Non-alcoholic fatty liver disease (NAFLD) is a condition that occurs when fat accumulates in the liver from causes other than excessive alcohol consumption, and it is associated with a number of poor health outcomes. An analysis of data concerning 72,092 women under the age of 40 found that those with long or irregular periods were 49% more likely to develop NAFLD over the following four to five years. Journal of Clinical Endocrinology and Metabolism, March 2022