Food Label Evidence

Etiquetado

Cambia realmente o que a xente compra o Nutri-Score?

Algo. O efecto maior pode ser sobre os fabricantes reformulando para obter unha mellor puntuación, que non é do que se debate normalmente.

Actualizada 3 min de lectura 40 citas Forza da evidencia 4/5

Bandexa de comida escolar compartimentada que contén cereais, proteína, lácteos, verduras e froitas
U.S. Department of Agriculture · Public domain · Wikimedia Commons

Que atopan as revisións

Unha revisión sistemática de 2025 sobre a efectividade do Nutri-Score [1] e unha revisión do impacto do etiquetado frontal [4] convirten: as etiquetas desvían a compra na dirección pretendida, e o desvío é pequeno. O traballo de validación por criterios [2] aborda unha cuestión diferente e anterior — se o algoritmo clasifica os alimentos da maneira que a ciencia nutricional faría — e a resposta é amplamente si, con casos límite coñecidos.

Os índices dietéticos que subxacen a estes sistemas tamén foron escrutados [3], o que importa porque un algoritmo de perfilado codifica xulgamentos discutibles sobre que nutrientes ponderar.

Efectos do etiquetado frontal

Os casos límite coñecidos

Os críticos sinalan que o aceite de oliva, os froitos secos e o queixo puntúan peor do que a intuición suxire, e que algúns refrescos dietéticos puntúan ben. Parte diso é xusto e parte malinterpreta o deseño: o Nutri-Score compara dentro das categorías sobre unha base de 100 g e non é un veredicto sobre se un alimento pertence a unha dieta saudable.

As revisións recentes do algoritmo abordaron varios destes casos. O punto máis profundo mantense: unha única letra non pode codificar todo sobre un alimento, e tratalo como se o fixese é un uso incorrecto en vez de un defecto.

O que significa legalmente unha afirmación de saúde

Na UE, as afirmacións nutricionais e de saúde están reguladas: só se permiten afirmacións autorizadas cunha base de evidencia aceptada, e cada unha está ligada a condicións específicas de uso. "Contribúe á función inmune normal" é unha frase licenciada cunha base definida, non prosa de mercadotecnia.

O que non está regulado é todo o que a rodea — imaxes, linguaxe de procedencia e termos como "natural" ou "saludable". A afirmación regulada é a declaración menos enganosa do paquete.

Preguntas frecuentes

É preciso o Nutri-Score?
Os traballos de validación indican que clasifica os alimentos de xeito xeralmente acorde coa súa calidade nutricional [2], con casos límite e revisións.
Por que o aceite de oliva obtén unha puntuación baixa?
É enerxeticamente denso e puntúase por cada 100 g. O sistema compara dentro de categorías en vez de declarar os alimentos bos ou malos.
As etiquetas cambian o comportamento?
Modestamente [1][4]. A reformulación podería ser o efecto maior.
Debería ser obrigatorio o Nutri-Score na UE?
Unha cuestión política. A evidencia apoia que "axuda un pouco e non fai dano", o cal é un argumento máis débil do que defende calquera dos dous bandos.
Exposición de froitas e verduras frescas nun supermercado de Estocolmo
Frankie Fouganthin · CC BY-SA 4.0 · Wikimedia Commons

Lectura relacionada

A evidencia detrás desta páxina Un gráfico de barras apiladas que mostra a composición das 40 publicacións citadas nesta páxina por tipo de estudo. 1622meta-analysis (16)randomised trial (22)review (2)
40 publicacións, 2002–2026. Esa é unha mestura con ensaios e sínteses, desde a cal unha afirmación sobre a causa é razoable. Fonte: a lista de citas propia desta páxina, abaixo.

Referencias

Cada cita abaixo enlaza co rexistro orixinal revisado por pares en PubMed ou a través de DOI. Nada aquí substitúe o consello médico.

  1. Efficacy of phytosterols for reduction of cardiometabolic risk factors: An umbrella review of systematic reviews and meta-analyses and updated dose-response meta-analyses of randomized trials Zurbau A, Haintz L, Chen V, et al. · Clinical nutrition (Edinburgh, Scotland) · 2026 · Meta-analysis DOIPubMed 42275989
  2. Nutri-Score effectiveness in improving consumers' nutrition literacy, food choices, health, and healthy eating pattern adherence: A systematic review Muzzioli L, Scenna D, Frigerio F, et al. · Nutrition (Burbank, Los Angeles County, Calif.) · 2025 · Systematic review DOIPubMed 40712552
  3. Criterion validation of nutrient profiling systems: a systematic review and meta-analysis Barrett EM, Afrin H, Rayner M, et al. · The American journal of clinical nutrition · 2024 · Meta-analysis DOIPubMed 37863430
  4. Dietary indices underpinning front-of-pack nutrition labels and health outcomes: a systematic review and meta-analysis of prospective cohort studies Montericcio A, Bonaccio M, Ghulam A, et al. · The American journal of clinical nutrition · 2024 · Meta-analysis DOIPubMed 38145705
  5. The Potential Effectiveness of Front-of-Pack Nutrition Labeling for Improving Population Diets Kelly B, Ng SH, Carrad A, et al. · Annual review of nutrition · 2024 · Systematic review DOIPubMed 38857543
  6. The Potential Effectiveness of Nutrient Declarations and Nutrition and Health Claims for Improving Population Diets Kelly B, Ng SH, Carrad A, et al. · Annual review of nutrition · 2024 · Systematic review DOIPubMed 38857539
  7. Impact of front-of-pack nutrition labelling in consumer understanding and use across socio-economic status: A systematic review Shrestha A, Cullerton K, White KM, et al. · Appetite · 2023 · Systematic review DOIPubMed 37169260
  8. Lifestyle, psychological and socio-demographic drivers in functional food choice: a systematic literature review based on bibliometric and network analysis Zanchini R, Di Vita G, Brun F · International journal of food sciences and nutrition · 2022 · Systematic review DOIPubMed 35264074
  9. A Systematic Review of Salt Reduction Initiatives Around the World: A Midterm Evaluation of Progress Towards the 2025 Global Non-Communicable Diseases Salt Reduction Target Santos JA, Tekle D, Rosewarne E, et al. · Advances in nutrition (Bethesda, Md.) · 2021 · Systematic review DOIPubMed 33693460Full text
  10. Impact of color-coded and warning nutrition labelling schemes: A systematic review and network meta-analysis Song J, Brown MK, Tan M, et al. · PLoS medicine · 2021 · Meta-analysis DOIPubMed 34610024Full text
  11. Health Benefits of Whey or Colostrum Supplementation in Adults ≥35 Years; a Systematic Review Blair M, Kellow NJ, Dordevic AL, et al. · Nutrients · 2020 · Systematic review DOIPubMed 31979025Full text
  12. The relationship between food label use and dietary intake in adults: A systematic review Anastasiou K, Miller M, Dickinson K · Appetite · 2019 · Systematic review DOIPubMed 31010704
  13. Claimed effects, outcome variables and methods of measurement for health claims proposed under European Community Regulation 1924/2006 in the area of blood glucose and insulin concentrations Martini D, Biasini B, Zavaroni I, et al. · Acta diabetologica · 2018 · Clinical guideline DOIPubMed 29383587
  14. Position of the academy of nutrition and dietetics: functional foods Crowe KM, Francis C · Journal of the Academy of Nutrition and Dietetics · 2013 · Clinical guideline DOIPubMed 23885705
  15. Review of the efficacy of green tea, isoflavones and aloe vera supplements based on randomised controlled trials Williamson G, Coppens P, Serra-Majem L, et al. · Food & function · 2011 · Systematic review DOIPubMed 21927741
  16. Position of the American Dietetic Association: functional foods Hasler CM, Brown AC · Journal of the American Dietetic Association · 2009 · Clinical guideline DOIPubMed 19338113
  17. Cow's milk compared to oat drink and its implications for lipid profile- a pilot randomized controlled trial Rosendahl-Riise H, Gravrok EO, Rung SL, et al. · Nutrition journal · 2026 · Randomised controlled trial DOIPubMed 41851782Full text
  18. Effectiveness of regular oat β-glucan-enriched bread compared with whole-grain wheat bread on long-term glycemic control in adults at risk of type 2 diabetes: a randomized controlled trial Hjorth T, Schadow A, Revheim I, et al. · The American journal of clinical nutrition · 2025 · Randomised controlled trial DOIPubMed 40571100Full text
  19. Nutri-score label influence on food purchase intention depends on consumers' expectations of healthiness Yamim AP, Werle COC · Appetite · 2025 · Randomised controlled trial DOIPubMed 39827945
  20. Do financial constraint and perceived stress modify the effects of food tax schemes on food purchases: moderation analyses in a virtual supermarket experiment Djojosoeparto SK, Poelman MP, Eykelenboom M, et al. · Public health nutrition · 2024 · Randomised controlled trial DOIPubMed 38224250Full text
  21. A randomized controlled trial to test the effects of displaying the Nutri-Score in food advertising on consumer perceptions and intentions to purchase and consume Courbet D, Jacquemier L, Hercberg S, et al. · The international journal of behavioral nutrition and physical activity · 2024 · Randomised controlled trial DOIPubMed 38622707Full text
  22. A Randomized Controlled Study to Test Front-of-Pack (FOP) Nutrition Labels in the Kingdom of Saudi Arabia Shin S, Alqunaibet AM, Alsukait RF, et al. · Nutrients · 2023 · Randomised controlled trial DOIPubMed 37447230Full text
  23. The impact of the nutri-score on food choice: A choice experiment in a Dutch supermarket van den Akker K, Bartelet D, Brouwer L, et al. · Appetite · 2022 · Randomised controlled trial DOIPubMed 34453996
  24. Impact of front-of-pack labels on the perceived healthfulness of a sweetened fruit drink: a randomised experiment in five countries Jáuregui A, White CM, Vanderlee L, et al. · Public health nutrition · 2022 · Randomised controlled trial DOIPubMed 34726144Full text
  25. Effects of Digital Food Labels on Healthy Food Choices in Online Grocery Shopping Fuchs KL, Lian J, Michels L, et al. · Nutrients · 2022 · Randomised controlled trial DOIPubMed 35631185Full text
  26. Secondary Outcomes of a Front-of-Pack-Labelling Randomised Controlled Experiment in a Representative British Sample: Understanding, Ranking Speed and Perceptions Packer J, Russell SJ, Ridout D, et al. · Nutrients · 2022 · Randomised controlled trial DOIPubMed 35683988Full text
  27. Labels Affect Food Choices, but in What Ways? Kühne SJ, Reijnen E, Granja G, et al. · Nutrients · 2022 · Randomised controlled trial DOIPubMed 35956380Full text
  28. Nutri-Score and NutrInform Battery: Effects on Performance and Preference in Italian Consumers Fialon M, Serafini M, Galan P, et al. · Nutrients · 2022 · Randomised controlled trial DOIPubMed 36079769Full text
  29. Impact of different front-of-pack nutrition labels on online food choices Santos O, Alarcão V, Feteira-Santos R, et al. · Appetite · 2020 · Randomised controlled trial DOIPubMed 32798050
  30. Understanding of different front-of-package labels by the Spanish population: Results of a comparative study Galan P, Egnell M, Salas-Salvadó J, et al. · Endocrinologia, diabetes y nutricion · 2020 · Randomised controlled trial DOIPubMed 31122890
  31. Enhancing the effectiveness of the Health Star Rating via presentation modifications Pettigrew S, Dana L, Talati Z · Australian and New Zealand journal of public health · 2020 · Randomised controlled trial DOIPubMed 31777119
  32. Randomized trial evaluating the effectiveness of within versus across-category front-of-package lower-calorie labelling on food demand Finkelstein EA, Ang FJL, Doble B · BMC public health · 2020 · Randomised controlled trial DOIPubMed 32164634Full text
  33. Pilot randomized controlled trial testing the influence of front-of-pack sugar warning labels on food demand Ang FJL, Agrawal S, Finkelstein EA · BMC public health · 2019 · Randomised controlled trial DOIPubMed 30732609Full text
  34. Acceptability and understanding of front-of-pack nutritional labels: an experimental study in Mexican consumers Vargas-Meza J, Jáuregui A, Contreras-Manzano A, et al. · BMC public health · 2019 · Randomised controlled trial DOIPubMed 31888575Full text
  35. The Effect of Randomly Providing Nutri-Score Information on Actual Purchases in Colombia Mora-García CA, Tobar LF, Young JC · Nutrients · 2019 · Randomised controlled trial DOIPubMed 30813605Full text
  36. A randomised controlled trial comparing a dietary antiplatelet, the water-soluble tomato extract Fruitflow, with 75 mg aspirin in healthy subjects O'Kennedy N, Crosbie L, Song HJ, et al. · European journal of clinical nutrition · 2017 · Randomised controlled trial DOIPubMed 27876806Full text
  37. Prebiotic Potential of a Maize-Based Soluble Fibre and Impact of Dose on the Human Gut Microbiota Costabile A, Deaville ER, Morales AM, et al. · PloS one · 2016 · Randomised controlled trial DOIPubMed 26731113Full text
  38. Behavioural effects of directive cues on front-of-package nutrition information: the combination matters! Koenigstorfer J, Wąsowicz-Kiryło G, Styśko-Kunkowska M, et al. · Public health nutrition · 2014 · Randomised controlled trial DOIPubMed 23954043Full text
  39. Not all nutrition claims are perceived equal: anchoring effects and moderating mechanisms in food advertising Paek HJ, Yoon HJ, Hove T · Health communication · 2011 · Randomised controlled trial DOIPubMed 21308579
  40. Soluble fiber intake at a dose approved by the US Food and Drug Administration for a claim of health benefits: serum lipid risk factors for cardiovascular disease assessed in a randomized controlled crossover trial Jenkins DJ, Kendall CW, Vuksan V, et al. · The American journal of clinical nutrition · 2002 · Randomised controlled trial DOIPubMed 11976156

Esta páxina foi traducida automáticamente do inglés. As citas e os números non mudaron. Le o orixinal en inglés se algo soa raro. Ler o orixinal en inglés