":"https://doi.org/10.1017/s0029665124000259","url":null,"abstract":"&lt;p&gt;This method abstract details the Green School Program, piloted across three schools in maritime Fijian islands, addresses critical issues faced by Fijian and Pacific Island communities. These encompass malnutrition, food security, health hazards, and the urgency of integrating traditional knowledge, governance, and social-ecological systems approaches into creating healthier school environments. Non communicable diseases have emerged as a pervasive concern within Pacific Island communities, creating a challenge for public health systems, driven greatly by dietary habits&lt;span&gt;(1)&lt;/span&gt;. This complex health landscape underscores the need to safeguard traditional knowledge and agri-food practices and develop neo-traditional approaches to local food systems&lt;span&gt;(2)&lt;/span&gt;. Furthermore, the Green School Program recognizes the essential role of schools as community hubs, enabling enhancing heathy school environments by embracing traditional wisdom and sustainable farming practices and foods, ultimately empowering communities to address these multifaceted challenges&lt;span&gt;(3)&lt;/span&gt;. Developing the school environment as a sustainable setting for governance framework led by women and the school administration, rooted in traditional knowledge and practices. Additionally, it aims to design facilities that support efficient organic farming while integrating these into school activities. Economic sustainability through the sale of surplus farm products, as well as the enhancement of sustainable land-use management, health, wellbeing, and cultural identity. The program unfolds within a distinctive community-based framework with the establishment of robust governance, with a notable emphasis on the leadership of women and mothers who play a pivotal role in steering the green school initiative and ensuring community ownership. Collaborative governance spans multiple stakeholders, including school management, community-based school committees, youth groups, women groups, and traditional leaders. This inclusive engagement ensures both shared responsibility in program design and ownership during implementation phases. Sustainable facilities are strategically designed to include biodigesters, water storage and irrigation systems, composting, organic fertilizers, and seedling nurseries, enhancing the program’s capacity to create healthier school food environments while embracing traditional practices and values. The program has witnessed the active engagement of women in governance roles, promoting community unity and ownership. Traditional knowledge integration has enhanced crop diversity and sustainability. Economic sustainability has been achieved through surplus farm product sales, reducing dependency on external funding sources. Health improvements are evident, with reduced exposure to indoor air pollution from open fires. Cultural identity preservation and increased student engagement are also notable outcomes. The Green School Program’s holistic approach,","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"49 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relative bioavailability of lutein and zeaxanthin in the presence of Omega-3- supplements and oxidative stress levels in humans","authors":"K. Kalu, S. Lin, C. McMonnies, J. Arcot","doi":"10.1017/s0029665124000715","DOIUrl":"https://doi.org/10.1017/s0029665124000715","url":null,"abstract":"&lt;p&gt;Lutein and zeaxanthin (LZ) are the major constituents of macular pigment (MP), helping to protect the human retina from blue light and oxidative damage&lt;span&gt;(1)&lt;/span&gt;. Many studies have suggested that higher concentrations of retina LZ may reduce the risk of age-related macular degeneration (AMD) and improve retinal health&lt;span&gt;(1–3)&lt;/span&gt;. MP and serum L have shown positive linear response with L dose&lt;span&gt;(4)&lt;/span&gt; but the combined effect (LZ + omega-3 suppl) has not been fully explored in healthy Australian adults. Understanding their bioavailability in relation to the effect of omega-3 fatty acid intakes along with LZ supplements could provide a useful indication of the potential to reduce the risk of AMD, preserve vision, and improve retinal health. LZ uptake and the associated oxidative stress levels were evaluated in two groups fed with commercially sourced supplements. The control group was given only LZ, while the intervention group was given LZ combined with omega-3 supplements containing Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA). 10 men and 6 women with an average age of 31.4 ± 1.3yrs participated in this randomised, non-blinded controlled study for a total of 19-d. The control group (9) consumed the LZ supplement (12mg/d) only, while the intervention group (7) consumed the LZ supplement along with 900mg/d of an omega-3 supplement (540mg EPA + DHA 360mg). Each group adhered to a comprehensive low-carotenoid and omega-3 diet list for the 12-d intervention period and the 7-d washout period. Participants reported daily foods consumed in their diet logbooks, and Automated Self-Administered 24 diet assessment log over the study period. The body composition of each subject from the two groups was assessed before and after the study using a SECA body composition analyser and blood samples (2-time point) collected over a 12-d test period. Mean ± SEM for serum LZ ranged from 2.23 ± 0.24 – 2.98 ± 0.24µg/ml for the control group and 1.10 ± 0.21–3.02 ± 0.73µg/ml for the intervention group. Percentage change in serum LZ concentration from (T&lt;span&gt;0&lt;/span&gt;-T&lt;span&gt;312h&lt;/span&gt;) and (T&lt;span&gt;312h&lt;/span&gt;-T&lt;span&gt;456h&lt;/span&gt;) were 26% and 34% (control) and 139% and 175% for (intervention), respectively. The Area Under the Curve (AUC&lt;span&gt;0-456h&lt;/span&gt;) differed significantly (P&lt;0.0469) during the entire study period (between groups) and related to the cumulative effect of intakes at various times of blood draw. LZ from the intervention group was 68% more bioavailable than the control group. The highest peak relative response in subjects in the control group was ≈33% (a 9.1-fold increase from baseline) at AUC &lt;span&gt;(168-312h)&lt;/span&gt; and ≈46% (a 6.6-fold increase from baseline) at AUC &lt;span&gt;(312-456h)&lt;/span&gt; for the intervention group. No significant (p&gt;0.05) effect of omega-3-supplement addition on oxidative stress levels was observed. Omega-3- addition to intakes of supplement LZ was responsible for the increased absorption (in","PeriodicalId":20751,"journal":{"name":"Proceedings of the Nutrition Society","volume":"19 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}