Thin But Not Healthy: Why Fatty Liver Is Rising in Slim Indians

When most people hear the words “fatty liver,” they immediately imagine someone who is overweight. 

That association makes sense. 

Excess body fat, insulin resistance and metabolic problems are important risk factors for fatty liver disease.

But there is a problem with assuming that body weight tells us the whole story.

You can be thin and still have fat accumulating inside your liver. 

And for Indians, this is a particularly important conversation.

I have seen people who look perfectly lean from the outside, have a relatively normal body weight and still have metabolic problems that you would not expect from their appearance. This is one of the reasons I keep saying that a weighing scale cannot tell you everything about your health. 

Your body can look lean while your metabolism is struggling underneath. 

A 2022 review on NAFLD in normal weight individuals highlighted exactly this issue. Fatty liver can develop in people who do not have obesity, and being lean does not automatically protect someone from inflammation, fibrosis or progression of liver disease.

In fact, the problem may be particularly relevant in Asian populations.

For Asian populations, a BMI below 23 kg/m² is commonly used to define normal weight because metabolic complications such as visceral fat accumulation and type 2 diabetes can occur at lower BMI levels than in many European populations. The same review found that some of the highest reported prevalences of NAFLD among normal-weight populations came from India.

So let's ask the obvious question: "How can someone who isn't overweight develop fatty liver?" 

The first thing we need to understand is that the fat you can see isn't the only fat that matters. 

Visceral fat is the fat stored around internal organs including within the abdominal region. Someone can have relatively slim arms and legs but still carry more visceral fat than you would expect from their appearance.

This is one reason I don't like using the phrase “thin equals healthy.”

You can be thin because you don't carry a lot of total body fat. But that doesn't automatically mean you have good insulin sensitivity, good blood glucose control or a healthy amount of fat stored inside your organs.

And the liver is one of the organs where excess fat can become particularly important.

Think about the typical Indian diet.

I'm not saying Indian food is unhealthy. It's far from it. 

Traditionally, Indian diets consisted of a variety of healthy food items but modern eating habits can be a huge deviation in comparison!

The main portion of the food intake could be covered with refined carbs. When we add sugary drinks, sweets, desserts, convenience foods and frequent eating out to the mix, it’s apparent how different the total calorie load might be.

Research on lean NAFLD suggests several factors behind the phenomenon, such as the nature of the diet, lifestyle, genetic predisposition, hormonal influences, and metabolic disorders. 

One of the areas that should be fully considered is excessive consumption of sugar and refined carbs. 

And if you're wondering where your own weight and diet stands, this is a good place to start. You can fill out the form below to get a personalised diet plan based on your goals and nutritional needs.

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Now, let’s take an example.

There were studies showing that the use of sugar-sweetened beverages was linked to suffering from NAFLD, while the impact of consuming excess amounts of fruit sugars on the fat accumulation in the liver and metabolic disorders is also investigated. Still, this does not mean that anyone who eats, for example, a mango or a banana will be on the verge of becoming а fatty liver owner.

Therefore, let’s not make nutrition something to be afraid of, and pay attention to the general picture instead. 

When refined carbohydrates, sugary drinks, sweets and processed items dominate your diet at the expense of adequate protein, fiber, and whole foods, fatigue and metabolic stress follow.

There is another factor we need to talk about. Physical activity.

You can be thin and sedentary. And this is something that gets missed all the time. Someone may say, “But I'm only 58 kilograms.” 

My next question might be: “How much muscle do you have?”

Because body weight alone doesn't tell me whether you're physically fit, metabolically healthy or carrying a healthy amount of lean mass.

Muscle is an important tissue for glucose disposal. When you move and train your muscles, they use glucose for energy and storage. So if someone has little muscle, does very little physical activity and eats a diet dominated by refined carbohydrates, their body composition and metabolic health may be very different from what their weight suggests.

This is why I want us to move away from the idea that health is simply about being thin.

Thin is a body size. Being healthy is a physiological state. 

Those aren't the same thing. And fatty liver can be a good example of that difference.

Another important point is that fatty liver can be remarkably silent.

• You may not feel anything.

• You may have no pain.

• You may exercise occasionally.

• You may look completely healthy.

And you may still have fat accumulating in your liver.

The review of normal weight NAFLD specifically notes that the disease can remain clinically silent, meaning that lean individuals may not be screened because they don't appear to have obvious risk factors.

That is one of the reasons I think we need to stop waiting for someone's body to look unhealthy before taking metabolic health seriously.

• Your waist circumference can tell us something.

• Your blood pressure can tell us something.

• Your fasting glucose and HbA1c can tell us something.

• Your triglycerides and cholesterol profile can tell us something.

And when there is a clinical reason to investigate the liver, appropriate liver tests and imaging can provide additional information.

None of these should be interpreted in isolation.

But together, they can give us a much better picture than a weighing scale ever could.

There is an important differentiation with regard to terminology as well. 

You must have heard the acronym NAFLD, which stands for “non-alcoholic fatty liver disease”, quite a few times in this article by now.

There have been changes in the terminology employed in the area over time. According to the newer classifications, the emphasis in naming the disease has shifted from the absence of alcohol to the emphasis made on metabolic dysfunction of the affected person. I do not want you to get lost in terms and terminologies used. 

The most pertinent question is: “What is the reason for fat deposits in the liver and how the metabolic condition of a person has developed?”

Because the causes can differ from person to person.

• Genetics can play a role.

• Diet can play a role.

• Physical inactivity can play a role.

• Insulin resistance can play a role.

• Visceral fat can play a role.

Certain medications and medical conditions can also contribute to liver fat.

And in some lean individuals, we simply don't have all the answers yet.

That last point is important. 

We should not pretend that every case of fatty liver in a thin person has the same explanation.

It doesn't.

This is why medical assessment matters.

Now, what can you actually do? The answer is not to start starving yourself.

If you're already lean, losing more weight may not be the appropriate goal.

Your goal should be improving metabolic health and body composition.

Let us start with your eating habits.

• Try to decrease your reliance on drinks that are high in sugar, snacks and processed foods.

• Try to consume meals that are made from foods that are raw or minimally cooked.

• Make sure to have a lot of sources of proteins in your meals.

• Remember to incorporate a lot of fiber in your diet.

Watch how much you eat; but do not assume that “healthy” means you can eat anything.

Remember that there is a difference in terms of the quality of carbohydrates you are eating.

Eating dal with vegetables and a moderate portion of rice is different from living on candy and chips.

After changing your diet, start exercising.

• Walking is a great way to start moving.

Sleep matters too.

Poor sleep can affect appetite, glucose regulation, recovery and physical activity.

And chronic stress shouldn't be ignored either.

Metabolic health isn't controlled by one food or one workout.

It's the result of your overall lifestyle.

I deem it necessary to elaborate on the question of Indian health.

For many years we have discussed obesity as if it were the only visible symptom of metabolic risk.

In reality, India is characterized by a different metabolic state. It is possible that people do not seem to be overweight at all but suffer from diabetes, hypertension, dyslipidemia, and fatty liver.

Consequently, the prevention approach must be broader than just the weight check. In addition, it has to imply that parents should consider a distinct way of thinking of their children.

If one person looks thin, that does not necessarily mean that their nutrition is fine. 

It is possible to be slim by consuming a lot of refined carbohydrates and sugary drinks mixed with little physical activity.

Likewise, a person should not believe that their metabolic health remains unchanged, simply because they have been 150 pounds for 20 years.

• Your body composition can change.

• Your muscle mass can change.

• Your visceral fat can change.

• Your blood glucose can change.

• And your liver can change.

The number on the scale may barely move.

That is why I want you to stop asking only: “Am I overweight?”

Start asking: “Am I metabolically healthy?” 

Those are two very different questions.

And if you are someone who has always been thin, don't take this article as a reason to become anxious about your liver.

That isn't the message. The message is awareness.

If you have risk factors, abnormal blood tests, a family history of metabolic disease or other clinical concerns, talk to your doctor about whether you need evaluation.

Don't diagnose yourself from an internet article. And don't assume that because you look thin, everything inside your body must be fine.

At the same time, don't become obsessed with trying to eliminate every carbohydrate or every gram of fat.

Your liver doesn't need another extreme diet.

• It needs a sustainable lifestyle.

• A nutritious diet.

• Adequate protein and fiber.

• Regular physical activity.

• Healthy body composition.

• Good sleep.

And appropriate medical monitoring when needed. 

Because here's the part I really want you to remember.

You don't have to look overweight to have metabolic problems. And you don't have to wait until your body looks unhealthy before you start taking your metabolic health seriously.

The liver doesn't care what your weighing scale says. The liver responds to your overall metabolic environment.

So the next time someone tells you, “You're thin, you're healthy,” don't necessarily accept that as the full story. 

• Look beyond appearance.

• Look at your waist.

• Look at your strength.

• Look at your activity.

• Look at your blood pressure.

• Look at your blood glucose.

• Look at your diet.

And when appropriate, look at your liver health too.

Because sometimes the most important health problems are the ones you can't see in the mirror.

Being thin may tell you what your body looks like. 

It doesn't necessarily tell you what's happening inside it. 

A qualified dietitian or nutritionist can look at your health, lifestyle, food preferences, sleep goals and nutritional needs and help build a plan around you, rather than asking you to fit into a generic diet.

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