What causes NAFLD?

    Written by:
    Last Updated: May 16, 2025

    Nonalcoholic fatty liver disease is caused by an imbalance in liver energy metabolism in which excess energy intake leads to triglyceride accumulation. Key contributors to its development include overnutrition, sedentary lifestyle, genetics, aging, fat tissue dysfunction, gut dysbiosis, and insulin resistance.

    NAFLD reflects an imbalance of energy metabolism in the liver: more energy enters the liver than it can dispose of, resulting in a net accumulation of energy as triglycerides.[1] Overnutrition and sedentary behavior primarily lead to the development of NAFLD, but there are a variety of other factors that further influence the development and progression of the disease, including genetics, aging, fat tissue dysfunction, gut dysbiosis, and insulin resistance.[2][3]

    Causes of NAFLD

    image

    Adapted from Stefan, Häring & Cusi, 2019[3]

    What causes NAFLD? - Examine