The investigators therefore speculate that testosterone replacement in men with NAFLD and low blood testosterone levels will reduce liver fat. Investigators will study 10 men with NAFLD and some inflammation or scarring (proven on liver biopsy performed for clinical diagnosis) and who have mildly reduced testosterone levels. Investigators will see if giving a 12 month course of Testosterone Replacement Therapy (TRT) to these men will lessen the severity of their liver damage.