Hybrid food design as a way to enhance the nutritional and functional properties of animal-based products.
This chapter examines hybrid food systems as a strategic response to the challenges of rising global protein demand, population aging, environmental constraints, and changing dietary expectations. Hybrid foods, defined as formulations combining animal-derived ingredients with plant, fungal, insect, or other novel protein sources, are presented as a pragmatic pathway to reconcile nutritional adequacy, technological functionality, sustainability, and consumer acceptance within the ongoing protein transition. The chapter reviews the wide range of raw materials used in hybrid food design, emphasizing their complementary roles. Plant and fungal ingredients contribute dietary fiber, bioactive compounds, and reduced environmental impact, while animal-derived components ensure high-quality protein, essential micronutrients, and techno-functional properties. These combinations enable nutritionally complete products while promoting resource efficiency and circularity through the valorization of underutilized by-products. Processing technologies are identified as central to hybrid food performance. Conventional and emerging processes, such as mixing, cooking, extrusion, non-thermal treatments, and 3D food printing, govern structure, sensory quality, digestibility, and nutrient bioavailability by shaping interactions between heterogeneous protein sources. Evidence reviewed in the chapter indicates that well-designed hybrid matrices can maintain, or even enhance, protein digestibility and mineral bioavailability compared to purely animal- or plant-based products. The chapter further addresses health implications, consumer acceptance, and environmental performance. Hybrid foods can reduce saturated fat intake and environmental footprints while maintaining sensory appeal, particularly for flexitarian consumers. Life cycle assessments and market analyses suggest that hybrid foods align with dietary guidelines and sustainability policies, positioning them as a scalable and socially acceptable lever for future food systems.