In the quantitative analysis of animal studies, ginger improved liver levels of the following:

Ginger also improved serum levels of the following:

ALT (−2.85 U/L)
AST (−0.98 U/L)
Catalase (+3.35 nmol/mg),
Fasting blood sugar (−2.53 mg/dL)
HDL-C (+1.27 mg/dL)
LDL-C (−3.94 mg/dL)
Malondialdehyde (−3.16 nmol/L)
Superoxide dismutase (+3.01 U/mg),
Triglycerides (−4.98 mg/dL)
Total cholesterol (−3.35 mg/dL)

The qualitative analysis of 3 clinical trials in humans found the following:

Ginger and liver health Original paper