Workplace nutrition education promotes sustainable eating and Mediterranean diet adherence among university employees: a quasi-experimental pre-post study
DOI:
https://doi.org/10.14306/renhyd.30.4.2843Keywords:
Feeding Behaviour, 4. Diet, Mediterranean, Food labelling, healthy diet, healthAbstract
Introduction: Workplaces are key settings for promoting healthy and sustainable dietary behaviours, yet evidence on nutrition education interventions addressing both outcomes remains limited. This study aimed to evaluate the effectiveness of a workplace nutrition education programme to improve dietary knowledge, promote sustainable food choices, and increase adherence to the Mediterranean diet among academic and non-academic university employees.
Methods: A quasi-experimental pre–post intervention study was conducted among 75 academic and non-academic university employees at Universidad Isabel I. This intervention included three face-to-face nutrition education workshops lasting 30-40 min: healthy diet, food labelling, and planning your healthy menu. Posters summarising key messages were displayed after each workshop. Participants completed an online questionnaire before and after the workshop series. The questionnaire included study-specific items and items adapted from validated instruments, and collected sociodemographic data, health data, exploratory self-reported anthropometric and body weight perception data, nutritional knowledge and practices, understanding of visual plate tools, food planning, diet environmental impact, food choice, shopping habits, food-labelling use, ability to identify healthy foods, and adherence to the Mediterranean diet (range: 0–13 points).
Results: The nutritional intervention significantly improved dietary knowledge (p = 0.003), with awareness of visual plate tools increasing from 72% to 100% (p < 0.001). Meal planning practices also improved (p < 0.05). Environmentally sustainable actions (e.g., buying local, seasonal produce) increased from 3.71 to 4.31 actions (p = 0.016), and Mediterranean diet adherence increased from 8.31 to 8.81 points (p = 0.034). While food-labelling consultation frequency remained unchanged, participants found it easier to identify healthy products (p = 0.002). No significant changes were observed in exploratory anthropometric or body weight perception measures.
Conclusions: Workplace nutrition education effectively improved university employees' dietary knowledge and practices, promoted sustainable food choices, and enhanced adherence to the Mediterranean diet.
Funding: This study received financial support from Universidad Isabel I for practical materials and informational posters.
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References
(1) World Health Organization. Global action plan for the prevention and control of noncommunicable diseases, 2013-2020 [internet]. Geneva: World Health Organization; 2013. Disponible en: https://iris.who.int/server/api/core/bitstreams/15f51d0a-bfbd-43ad-a637-73778feb57e3/content
(2) Rachmah Q, Martiana T, Mulyono, Paskarini I, Dwiyanti E, Widajati N, et al. The Effectiveness of Nutrition and Health Intervention in Workplace Setting: A Systematic Review. J Public Health Res. 2022;11(1), doi: 10.4081/jphr.2021.2312. DOI: https://doi.org/10.4081/jphr.2021.2312
(3) Proper KI, van Oostrom SH The effectiveness of workplace health promotion interventions on physical and mental health outcomes – a systematic review of reviews. Scand J Work Environ Health. 2019;45(6):546-559, doi: 10.5271/sjweh.3833. DOI: https://doi.org/10.5271/sjweh.3833
(4) Clohessy S, Walasek L, Meyer C Factors influencing employees’ eating behaviours in the office‐based workplace: A systematic review. Obes Rev. 2019;20(12):1771-80, doi: 10.1111/obr.12920. DOI: https://doi.org/10.1111/obr.12920
(5) Lim TJ, Okine RN, Kershaw JC Health- or Environment-Focused Text Messages as a Potential Strategy to Increase Plant-Based Eating among Young Adults: An Exploratory Study. Foods. 2021;10(12):3147, doi: 10.3390/foods10123147. DOI: https://doi.org/10.3390/foods10123147
(6) Macdiarmid JI, Whybrow S Nutrition from a climate change perspective. Proc Nut Soc. 2019;78(3):380-387, doi: 10.1017/S0029665118002896. DOI: https://doi.org/10.1017/S0029665118002896
(7) Springmann M, Wiebe K, Mason-D’Croz D, Sulser TB, Rayner M, Scarborough P Health and nutritional aspects of sustainable diet strategies and their association with environmental impacts: a global modelling analysis with country-level detail. Lancet Planet Health. 2018;2(10):e451-461, doi: 10.1016/S2542-5196(18)30206-7. DOI: https://doi.org/10.1016/S2542-5196(18)30206-7
(8) Clark MA, Springmann M, Hill J, Tilman D Multiple health and environmental impacts of foods. Proc Natl Acad Sci U S A. 2019;116(46):23357-23362, doi: 10.1073/pnas.1906908116. DOI: https://doi.org/10.1073/pnas.1906908116
(9) Pelletier JE, Laska MN, Neumark-Sztainer D, Story M Positive Attitudes toward Organic, Local, and Sustainable Foods Are Associated with Higher Dietary Quality among Young Adults. J Acad Nutr Diet. 2013;113(1):127-32, doi: 10.1016/j.jand.2012.08.021. DOI: https://doi.org/10.1016/j.jand.2012.08.021
(10) Comité Científico AESAN (Grupo de Trabajo). Informe del Comité Científico de la Agencia Española de Seguridad Alimentaria y Nutrición (AESAN) sobre recomendaciones dietéticas sostenibles y recomendaciones de actividad física para la población española [Internet]. Rev Com Cient AESAN. 2022;(36):11-70. Disponible en: https://www.aesan.gob.es/AECOSAN/docs/documentos/seguridad_alimentaria/evaluacion_riesgos/informes_comite/INFORME_RECOMENDACIONES_DIETETICAS.pdf
(11) United Nations. Sustainable Development Goals: The 17 Goals [Internet]. New York: United Nations; 2015 [citado 29 de julio de 2026]. Disponible en: https://sdgs.un.org/goals DOI: https://doi.org/10.18356/90048b6a-en
(12) Kiani AK, Medori MC, Bonetti G, Aquilanti B, Velluti V, Matera G, et al. Modern vision of the Mediterranean diet. J Prev Med Hyg. 2022;63(2 Suppl 3):E36-E43, doi: 10.15167/2421-4248/jpmh2022.63.2S3.2745.
(13) Serra-Majem L, Tomaino L, Dernini S, Berry EM, Lairon D, Ngo de la Cruz J, et al. Updating the Mediterranean Diet Pyramid towards Sustainability: Focus on Environmental Concerns. Int J Environ Res Public Health. 2020;17(23):8758, doi: 10.3390/ijerph17238758. DOI: https://doi.org/10.3390/ijerph17238758
(14) Shangguan S, Afshin A, Shulkin M, Ma W, Marsden D, Smith J, et al. A Meta-Analysis of Food Labeling Effects on Consumer Diet Behaviors and Industry Practices. Am J Prev Med. 2019;56(2):300-314, doi: 10.1016/j.amepre.2018.09.024. DOI: https://doi.org/10.1016/j.amepre.2018.09.024
(15) U.S. Department of Agriculture. MyPlate.gov [Internet]. Washington, DC: U.S. Department of Agriculture; [citado 29 de julio de 2026]. Disponible en: https://web.archive.org/web/20241231153908/https://www.myplate.gov/
(16) Harvard T.H. Chan School of Public Health. Healthy Eating Plate. The Nutrition Source [Internet]. Boston (MA): Harvard T.H. Chan School of Public Health; 2011 [citado 29 de julio de 2025]. Disponible en: https://nutritionsource.hsph.harvard.edu/healthy-eating-plate/
(17) Schröder H, Fitó M, Estruch R, Martínez-González MA, Corella D, Salas-Salvadó J, et al. A Short screener is valid for assessing mediterranean diet adherence among older spanish men and women. J Nutr. 2011;141(6):1140-5, doi: 10.3945/jn.110.135566. DOI: https://doi.org/10.3945/jn.110.135566
(18) Kliemann N, Wardle J, Johnson F, Croker H Reliability and validity of a revised version of the General Nutrition Knowledge Questionnaire. Eur J Clin Nutr. 2016;70(10):1174-1180, doi: 10.1038/ejcn.2016.87. DOI: https://doi.org/10.1038/ejcn.2016.87
(19) Harris C V, Bradlyn AS, Coffman J, Gunel E, Cottrell L BMI-based body size guides for women and men: development and validation of a novel pictorial method to assess weight-related concepts. Int J Obes. 2008;32(2):336-42, doi: 10.1038/sj.ijo.0803704. DOI: https://doi.org/10.1038/sj.ijo.0803704
(20) Gaspar MC de MP, Celorio-Sardà R, Comas-Basté O, Latorre-Moratalla ML, Aguilera M, Llorente-Cabrera GA, et al. Knowledge and perceptions of food sustainability in a Spanish university population. Front Nutr. 2022; 9:970923, doi: 10.3389/fnut.2022.970923. DOI: https://doi.org/10.3389/fnut.2022.970923
(21) Pérez-Armijo P. Etiquetado frontal de alimentos: percepción, comprensión y cambios en la intención de compra en población española con y sin enfermedades crónicas. Un estudio comparativo entre Nutri-Score y Sellos de Advertencia [tesis doctoral en Internet]. Leioa: Universidad del País Vasco/Euskal Herriko Unibertsitatea; 2022 [citado 5 de agosto de 2026]. Disponible en: https://hdl.handle.net/10810/59193
(22) Anderson BO, Berdzuli N, Ilbawi A, Kestel D, Kluge HP, Krech R, et al. Health and cancer risks associated with low levels of alcohol consumption. Lancet Public Health. 2023;8(1):e6-7, doi: 10.1016/S2468-2667(22)00317-6. DOI: https://doi.org/10.1016/S2468-2667(22)00317-6
(23) McCarthy WJ, Rico M, Chandler M, Herman DR, Chang C, Belin TR, et al. Randomized Comparative Effectiveness Trial of 2 Federally Recommended Strategies to Reduce Excess Body Fat in Overweight, Low-Income Patients: MyPlate.gov vs Calorie Counting. Ann Fam Med. 2023;21(3):213-9, doi: 10.1370/afm.2964. DOI: https://doi.org/10.1370/afm.2964
(24) Schwartz JL, Vernarelli JA Assessing the Public’s Comprehension of Dietary Guidelines: Use of MyPyramid or MyPlate Is Associated with Healthier Diets among US Adults. J Acad Nutr Diet. 2019;119(3):482-9, doi: 10.1016/j.jand.2018.09.012. DOI: https://doi.org/10.1016/j.jand.2018.09.012
(25) Prochaska JO, DiClemente CC Stages and processes of self-change of smoking: Toward an integrative model of change. J Consult Clin Psychol. 1983;51(3):390-5, doi: 10.1037/0022-006X.51.3.390. DOI: https://doi.org/10.1037/0022-006X.51.3.390
(26) Monroe JT, Lofgren IE, Sartini BL, Greene GW The Green Eating Project: web-based intervention to promote environmentally conscious eating behaviours in US university students. Public Health Nutr. 2015;18(13):2368-78, doi: 10.1017/S1368980015002396. DOI: https://doi.org/10.1017/S1368980015002396
(27) de Boer J, de Witt A, Aiking H Help the climate, change your diet: A cross-sectional study on how to involve consumers in a transition to a low-carbon society. Appetite. 2016;98:19-27, doi: 10.1016/j.appet.2015.12.001. DOI: https://doi.org/10.1016/j.appet.2015.12.001
(28) Contento IR Nutrition education: linking research, theory, and practice. Asia Pac J Clin Nutr. 2008;17 Suppl 1:176-9.
(29) García Pérez de Sevilla G, Barceló Guido O, De la Cruz M de la P, Blanco Fernández A, Alejo LB, Montero Martínez M, et al. Adherence to a Lifestyle Exercise and Nutrition Intervention in University Employees during the COVID-19 Pandemic: A Randomized Controlled Trial. Int J Environ Res Public Health. 2021;18(14):7510, doi: 10.3390/ijerph18147510. DOI: https://doi.org/10.3390/ijerph18147510
(30) Roset-Salla M, Ramon-Cabot J, Salabarnada-Torras J, Pera G, Dalmau A. Educational intervention to improve adherence to the Mediterranean diet among parents and their children aged 1–2 years. EniM clinical trial. Public Health Nutr. 2016;19(6):1131-44, doi: 10.1017/S1368980015002219. DOI: https://doi.org/10.1017/S1368980015002219
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Copyright (c) 2020 Alba Abia, Patricio Pérez-Armijo, Inmaculada Rebollo Romero, María Martínez-Ferrán
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