The Role of Phytogenics in Pig Production and Their Proposed Association with the Circular Economy and Life Cycle Assessment: A Narrative Review and Conceptual Framework
The intensification of global pig production has increased the pressure to reconcile productivity with animal health, food safety, and environmental sustainability. Phytogenic feed additives (PFAs)—plant-derived compounds including essential oils, oleoresins, phenolics, and polyphenol-rich extracts—have emerged as cand...