A Study of MK-3655 in Individuals With Pre-cirrhotic Nonalcoholic Steatohepatitis (NASH) (MK-3655-001)

Open to people ages 18-80

1. Has histological confirmation of NASH
2. Is a male or female aged 18 years to 80 years (in Japan and Taiwan aged 20 to 80 years)

3. Has a body mass index (BMI) ≥25 kg/m² and ≤50 kg/m² and stable weight for the past 3 months

4. Has no history of Type 2 diabetes mellitus (T2DM) OR a history of T2DM controlled by diet or stable doses of antihyperglycemic agents (AHAs)
5. Contraceptive use by male participants should be consistent with local regulations.
6. A female participant is eligible to participate if she is not pregnant or breastfeeding, and she is not a woman of child-bearing potential (WOCBP) OR she is a WOCBP and uses a contraceptive method that is highly effective during the intervention period and for at least 16 weeks after the last dose of study intervention.

1. Has presence of cirrhosis on liver biopsy
2. Has Type 1 diabetes
3. Has a history of malignancy, unless cancer free ≥5 years, or is under evaluation for active or suspected malignancy except for adequately treated basal cell or squamous cell skin cancer or in situ cervical cancer
4. Has a history of bariatric surgery ≤5 years before study participation
5. Has undergone a major surgical procedure ≤3 months before study participation or has major surgery planned during the study
6. Has a history or evidence of chronic liver disease other than NASH. Individuals with a history of Hepatitis B or C may be eligible for participation.
7. Has significant systemic or major illnesses other than liver disease, including recent events (≤6 months before study entry) of congestive heart failure, unstable coronary artery disease, arterial revascularization, pulmonary disease, renal failure, stroke, transient ischemic attack, or organ transplantation