Poor eating habits are increasing the prevalence of weight-related issues, such as diabetes and cardiovascular diseases. Given the demand to improve individuals’ food knowledge and competencies aiming at healthier behaviours, the current investigation explores the concept of food literacy. Considering the lack of a shared understanding of food literacy, this study aims to explore food literacy’s domains, influential factors and determinants. Using a qualitative deductive-dominant content analysis, 30 experts from food-related fields were interviewed. The obtained outcomes were compared to available food literacy frameworks. Agreement among inter-raters was nearly perfect (k = 0.82). Yielding a total of 184 codes nested within 19 categories, identified domains were Origin, Safety, Choice and Decision, Select and Acquire, Plan, Preserve, Prepare, Cook, and Knowledge; influential factors included Nutrition, Psychological, Health, Learning Contexts, Policy, Industry, Sustainability, and Social and Cultural; External determinants were “Access to Food-Related Information”, “Perishable and/or Unreliable Food-Related Information”, “Family Dynamic and/or Identity”, and “Professionals’ Unpreparedness on Food-Related Expertise”, and Internal determinants included “Prioritise Food”, “Convenience and Practicality”, “Time and Financial Management”, “Previous Food-Related Habits”, and “Innate and Learned Flavour Preferences”. In conclusion, more than half of the identified attributes (62.5%) are corroborated by the current literature. However, the manifested content unmatched with the current frameworks of food literacy literature express food-literacy-related fields of action, knowledge, competencies, and determinants that have not yet been explored. As such, this study provides new and useful information concerning food literacy definition and development, by identifying its domains, factors of influence, and potential determinants. Moreover, this work paves the way for new measurements and interventions within this field.

Pursuing food systems' sustainability is crucial. Given the risk constituted by unhealthy diets, scarce research on food-related adjacent fields, and inconsistency across food literacy conceptualizations, this study aims to explore the constructs' definition and develop a conceptual and empirical framework of food literacy. A quantitative approach was taken on previously obtained qualitative outcomes from 30 interviews with experts from food-related fields. Food literacy was defined by a four-dimension model: Cooking Skills, Preserve and Analyse, Choice and Acquisition, Search and Plan. The framework Food Literacy Wheel integrates the construct definition, food literacy determinants (Internal, External) and influential factors (Nutritional, Psychological, Health, Learning Contexts, Policy, Industry, Sustainability, Social and Cultural). Allowing a broader perspective of food literacy within major food systems, this study contributes with new insights for future instruments and interventions, paving the way to develop/implement food literacy-related multi-sectorial and multilevel actions.

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ResumoObjetivo: Potencial moderador e mediador da eficácia nas intervenções para perda de peso bem-sucedida (PPBS), o suporte social é poucas vezes avaliado neste contexto. Pretende-se averiguar a relação entre a percentagem de peso perdido e variáveis sociodemográficas e psicológicas, incluindo satisfação com o suporte social, em pessoas que realizaram uma PPBS. Método: No total, 105 adultos com PPBS (ou seja, perda igual ou superior a 7% do peso inicial, com manutenção mínima de 12 meses) preencheram a Escala de Satisfação com o Suporte Social e um questionário para recolha de informação sociodemográfica, estado de saúde psicológica e estilos de vida. Resultados: O modelo estrutural com as dimensões de satisfação com a família e intimidade apresentou um bom ajustamento (χ 2 /gl = 1,343; CFI = 0,943; GFI = 0,924; RMSEA = 0,057, p < 0,001; C.I. 90% = ]0,000; 0,093[); a satisfação com o suporte familiar (β = 0,193; p = 0,081) e a existência de uma relação afetivo-sexual (β = -0,184; p = 0,082) foram as únicas variáveis a predizer marginalmente a percentagem de peso perdido. Conclusão: Participantes mais satisfeitos com o suporte familiar (no mínimo, um ano após a PPBS) perderam uma maior percentagem de peso; assim, a satisfação com suporte social da família poderá ser uma variável relevante no processo de perda de peso. Todavia, a natureza do estudo (tipo de estudo e de amostra) torna necessária mais investigação na área para confirmar este resultado.Palavras-Chave: perda de peso bem-sucedida, satisfação com o suporte social, satisfação com o suporte familiar Abstract Aim: As a potential moderator and mediator of the effectiveness of interventions for successful weight losses (SWL), which is rarely assessed in this context, we aimed to examine the relation between the percentage of weight loss and psychological and socio-demographic variables, including satisfaction with social support, in people who accomplished a SWL. Method: A total of 105 adults with a SWL (that is, a loss equal or superior to 7% of the initial weight, sustained for at least 12 months) filled the Satisfaction with Social Support Scale and a questionnaire, in order to collect socio-demographic, psychological health status and life style information. Results: The structural model with the dimensions of satisfaction with family support and intimacy present a good adjustment (χ 2 /gl = 1,343; CFI = 0,943; GFI = 0,924; RMSEA = 0,057, p < 0,001; C.I. 90% = ]0,000; 0,093[); satisfaction with family support (β = 0,193; p = 0,081) and the presence of a sexual-affective relationship (β = -0,184; p = 0,082) were the only variables to marginally predict the percentage of lost weight. Conclusion:The participants who were more satisfied with family support (at least one year after the SWL) lost a greater percentage of weight; therefore, satisfaction with family social support might be a relevant variable in the weight loss process. However, the nature of the study (type of study and sample) demands further research to corroborate this results.

Weight loss improves health but little is known regarding how those who achieve feel about it. Aiming to identify positive and negative consequences of a successful weight loss, 30 men and women who achieved a successful weight loss were interviewed. Interviews were analysed (content and thematic analysis). Inter-rater agreement was assessed. With multiple correspondence analysis, a three-factor model explained the associations between categories: (1) personal growth/social adversities, (2) body image/social benefits and (3) physical/emotional well-being. Successful weight loss has positive and negative consequences that need to be addressed; positive aspects (e.g. personal growth) and negative consequences (e.g. relational problems) need to be tackled.

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Dietary quality and sustainability are central matters to the international community, emphasised by the burden of the COVID-19 pandemic. To promote healthier and more sustainable food-related practices, the protocol of a web-based intervention to enhance adults’ food literacy is presented. The FOODLIT-Trial is a two-arm, parallel, experimental, and single-blinded randomised controlled trial delivered over 11 weeks. Based on the Food Literacy Wheel framework and supported by the Health Action Process Approach (HAPA) and the Behaviour Change Techniques Taxonomy, weekly content with customised behaviour change techniques (experimental group) is hypothesised to be more effective to promote food behaviour change when compared to a single-time and non-customised delivery of food-related international guidelines, with no theoretically informed approaches (comparison group). Primary outcome is food literacy, including food-related knowledge, skills, and behaviours, assessed with the FOODLIT-Tool; a secondary outcome includes psychological mechanisms that efficaciously predict change in participants’ food literacy, measured with HAPA-driven items. Enlisted through online sources, participants will be assessed across five time points (baseline, post-intervention, and 3-, 6-, and 9-month follow-ups, i.e., T0–T4). A randomisation check will be conducted, analyses will follow an intention-to-treat approach, and linear two-level models within- (T0–T4) and between-level (nested in participants) will be computed, together with a longitudinal mediation analysis. If effective, the FOODLIT-Trial will provide for a multidimensional and cost-effective intervention to enable healthier and more sustainable food practices over the long term.

Obesity implies risks for physical and psychological health, impacting negatively on self-esteem. As an improvement strategy, weight loss often has an impact not only on body image but also on others domains of self-concept. Despite the extensive research on physical self-concept, the exploration of others self-concept's domains concerning a weight loss is scarce. This study aims to explore the spontaneous self-concept of a successful weight loss. Thirty men and women who achieved a successful weight loss (loss at least 7% of the initial weight and made a minimum maintenance of 12 months) were interviewed. The in-depth audio-recorded interviews were transcribed and analysed through content and thematic analysis (pluralistic analysis with inductive and deductive approaches), by a jury of psychologists. A quantitative exploration of the association between the emergent categories was made through a multiple correspondence analysis. An inter-rater agreement (Cohen's k) was substantial (.734). Self-concept established a three-factor model: 1) Effective investment/Balanced self-esteem, 2) Ambivalent, and 3) Positive acceptance/Focused, entailed domains such as self-esteem, physical, social, and explicit personality self-concept. The qualitative exploration of self-concept on a weight loss context contributes to engrossing the current literature. Emphasising that not only physical but also psychological aspects may be impacted in a successful weight loss process, this study highlights that negative self-representations must be attended in a clinical interventions' context. Keywords: Successful Weight Loss, Self-Concept, Qualitative, Content Analysis, Thematic Analysis ___________________________________________________________________________ AUTO-CONCEITO ESPONTÂNEO NUMA PERDA DE PESO BEM-SUCEDIDA-ESTUDO QUALITATIVO PLURALISTARESUMO: A obesidade implica riscos para a saúde, afectando negativamente a auto-estima. Como estratégia de melhoria, a perda de peso impacta não só a imagem corporal como também outros domínios do auto-conceito. Apesar da extensa investigação sobre o autoconceito físico, a exploração de outros domínios do auto-conceito relativamente a uma perda de peso é escassa. Este estudo tem como objectivo explorar o auto-conceito espontâneo de uma perda de peso bem-sucedido. Trinta homens e mulheres que fizeram uma perda de peso bem-sucedida (perda mínima de 7% do peso inicial e uma manutenção mínima de 12 meses) foram entrevistados. As entrevistas foram gravadas em audio, transcritas e analisadas através da análise de conteúdo e análise temática (análise pluralista com abordagens indutiva e  Rua Jardim do Tabaco, 34, 1149-041 Lisboa, Portugal.