(1) Background: VALUEWASTE, a European Commission Horizon 2020 project, is attempting to find new and sustainable sources of protein and fertiliser products using biowaste as a resource. Introducing these products to the market is essential to understand the social acceptance, behavioural changes and socioeconomic impacts related to products and value chains. (2) Methods: The applied framework provides insights from market, socioeconomic, and community acceptance points of view. Initially, we designed the context and targets of the study. The acceptance levels were tested in two study regions: the cities of Murcia (Spain) and Kalundborg (Denmark). Secondly, we established a survey questionnaire (N = 523) combining social acceptance and life-cycle assessment methodology questions. Lastly, we performed a scenario-based workshop discussing behavioural changes related to the introduction of new bio-products to customers. (3) Results: Our study of developing new bio-products (food, feed, fertiliser) from biowaste produced forceful comparative results from the two regions regarding three aspects of social acceptance: market, socioeconomic, and community. (4) Conclusions: The present study, engaging citizens, consumers, producers, and policy makers, provides insights into what is important for the social acceptance of new protein sources for food, feed, and recycled fertilisers from bio-waste in the Murcia and Kalundborg city regions. Our observations, based on analyses applying three dimensions of social acceptance, can be directly applied elsewhere, guiding decision makers on how to fortify social acceptance regarding new circular economy business models and the bioeconomy in Europe.

Food loss poses multifaceted challenges for environmental sustainability, food security, and economic efficiency across agri-food systems. This study explores the spatially interrelated dimensions of food loss in the Finnish strawberry value chain, highlighting the intricate interactions and dynamics among various stakeholders and processes. It examines how multiple actors are embedded in regional agro-economies and the socio-material tensions that influence their practices. While each entity holds a different position within the system, they collectively confront a common challenge: the complex, interdependent nature of the Finnish strawberry value chain, which shapes their roles and strategies for addressing food loss. The study employs a qualitative, multi-scalar case study design of the North-Karelian strawberry value chain, grounded on semi-structured interviews, document analysis and field observations. The paper provides a nuanced understanding of how various institutional, infrastructural, and temporal complexities influence food loss outcomes. It highlights how these factors can either hinder or facilitate the advancement towards zero-loss agriculture trajectories. By providing a spatially sensitive perspective on economic stakeholder engagements, it highlights bottlenecks and offers potential solutions to effectively reduce food loss. The case illustrates how active engagement with these complexities is required to create strategic opportunities to develop more sustainable strawberry value chains that align with EU policy goals.