The earliest markers of renal injury in lead poisoning is the:-
Elevated urinary levels of N-acetyl-3-D-glucosaminidase and b-2-microglobulin may serve as early markers of renal injury.
Elevated lead level in urine
Elevated free protoporphyrin in urine
Elevated b 2 microglobulin in urine
Elevated coproporphyrin in urine
Toxicology - 1