On admission [8.51 (6.53‐10.22) ng/mL vs 4.25 (2.57‐6.31) ng/mL, P < 0.001] and Day 3 [9.31 (7.92‐10.98) ng/mL vs 3.32 (2.25‐5.13) ng/mL, P < 0.001] and Day 7 [4.96 (3.28‐7.26) ng/mL vs 2.27 (1.55‐3.24) ng/mL, P < 0.001] postpoisoning, serum UCH‐L1 concentration was significantly higher in patients that developed cognitive impairment compared to those that did not. The gene discussed is UCHL1; the disease is Cognitive impairment.