Fatty liver disease — often called NAFLD or, in its more advanced form, MASH — has become one of the most common chronic liver conditions, and it frequently develops quietly alongside insulin resistance, type 2 diabetes, and stubborn weight gain. This section is for readers trying to make sense of a recent diagnosis, an abnormal liver enzyme result, or lingering questions about how metabolism and liver health are connected. You'll find clear, clinically grounded explanations of what's happening inside the body, why it matters beyond the liver itself, and the lifestyle and metabolic factors that shape the condition over time.