Granulocyte Colony-Stimulating Factor (G-CSF) is a cytokine that plays a central role in neutrophil proliferation, differentiation, and mobilization. Clinically, recombinant G-CSF is widely used to manage chemotherapy-induced neutropenia and support hematopoietic stem cell mobilization. However, dysregulated G-CSF signaling is increasingly implicated in autoimmune disorders, chronic inflammation, and cancer progression, where elevated G-CSF levels promote myeloid-derived suppressor cell expansion, angiogenesis, and tumor immune evasion. Catalina’s high-quality G-CSF antibodies provide robust specificity and sensitivity for reliable detection of endogenous and recombinant G-CSF, supporting advanced research in cancer biology, immunology, hematology, neuroscience, and translational medicine.