Inclusion Criteria:  Male or female volunteers aged ≥18 to ≤80 years at the date of signing the informed consent. Willingness and ability to provide written, personally signed, and dated informed consent, in accordance with the latest ICH Good Clinical Practice (GCP) Guidelines and applicable regulations. An understanding, ability and willingness to fully comply with project procedures and restrictions.  For PART B only:  1. With a known history of NAFLD as evidenced either of:  GP diagnosis on HCF Documented Fibroscan or liver US demonstrating NAFLD  Exclusion Criteria:  Known alcoholic liver disease, history of cirrhosis of any other cause (metabolic, viral hepatitis or other) Any other significant previous liver pathology (liver malignancy, portal hypertension, infiltrative liver disease) Alcohol consumption >30 units per week An Implanted cardiac devices