The study of selenium's role in circular agriculture is crucial for developing policies and practices that enhance farm productivity and ensure ecological and economic sustainability in global agriculture. Integrating selenium into circular farming systems presents a significant opportunity to move towards agricultural sustainability while maximizing economic returns. Moreover, selenium's effectiveness in enhancing crop resilience against environmental stressors, coupled with its essential role in fulfilling dietary needs, underscores its importance in developing sustainable, closed-loop agricultural systems. Circular farming is an agricultural approach that prioritizes resource efficiency by reusing waste materials, recycling nutrients, and reducing reliance on external inputs. Unlike traditional linear farming, which often leads to resource depletion and waste, circular farming creates closed-loop systems where animal manure, crop residues, and organic waste are cycled back into production. This integrative approach aligns with SDG 1, SDG 2, SDG 3 and SDG 8 by merging environmental stewardship with economic viability, offering a compelling model for future farming systems. This model supports soil health, conserves water, and minimizes environmental impact, promoting sustainability. This strategic integration can pave the way for more resilient farming practices that benefit farmers and consumers alike, aligning economic growth with ecological balance.