RMBIO FBS is sourced from USDA-approved suppliers within the U.S. and is processed in our cGMP-compliant, ISIA traceability certified, and FDA-registered facility. RMBIO FBS is processed under strict protocols that ensure sterility, high quality, and excellent growth-promotion and performance over a range of applications and cell lines. The average endotoxin level is < 1 EU/mL, the average hemoglobin level is < 15 mg/dL, and the total protein specification is 3.0-4.5 g/dL. All lots of FBS are triple 0.1 µm sterile filtered and 9CFR-tested. Product should be stored at ≤ -10° C.