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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

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

SEAFOOD TOMORROW (2021)

cover of the book — Wilson, Annette M., Reuver, Marieke, Santos, Marta, & Marques, António. (2021). SEAFOODTOMORROW Key Achievements Booklet – Nutritious, safe and sustainable seafood for the future. Zenodo. **https://doi.org/10.5281/zenodo.4696236**

SEAFOOD TOMORROW was a €7m European Union Horizon 2020-funded project that ran from 2017-2021 that aimed to develop innovative sustainable solutions for improving the safety and dietary properties of seafood in Europe.

Addressing the challenge to meet the growing market need for safe and sustainable seafood, the project generated new knowledge to develop commercial solutions for improving the socio-economic and environmental sustainability of the European seafood production and processing industry.

This interactive booklet summarises the key achievements of the SEAFOOD TOMORROW project: Nutritious, safe and sustainable seafood for consumers of tomorrow.

This booklet is for all seafood stakeholders, including industry representatives, policy- and decision-makers, and seafood consumers.

They present the Eco-Innovative Solutions and Key Exploitable Results generated by the SEAFOOD TOMORROW team, including their potential or realised impact, a summary of dissemination and exploitation activities carried out, and the next steps needed to ensure maximum uptake and legacy of the SEAFOOD TOMORROW outcomes.

Marine Conservation Society & Good Fish Guide (website)

**Click to visit the MSC Good Fish Guide**

Marine Conservation Society (MSC) is fighting for a cleaner, better protected, healthier ocean: one we can all enjoy.

For a cleaner ocean, MSC campaigns to stop pollution entering our oceans, and volunteer beach cleans remove and record the litter on the UK coastline. Using science, MSC tracks the health of our waters, influences business practice, and calls for better environmental regulations.

For a better-protected ocean MSC secures space where species and habitats can recover. MSC is campaigning for a minimum of 30% of UK waters being effectively managed by 2030 to protect wildlife and ecosystems. Only seas full of life can absorb carbon and help tackle climate change.

For a healthier ocean MSC promotes sustainable fishing and seafood to minimise harm. MSC support businesses to catch, produce and source seafood sustainably and incorporate conservation into their work. The MSC Good Fish Guide highlights the most and least sustainable fish, so people can make better seafood-buying choices.

MSC makes sure ratings are as up-to-date as possible, aiming to review them all at least once every three years. Many are updated annually. Any significant changes, like new laws or new scientific evidence, may trigger an update. For transparency and credibility, MSC researches and drafts a set of ratings updates, and puts them out to consultation. Scientists, fishermen, and businesses review proposed updates and provide extra information. In between consultations and launches, MSC is working on the next set of ratings updates, so always looking out for important changes and incorporating the latest available information. MSC follows two separate processes, one for farmed seafood and one for wild-caught, allowing us to address key issues for each area.

FishChoice Calculator (Website)

About us

Click to go to FishChoice, your personal fish calculator

This is a personal fish consumption calculator. Seafood has been recognised as a high-quality, healthy and safe food type and is one of the most important food commodities consumed worldwide. However, seafood, like other types of food, can also be a source of harmful environmental contaminants with potential to impact on human health.

FISHCHOICE is part of the H2020 project SEAFOODTOMORROW, aimed at assessing food safety issues related to priority contaminants present in seafood as a result of environmental contamination and evaluating their impact on public health.

Nutrition Professionals as Environmental Stewards and Climate Champions (2022 Mar)

This is an excerpt of a blog post on the Planetary Health Collective site written by Mary Purdy, MS, RDN:

“The intersection of the food system, the environment and human health is nothing short of complex, but as experts in the food and nutrition space, we have an incredible opportunity (and obligation) to be trailblazers in the fight around climate change.

No matter what sector of the nutrition field we work in, we can exert our influence in many areas, from individual and institutional food consumption to national level food policy. Whether we work with what’s being eaten, how it’s being grown or how it’s being disposed of, we can make a difference. If you write, speak publicly or have an online platform, you can use it to educate on and promote these ideas and to make plant based food look as delicious as humanly possible. If you are in academia, you can incorporate issues of sustainability and regenerative agriculture into any and all aspects of your curriculum.

Again, as systems thinkers and those with a vested interest in human wellness, we cannot separate a healthy foods system from a healthy biological or eco-system. The good news is that the foods that are healthy for humans are usually those that have a lighter environmental footprint [17]. It appears that once again, food is not only medicine for the person, but for the planet and nutrition professionals are leading the charge.”

—

Mary Purdy, MS, RDN is an award-winning integrative eco-dietitian and nutrition educator with a Master’s Degree from Bastyr University, where she is currently adjunct faculty. She has been in clinical practice for 13+ years using a personalized medicine and functional nutrition approach. She teaches and lectures for numerous Universities, institutions and professional educational platforms and presents regularly at national and state conferences on both nutrition and sustainability. She serves as the nutrition and sustainability adviser for Big Bold Health, hosts the podcasts “The Nutrition Show” and “The Good Clean Nutrition Podcast” and authored the books “Serving the Broccoli Gods” and “The Microbiome Diet Reset.” She is a sought-after speaker, consultant and community builder working with organizations to create a more sustainable, just and resilient food system.

Mary has amassed a myriad of scientific papers on a variety of topics on her website related to the impacts of our current industrial food and agricultural system and the effects it is having on human and planetary health.

How to Effectively Encourage Sustainable Food Choices: A Mini-Review of Available Evidence (2022 Nov)

This is open-access peer review mini-review from Frontiers (Psychology) by Wokje Abrahamse, School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, New Zealand. He describes the review as the following:

“Food choices are difficult to change. People’s individual motivations (such as taste, cost, and food preferences) can be at odds with the negative environmental outcomes of their food choices (such as deforestation, water pollution, and climate change). How then can people be encouraged to adopt more sustainable food choices?

This rapid review uses a dual-processing framework of decision-making to structure an investigation of the effectiveness of interventions to encourage sustainable food choices (e.g., local and organic food consumption, reducing meat and dairy intake, reducing food waste) via voluntary behavior change. The review includes interventions that rely on fast, automatic decision-making processes (e.g., nudging) and interventions that rely on more deliberate decision-making (e.g., information provision). These interventions have varying degrees of success in terms of encouraging sustainable food choices.

This mini-review outlines some of the ways in which our understanding of sustainable food choices could be enhanced. This includes a call for the inclusion of possible moderators and mediators (past behavior, attitudes, beliefs, values) as part of effect measurements, because these elucidate the mechanisms by which behavior change occurs. In light of the climate change challenge, studies that include long-term effect measurements are essential as these can provide insight on how to foster sustained and durable changes.”

This article was shared with us through our ICDA SFS Toolkit Community of Practice forum titled: Behaviour Change Techniques In Sustainability. Join us on the forum to learn & GROW together!

Nordic food systems for improved health and sustainability: Baseline assessment to inform transformation (2019)

According to the report “Nordic food systems for improved health and sustainability: Baseline assessment to inform transformation (2019)”, there are sufficient data on Nordic food systems to understand the crucial action areas and to begin taking immediate steps towards food systems transformations. A transformation implies a journey into aspects partly unknown and untested. The report highlights the complementarity of scientific assessment and normative dialogue on this journey.

Dietitians and Nutritionists (D-Ns) are key to this! From the report:

Food system actors would benefit from building a common understanding of desired pathways towards transformation, which should be informed by the best available evidence. This can be achieved through sustained, cross-sectoral (e.g. policy, business, research, civil society, producer, consumer) stakeholder dialogues. It is particularly important to include stakeholders who are often marginalized in these types of collaborative decision-making processes.

There will be challenges to initiating these changes, such as adopting a ‘whole food system’ approach; addressing trade-offs among food system goals; and confronting prevailing forces and lock-ins. Yet these challenges should not be an excuse for inaction.

Key messages

Food systems should be a critical lever of change in the Nordics to reach global health and environmental sustainability commitments.
The gap between current and desired food systems is substantial enough to require transformative change.
An integrated food systems approach aligning agricultural, production, trade, manufacturing, retailing and consumption priorities must be taken.
There is enough evidence on necessary food system changes to begin action in setting current food systems on a trajectory towards healthy and sustainable development.
Sustained, multi-sectoral forums are needed to steer Nordic food system transformation.

Next steps

Begin immediate action to transform Nordic food systems
Initiate a multi-stakeholder scenario development process to define a common vision for Nordic food systems
Develop strategies to handle the trade-offs of change
Evaluate Nordic food systems in the global context

Acknowledgement: This page is an extracted from the introduction to the report.

Catalan Food Based Dietary Guideline (2020)(Catalan)

The Catalan Food Based Dietary Guideline was developed by the Catalan Public Health Agency and is a very useful tool for following a healthy and sustainable diet. Sustainability recommendations are provided in boxes called “care about the environment” such as drinking tap water, prioritizing consumption of legumes more than meat, consuming local foods, purchasing olive oil in large packaging to reduce plastic use, and more.

This resource is in Catalan only. It was provided by @juliamunoz_dn the ICDA SFS Toolkit’s Regional Contact for Spain.

Guide to a healthy and low-cost diet for families with children (2020)(Spanish)

The ICDA SFS Toolkit Regional Contact for Spain, Júlia Muñoz (@juliamunoz_dn in our COP), collaborated with her colleagues (Dr, RD Elena Carrillo, RD Marta Anguera, and Dr Irene Cussó) in the development of this document to help citizens follow a healthier and more sustainable diet at the minimum cost. This guideline is based on the results of a previous European-lead research carried out at Blanquerna School of Health Sciences Ramon Llull University to promote a healthy and economical diet for different types of families. They then worked with the Barcelona City Council to publish two documents:

1) Guide to a healthy and low-cost diet for families with children. The guide can serve municipal professionals and other social agents or entities to support families in situations of social vulnerability in the field of food. The ultimate goal is to have a useful tool that families and entities can use to quickly manage the fundamental right to adequate food with a small budget.

2) A booklet on Healthy and economic food for families with children. This is a practical booklet for all citizens, mainly aimed at families with children and adolescents from 18 months to 18 years old, especially in situations of economic difficulties, which provides them with guidance and recommendations to prepare healthy and economic daily meals. The guide provides a shopping list for different types of families, seasonal menus, and an estimated cost for one person. The sample menus were prepared based on recommendations of the Spanish Society of Community Nutrition and the Public Health Agency of Catalonia.

Júlia explains that the recommendations include practices for food sustainability such as the use of leftovers to create new recipes or select seasonal foods. Given the current situation of increasing food insecurity due to the rise of food prices, and acknowledging that when people suffer from stress they tend to eat convenient and non-healthy foods (which have a high environmental impact apart from impairing health), it is important to identify these types of resources to keep promoting sustainable diets in a practical way.