There’s a question I’m asked fairly often in the clinic—usually by someone who has just discovered a family history of liver disease. “If it runs in my family, is it inevitable?”
The short answer is no. Genetics may set the stage, but they don’t always determine the outcome. There is no single gene that determines disease risk; it is usually a combination of genes, and when they interact with a conducive environment, the risk becomes more significant.
In hepatology, we see this play out in different ways. Two people from the same family, with similar genetic risk, can have very different liver health depending on how they live. One develops fatty liver in their 30s, the other maintains a largely healthy liver well into later life. The difference, more often than not, comes down to everyday habits.
Take non-alcoholic fatty liver disease, which is now one of the most common liver conditions we see. There is a genetic component—some individuals are more prone to storing fat in the liver. That tendency doesn’t act in isolation—it’s shaped quite a bit by how someone lives day to day. Long periods of inactivity, frequent processed foods, and erratic eating habits can push things in the wrong direction. On the flip side, keeping active, eating more balanced meals, and managing weight—even to a small extent—can help steady things, and in the early stages, sometimes even turn it around.
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Alcohol-related liver disease follows a similar pattern. Not everyone who consumes alcohol develops liver damage at the same rate. Genetics can influence susceptibility, but patterns of drinking—how much, how often, and over how many years—remain critical. The idea that someone is 'genetically protected' is often misleading. Given enough exposure, the liver is likely to be affected.
What is sometimes overlooked is the role of metabolic health. Problems like diabetes, high cholesterol, and excess weight tend to put extra strain on the liver. If someone already has a genetic tendency, that combination increases the risk further. But when these conditions are kept under good control, it does ease some of that pressure on the liver.
That said, it’s important to be realistic. Lifestyle cannot change everything. Certain inherited liver diseases will still require medical monitoring and, in some cases, treatment. But even in these situations, lifestyle choices can influence how early the disease appears and how quickly it progresses.
What I usually tell patients is this: you may not be able to change your genes, but you can change the environment in which those genes operate. And that matters more than people often think.
From a clinical standpoint, the goal is not perfection. It’s consistency—eating in a way that supports metabolic health, staying physically active, limiting alcohol, and addressing risk factors early. These are not dramatic interventions, but over time, they have a meaningful impact. So, can you outrun your genes? Perhaps not entirely. But in many cases, you can stay a few steps ahead.
(The author is a consultant hepatologist, Gleneagles BGS Hospital, Kengeri, Bangalore)
The opinions expressed in this article are those of the author and do not purport to reflect the opinions or views of THE WEEK.
