The purpose of the study is to assess the safety and tolerability of ALT-801 in diabetic and non-diabetic subjects with overweight and obese and non-alcoholic fatty liver disease (NAFLD).

This is a Phase 1, multicenter, randomized, double-blind, placebo-controlled study to assess the effects of ALT-801 the safety of ALT-801and effects on hepatic fat fraction, anthropometric parameters, lipid metabolism, inflammatory markers and fibrosis markers in diabetic and non-diabetic overweight and obese (BMI 28.0-45.0 kg/m2) subjects with NAFLD.

Inclusion Criteria:

• Written informed consent signed prior to the performance of any study procedures
• Male or female volunteers, age 18 to 65 years, inclusive
• Overweight to obese (greater than or equal to BMI 28.0
• Magnetic resonance imaging derived proton density fat fraction (MRI-PDFF) ≥ 10%
• If subject has Type 2 diabetes mellitus (T2DM), on stable regimen, for at least 3 months prior to screening, of any combination (1) diet and exercise, (2) metformin with absent or mild gastrointestinal symptoms (nausea, vomiting or diarrhea), and/or (3) sodium glucose cotransporter-2 (SGLT-2) therapy

Exclusion Criteria:

• Women who are pregnant or breastfeeding
• Type 1 DM and/or insulin-dependent T2DM, or uncontrolled T2DM defined as HbA1c ≥ 9.5%
• History of pancreatitis or hypersensitivity reaction to GLP-1 analogues