Recent Advances in Protein Extraction Techniques for Meat Secondary Streams

Meat secondary streams command low value along the meat value chain, with a significant portion of these exiting the food value chain and contributing to global food loss and waste. Valorizing these substantial secondary streams through the efficient extraction of high-biological-value proteins could translate into significant social, economic, and environmental benefits. Protein extraction from meat secondary streams offers a promising approach to enhance their nutritional and commercial value while supporting global food security initiatives. This approach could also help to distant these by-products from their original source, making them more appealing to consumers. The current review evaluates the protein content and valorization potential of meat secondary streams from various animal sources. It further provides a critical assessment of both traditional and emerging protein extraction techniques, highlighting their advantages, limitations, and applications. Existing knowledge gaps are also identified to guide future research. This review aligns the role of protein recovery technologies with the UN’s Sustainable Development Goal target 12.3, which seeks to halve global food waste by 2030.