Recombinant Human GM‑CSF for Injection is a biopharmaceutical protein used to accelerate white‑blood‑cell recovery in patients undergoing chemotherapy, bone‑marrow transplantation, and immune‑modulation therapies. The Recombinant Human GM‑CSF for Injection market size was valued at approximately USD 1.03 billion in 2024, and the market forecast projects it to reach USD 1.68 billion by 2033, delivering a CAGR of about 5.2% over the 2026‑2033 horizon. This growth outlook reflects expanding clinical indications, heightened adoption of supportive‑care regimens, and a wave of biosimilar entrants that are broadening access worldwide. The scope of this analysis covers all commercially available recombinant GM‑CSF injectable formulations, including sargramostim, molgramostim, and pegylated variants, across therapeutic, oncology, and transplant applications.