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Food Systems (One Earth Journal by Cell Press)

Access to food is a universal need and a fundamental right, yet current patterns of production and consumption are failing to address issues of food security while simultaneously deteriorating planetary health. In recognition of the urgent need to transform the way we consume, produce, and think about food, this collection of opinion pieces, authoritative reviews, original research articles, and artwork outlines the complexity of the challenge as well as potential solutions towards sustainable food systems for all. You can use the search feature to filter for Open Access Articles.

One Earth is Cell Press’ flagship sustainability journal. One Earth provides a home for high-quality research and perspectives that significantly advance our ability to better understand and address today’s sustainability challenges. We publish monthly thematic issues that aspire to break down barriers between the natural, social and applied sciences and the humanities, stimulate the cross-pollination of ideas, and encourage transformative research. They particularly encourage submissions with cross-disciplinary interest. Studies can be conducted at all spatial, temporal, and socio-political scales, but all submissions must offer a significant conceptual advance.

Solving the Great Food Puzzle: Right Innovation, Right Impact, Right Place. (2023)

WWF (2023). Solving the Great Food Puzzle: Right Innovation, Right Impact, Right Place. Loring, P., Loken, B., Meyer, M., Polack, S., Paolini, A., et al. WWF, Gland, Switzerland

Our food systems are at the centre of some of the biggest challenges of our time, which means they must also be at the centre of our quest for solutions.

As we work to solve the Great Food Puzzle, innovations are key to unlocking the potential of food systems as solutions to the nature and climate crises.

On its own, innovation won’t be enough to achieve healthy diets from sustainable food systems for all; still, innovations can accelerate national-level food system transformation by helping to close three critical gaps that can hinder action in countries. These gaps are: (i) the ambition gap; (ii) the transformation gap; and (iii) the implementation gap.

There is no one-size-fits-all solution that can deliver the food systems transformations needed in all countries around the world. The Right Innovation, Right Impact, Right Place framework will help anyone designing or supporting innovations in food systems to build an innovation toolkit to maximize impact and achieve national-level health and environmental goals.

Ultimately and most importantly, who is at the table and who is empowered to take the lead matters. What makes this paper novel is the set of concepts and questions we have assembled and how we bring these to life with examples of a wide range of innovations from around the world, some novel and highly technological, others familiar but applied in creative new ways.

As we all work to solve the Great Food Puzzle, we hope the Right Innovation, Right Impact, Right Place framework presented in this study will help ensure that each action taken will have the most impact in the shortest time possible.

RIGHT INNOVATION
means choosing innovations that amplify the impacts of transformation levers and ideally can be applied to affect one or more levers to accelerate change.

RIGHT IMPACT
means anticipating the kind of change and impact any proposed innovation might have in a particular place.

RIGHT PLACE
means paying close attention to the social and ecological context in which the innovation is to be implemented.

Optimizing sustainable, affordable, and healthy diets and estimating the impact of plant-based substitutes to milk and meat: A case study in Spain (2023 Sep)

Muñoz-Martínez, J., Abejón Elías R., Batlle-Bayer, L., Cussó-Parcerisas, I., Carrillo-Álvarez, E. (2023) Optimizing sustainable, affordable and healthy diets and estimating the impact of plant-based substitutes to milk and meat: A case study in Spain. Journal of Cleaner Production. Volume 424. https://doi.org/10.1016/j.jclepro.2023.138775. (paid access)

Relevant to: 

Dietitians and public health nutritionists, Health care professionals, Policy makers

Question: 

How is an environmentally sustainable, affordable, culturally acceptable, and nutritious diet determined in Spain? What is the sustainability of current Food-Based Dietary Guidelines (FBDG)? How much can we rely on plant-based milk and plant-based meat from a sustainability perspective ?

Bottom line for nutrition practice: 

  • It is paramount to evaluate the sustainability of diets from a holistic and context-based perspective. Our analysis revealed that although the Spanish FBDG have lower Greenhouse Gas emissions (GHGe) than current diets, they are more blue-water demanding and also more expensive due to the high content in plant-based foods.
  • We were able to determine a nutritious diet with the lowest environmental impact and lowest cost, but results revealed the need to apply actions at systems level to enable more environmentally respectful production practices, and make healthy foods more affordable.
  • Processed plant-based meat alternatives are not required to achieve a sustainable and healthy diet.

Abstract: 

  • The global food system is failing to appropriately nourish the population and has been identified as a driving force for environmental degradation. Changing current diets to healthier and more sustainable ones is key to decrease the incidence of non-communicable diseases and force changes at the production stage that will release environmental pressure. The determination of such diets is a challenge since it should be context specific, culturally acceptable, affordable, nutritionally adequate, and environmentally friendly.
  • Through multiobjective optimization we aimed to determine a sustainable and healthy diet (SHD) in Spain with the minimum cost and environmental impact (assessed through GHGe, land use and blue-water use) that deviate the least from current consumption. Additionally, this research also compares the optimised diet with the Spanish food-based dietary guidelines (FBDG), and explores the potential benefits of reducing animal meat and milk while replacing them with plant-based alternatives. Compared to current consumption, a SHD in Spain can be more nutritious and reduce cost, GHGe, land and blue-water use by 32%, 46%, 27%, and 41%, respectively.
  • The Spanish intake displayed the worst nutritional assessment and the highest values for GHGe and land use. The Spanish FBDG showed the highest cost and blue-water usage. Further analysis revealed that plant-based meat alternatives are not necessary to achieve a nutritionally adequate diet at the minimum cost and environmental impact. Shifting to fortified plant-based milk alternatives may add additional environmental benefits.
  • This work emphasizes the potentiality of using optimization to determine a SHD and identifies important gaps to be fulfilled in future research.

Details of results: 

  • Compared to the Spanish intake, a nutritionally adequate sustainable and healthy diet can be 1.61 € cheaper, reduce GHGe by 2.33 kgCO2eq, land use by 1.5 m2, and blue water use by 156 L. 
  • The Spanish FBDG basket was the most expensive and blue water demanding, mainly explained by the high content of fruits and vegetables. 
  • The Spanish intake showed the lowest nutritional index and the highest GHG and land footprint due to the high content of animal protein.

Of additional interest: 

Conflict of interest/ Funding:  

None

Corresponding author: 

Júlia Muñoz Martínez, juliamm1@blanquerna.url.edu

Academy of Nutrition and Dietetic’s Future of Food

In 2012, the Academy of Nutrition and Dietetics Foundation launched the Future of Food initiative. In October 2018 they released the Sustainable, Resilient, and Healthy Food and Water Systems dietetic internship concentration in collaboration with Nutrition and Dietetic Educators and Preceptors and the Accreditation Council for Education in Nutrition and Dietetics. The Future of Food page has a number of resources relavent to Dietitians and Nutritionists – Studies, Toolkits, Recorded Webinars, and Infographics.

Summary: Equipping nutrition graduates for the complex realities of practice: Using practitioner perspectives and experiences to inform authentic sustainability curriculum (2023)

Maher, J, Ashford, T, Verdonck, M, English, E, Burkhart, S. Equipping nutrition graduates for the complex realities of practice: Using practitioner perspectives and experiences to inform authentic sustainability curriculum. J Hum Nutr Diet. 2023; 1– 11. https://doi.org/10.1111/jhn.13159

Open access link to article:

https://onlinelibrary.wiley.com/doi/10.1111/jhn.13159

Relevant to:

Dietitians, Practitioners, Nutrition students, Nutrition graduates

Questions the research focuses on:

How do a cohort of Australian N&D professionals perceive opportunities for integrating sustainability into practice? What are the challenges or barriers to realizing these?

Bottom line for nutrition practice:

We recognize practitioners as a source of experience, anticipating where sustainability discourse and nutrition practice intersect.

Abstract:

Background: Nutrition professionals’ function at the nexus of food, nutrition status and the myriad of determinants influencing these. However, defining our role in food system transformation requires a multifaceted and deep understanding of sustainability in the context of nutrition and dietetics (N&D). Practitioner perspectives and experiences provide a rich source of practice wisdom that can inform authentic curriculum to equip students for the complex realities of practice; however, there is limited understanding of these in the Australian higher education setting.

Methods: Qualitative methodology using semi structured interviews with 10 Australian N&D professionals. Thematic analysis was used to understand how they perceive opportunities and barriers for integrating sustainability into practice.

Results: Practitioners’ experience in sustainability practice varied. Themes were identified in two categories: opportunities and barriers. Themes that reflected future practice opportunities included “Preparing the workforce” (for academics and practitioners interfacing with students), “Practical individual level work” and “System level and policy interests”. Themes that were considered barriers to integrating sustainability in practice included “lack of contextual evidence” and “complexity and competing priorities”.

Conclusions: Our findings make a novel contribution to the current literature as we recognise practitioners as a source of experience anticipating where sustainability and nutrition practice intersect. Our work provides practice-informed content and context that may assist educators to create authentic sustainability-focused curriculum and assessment to replicate the complexity of practice.

Details of results:

  • Practitioners found it difficult to name specific examples of sustainability in practice, possibly because of the current landscape where there is a lack of consensus on what sustainability in nutrition and dietetic practice is.
  • Integrating sustainability into nutrition practice was associated with two themes categorized as barriers. These were: a lack of contextual evidence, complexity and competing priorities.
  • Integrating sustainability into nutrition practice was also associated with three themes for opportunities: learning and teaching practice to prepare the workforce; individual-level practice and application; and broader system/policy-level practice.
  • The results show that opportunities and barriers are interconnected, and it is likely that the perceived opportunities can be realized if sectorial, institutional, and government policies change and the profession advances and adapts.
  • Preparing students for practicing with a sustainability lens requires integration of sustainability in its various forms into N&D curriculum and equipping them with the skills and capabilities to contribute meaningfully to N&D practice from an individual to food system level.
  • Knowledge alone may not equip graduates to effectively practice for human and planetary health. Moving forward, practice insights provide a productive platform for curriculum development, both situating practice within the current complex contexts or “realities” at the same time as also considering a future that integrates sustainability and nutrition more closely.
  • There is a predominant environmental focus that may limit the effectiveness of student training, particularly in addressing more challenging and complex situations or settings where environmental concerns must also be balanced with social and economic realities.
  • If governments or institutions have not yet included sustainability within their policies, curriculum developers can. This will then shift the expectation of N&D graduates who may be able to advocate for change from inside government and institutions.

Of additional interest:

⇾ ICDA Learning Modules – These three learning modules are structured to support your knowledge in:

  1. understanding foundational concepts of sustainability and food systems,
  2. understanding the relevance of SFS to nutrition and dietetic practice, and
  3. being able to apply SFS concepts in your practice.

⇾ NDA SFS Position Papers – Several nutrition and dietetics associations are officially recognising the relevance of Sustainable Food Systems (SFS) and/or sustainable diets to nutrition and dietetics practice.

⇾ SFS Education in Nutrition & Dietetics degrees: Global Case Studies – International Dietetic educators integrating sustainability into their curricula. The is an online platform for sharing examples serves as a series of mini case studies

⇾ Teaching Food Systems and Sustainability in Nutrition Education and Dietetic Training: Lessons for Educators (2013) – This is a PDF compilation of research and experiential lesson plans from food, nutrition and dietetic educators in the US and Canada.

⇾ The Food Sustainability Index (FSI) as an Educational Tool (2016) – The FSI has an intended audience of university students and graduate students, by can be used for anyone who interested in learning more about the connection of food and nutrition to sustainable food systems and the Sustainable Development Goals.

⇾ Sustainability: nutrition and dietetic students’ perceptions (2020) – This Australian study explored nutrition and dietetic undergraduate students’ self-reported views and actions related to sustainability, with a view to building a holistic curriculum that includes content and competencies required to address UN Sustainable Development Goals.

⇾ Leveraging Online Learning to Promote Systems Thinking for Sustainable Food Systems Training in Dietetics Education (2021) – A multidisciplinary group of educators, learners, and food systems experts representing eight different institutions across the US worked together over one year to develop, pilot test, and evaluate two interactive webinar series. The series was provided for dietetics interns and graduate students at four university sites in the United States between March and May 2019.

⇾ Summary: How do dietetics students learn about sustainability? A scoping review (2023) – Despite increasing discussion about the role of dietitians in supporting sustainable food systems, effective integration into dietetics curricula is understudied. Some evidence points to the importance of experiential learning, and scaffolded learning about SFS through integration into a number of different courses.

Conflict of interest/funding:

The authors declare that there are no conflicts of interest.

Corresponding author:

Judith Maher, Doctor of Philosophy (Nutrition and Dietetics), jmaher@usc.edu.au

Summary: How do dietetics students learn about sustainability? A scoping review (2023)

McCormack, J., Rutherford, S., Ross, L. J., Noble, C., & Bialocerkowski, A. (2023). How do dietetics students learn about sustainability? A scoping review. Nutrition & Dietetics. https://doi.org/10.1111/1747-0080.12795

Link to the article

Open Access: https://onlinelibrary.wiley.com/doi/epdf/10.1111/1747-0080.12795

Relevant to:

Dietetic Educators, Dietitians, Dietetic Students

Questions the research focuses on:

  1. What teaching approaches and evaluation strategies have been used to underpin the learning activities focused on sustainability in dietetics entry-level curricula?
  2. What are the learning outcomes of these activities based on the Kirkpatrick-Barr framework?
  3. Have the UNESCO and Commonwealth Secretariat recommendations translated into the delivery of sustainability content in nutrition and dietetics entry-level curricula based on articles published since their development?

Bottom line for nutrition practice:

Despite increasing discussion about the role of dietitians in supporting sustainable food systems, effective integration into dietetics curricula is understudied. Without clear competencies and guidance, educators are doing this ad hoc. More guidance is needed. Some evidence points to the importance of experiential learning, and scaffolded learning about SFS through integration into a number of different courses.

Abstract:

Aim: Globally, sustainability and planetary health are emerging as areas of critical importance. In 2015, the 2030 Agenda for Sustainable Development was adopted by the United Nations member states. Since then, the United Nations Educational, Scientific and Cultural Organization and the Commonwealth Secretariat have published guidelines for educators to embed sustainability content into curricula. This scoping review aims to identify how student dietitians learn about sustainability, how learning opportunities are evaluated, their outcomes, and whether these guidelines have translated into teaching activities contained in dietetic degrees.

Methods: A scoping review was used to address the aims. Eight electronic databases and Google Scholar were searched from inception to March 2022 for articles describing dietetics students’ participation in learning activities focused on sustainability. Data that addressed the research aims were charted independently by two researchers, then narratively synthesized.

Results: Twelve articles met the inclusion criteria. A range of teaching approaches and evaluation methods were used, from passive learning in lectures to experiential learning activities. A change in knowledge or behaviour was found for experiential learning activities (n = 5). For articles published after 2015 (n = 9), two mentioned the Sustainable Development Goals and no articles referenced the published guidelines.

Conclusions: A paucity of evidence exists describing how dietetics students learn about sustainability and their learning outcomes. Of the 12 articles published, varied teaching approaches and evaluation methods have resulted in inconsistencies in the reporting of outcomes. The minimal reference to the Sustainable Development Goals and published guidelines suggests a slow translation of knowledge to practice.

Details of results:

  • The database search yielded 1363 unique items. A total of 12 articles met the inclusion criteria and were therefore included in this scoping review. With 12 articles found, each used a unique method. This variety in both the teaching approach and evaluation makes it difficult for dietetics educators to choose an approach that maximizes the knowledge and skills attained by students.
  • Given the drive to upskill both students and dietitians alike in this critical area of practice, longer-term outcomes should be measured. Arguably, the depth and complexity of the knowledge required to develop dietetics students who are competent in this area cannot be taught in one course and requires the development of knowledge and skills to occur over a longer time period. This aligns with recommendations made by UNESCO and the Commonwealth Secretariate that suggest scaffolding content across multiple courses to develop key competencies. UNESCO recommends that educators embed an action-oriented, transformative pedagogy, that is scaffolded across the curriculum, and not contained in a stand-alone course.
  • Based on this review, only three articles referred to the Sustainable Development Goals, and no articles referred to the UNESCO or Commonwealth Secretariat Guidelines.
  • Without clear competencies from professional bodies and guidance on what to include in the curriculum, academics with an interest in sustainability may add content only when necessary.
  • Based on this review of peer-reviewed and grey literature, there is limited literature to describe how student dietitians are learning about sustainability within their dietetics education programs. The variable teaching approaches and evaluation methods used have resulted in inconsistencies in the reporting of outcomes, and the minimal reference to the Sustainable Development Goals and other published guidelines suggests a slow translation of knowledge to practice in the higher education setting.

Of additional interest: 

Conflict of interest/ funding:

Open access publishing facilitated by Griffith University, as part of the Wiley – Griffith University agreement via the Council of Australian University Librarians. The authors declare no conflicts of interests.

Corresponding author:

Joanna McCormack, Accredited Practising Dietitian (APD) j.mccormack@griffith.edu.au

Aquatic Foods Toolkit (2023)

A World of Aquatic Foods Resources: Open-access resources designed to empower chefs, foodservice, consumer packaged goods entrepreneurs, healthcare professionals, and other aquatic food advocates in promoting bivalves and sea vegetables.

🌐 You’ll get: Free, open-access toolkits, packed with evidence-based resources, eater insights, tested messaging, nutritional guidance, and inspiring recipes. Access to an interactive Aquatic Foods Ecosystem Map, so you can connect with others creating impact through sea vegetables and bivalves.

Aquatic foods—foods derived from aquatic animals, plants, or algae—have long been enjoyed traditionally by many cultures through the centuries. They have been highlighted in recent landmark reports for their ability to help build a healthy, diversified, equitable, and sustainable food future. Few topics today at the intersection of food, cuisine, health, and sustainability are more exciting than the vast potential of foods from the sea.

For this project, Food for Climate League joined forces with Food + Planet (F+P) and set out to develop narratives that can equip foodservice, CPG, retail, and nutrition professionals to market and promote sustainable aquatic foods successfully. With funding from Builders Initiative, they developed evidence-based health and wellness messaging and narratives for sustainable and nutritious aquatic foods, namely bivalves and sea vegetables.

🪸 The research outlined in the toolkits is a mix of qualitative and quantitative work conducted in 2022 to understand the aquatic foods landscape, including current and potential focus points and narratives around sustainable aquatic foods.

Strategies for reducing meat consumption within college and university settings: A systematic review and meta-analysis (2023 March)

Citation: Chang KB, Wooden A, Rosman L, Altema-Johnson D and Ramsing R (2023) Strategies for reducing meat consumption within college and university settings: A systematic review and meta-analysis. Front. Sustain. Food Syst. 7:1103060. doi: 10.3389/fsufs.2023.1103060 (open access)

  • Introduction: Despite the considerable public and planetary health benefits associated with reducing the amount of meat consumed in high-income countries, there is a limited empirical understanding of how these voluntary changes in food choice can be effectively facilitated across different settings. While prior reviews have given us broad insights into the varying capacities of behavior change strategies to promote meaningful reductions in meat consumption, none have compared how they perform relative to each other within a uniform dining context.
  • Methods: To address this gap in the literature, we synthesized the available research on university-implemented meat reduction interventions and examined the variations in the success rates and effect estimates associated with each of the three approaches identified in our systematic review.
  • Results: From our analyses of the 31 studies that met our criteria for inclusion (n = 31), we found that most were successful in reducing the amount of meat consumed within university settings. Moreover, independent of the number of individual strategies being used, multimodal interventions were found to be more reliable and effective in facilitating these changes in food choice than interventions targeting the choice architecture of the retail environment or conscious decision-making processes alone.
  • Discussion: In addition to demonstrating the overall value of behavior change initiatives in advancing more sustainable dining practices on college and university campuses, this study lends further insights into the merits and mechanics underlying strategically integrated approaches to dietary change. Further investigations exploring the persistence and generalizability of these effects and intervention design principles are needed.

3.4.1. Success rate variations

Figure 4. Grouped bar graph comparing the proportion of interventions associated with significant reductions in meat consumption across each investigated approach. Relative to other approaches, multimodal interventions were more likely to lead to significant reductions in the amount of meat consumed within university settings (p = 0.029). No increases in meat consumption were reported.

Over two-thirds of the included interventions were associated with significant reductions in meat consumption (67.7%). The remaining interventions yielded no differences in behavior (32.3%), with none of the included studies reporting any increases in meat consumption resulting from negative reactance or rebound effects.

Between the three investigated approaches, multimodal interventions were significantly more likely to be associated with reductions in meat consumption than those targeting conscious decision-making processes or the choice architecture of the retail environment alone (p = 0.029) (see Figure 4). There was no difference in the rate of success across interventions targeting the choice architecture of the retail environment and conscious decision-making process.

Interventions using at least two strategies concurrently were also more likely to be associated with reductions in meat consumption than interventions using a single strategy in isolation (p = 0.024), though both sets of interventions significantly reduced the amount of meat consumed within university settings on at least half of the evaluated occasions. Interventions that used promotional messaging strategies, in particular, were successful 57.1% of the time when used in isolation and 76.0% of the time when used in combination with other strategies (p = 0.029).

When comparing the performance between multimodal interventions and unimodal interventions leveraging two or more strategies, multimodal interventions were associated with a higher rate of success (100%, compared to 50.0%) and a greater overall effect on food choice (OR = 2.88 [1.95, 4.64]), compared to (OR = 2.13 [1.64, 3.05]).

There were no significant differences in the success rates associated with interventions conducted in Europe and North America (p = 0.28).

*Correspondence: Kenjin B. Chang, kbc45@cornell.edu

Seaweed’s contribution to food security in low- and middle-income countries: Benefits from production, processing and trade (2023 Jun)

Patrick Webb, Natalie K. Somers, Shakuntala H. Thilsted. Seaweed’s contribution to food security in low- and middle-income countries: Benefits from production, processing and trade. Global Food Security. Volume 37. (2023) 100686, ISSN 2211-9124, https://doi.org/10.1016/j.gfs.2023.100686.

Excerpts from the paper: One proposed solution has been to focus more on water-based food systems in general (often referred to as ‘blue foods’), and on seaweed in particular. But how realistic are such propositions? This paper explores the potential of seaweed to address food insecurity and poor nutrition in LMICs, alongside its potential to mitigate the carbon footprint of food systems globally.

This paper has five parts:

  1. First, an introduction
  2. The second section describes the types of seaweeds and major uses, their nutrient content and environmental attributes.
  3. Section three explores patterns and trends in the production, trade and consumption of seaweed, globally and within LMICs.
  4. A fourth section focuses on practical challenges and constraints to upscaling the use of seaweed in resource-constrained countries and highlights the kinds of investments needed to overcome hurdles.
  5. The final conclusions section offers recommendations for policy action.

Highlights:

  • Seaweed production globally has grown rapidly in recent decades.
  • Most growth was in Asia, but there have been production increases in Africa and Latin America.
  • There is growing attention to the potential for seaweed to provide non-terrestrial nutrients without the need for land, freshwater, or chemicals.
  • This paper explores opportunities and challenges relating to the farming and commercialization of seaweed in low- and middle-income countries (LMICs).
  • Data gaps and coverage impede a full understanding of trends and patterns in what is produced or consumed .
  • There appears to be potential for seaweed-related activities to grow in many coastal LMICs.
  • hat said, such activities would contribute more to food security through income effects than as inputs to diets.
  • Seaweed can be a high-value export crop contributing to LMIC food security by increasing export potential and household purchasing power.

Measurement of diets that are healthy, environmentally sustainable, affordable, and equitable: A scoping review of metrics, findings, and research gaps (2023 Apr)

Citation: Webb P, Livingston Staffier K, Lee H, Howell B, Battaglia K, Bell BM, Matteson J, McKeown NM, Cash SB, Zhang FF, Decker Sparks JL and Blackstone NT (2023) Measurement of diets that are healthy, environmentally sustainable, affordable, and equitable: A scoping review of metrics, findings, and research gaps. Front. Nutr. 10:1125955. doi: 10.3389/fnut.2023.1125955

Introduction: Research on the impacts of dietary patterns on human and planetary health is a rapidly growing field. A wide range of metrics, datasets, and analytical techniques has been used to explore the role of dietary choices/constraints in driving greenhouse gas (GHG) emissions, environmental degradation, health and disease outcomes, and the affordability of food baskets. Many argue that each domain is important, but few have tackled all simultaneously in analyzing diet-outcome relationships.

Methods: This paper reviews studies published between January 2015 and December 2021 (inclusive) that examined dietary patterns in relation to at least two of the following four thematic pillars: (i) planetary health, including, climate change, environmental quality, and natural resource impacts, (ii) human health and disease, (iii) economic outcomes, including diet cost/affordability, and (iv) social outcomes, e.g., wages, working conditions, and culturally relevant diets. We systematically screened 2,425 publications by title and abstract and included data from 42 eligible publications in this review.

Results: Most dietary patterns used were statistically estimated or simulated rather than observed. A rising number of studies consider the cost/affordability of dietary scenarios in relation to optimized environmental and health outcomes. However, only six publications incorporate social sustainability outcomes, which represents an under-explored dimension of food system concerns.

Discussion: This review suggests a need for (i) transparency and clarity in datasets used and analytical methods; (ii) explicit integration of indicators and metrics linking social and economic issues to the commonly assessed diet-climate-planetary ecology relationships; (iii) inclusion of data and researchers from low- and middle-income countries; (iv) inclusion of processed food products to reflect the reality of consumer choices globally; and (v) attention to the implications of findings for policymakers. Better understanding is urgently needed on dietary impacts on all relevant human and planetary domains simultaneously.

The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fnut.2023.1125955/full#supplementary-material

*Correspondence: Patrick Webb, patrick.webb@tufts.edu

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