Forensic Medicine The earliest markers of renal injury in lead poisoning is the:- A Elevated lead level in urine B Elevated free protoporphyrin in urine C Elevated b 2 microglobulin in urine D Elevated coproporphyrin in urine 💡 Explanation The earliest markers of renal injury in lead poisoning is the:- ✓ Correct Answer: C. Elevated b 2 microglobulin in urine