MASLD: Causes, Symptoms, Diet, Reversal and Natural Management

What Is MASLD?

Metabolic dysfunction-associated steatotic liver disease (MASLD) is a common form of chronic liver disease characterized by excessive fat accumulation in the liver in association with one or more cardiometabolic risk factors.

Thank you for reading this post, don't forget to subscribe!

The term MASLD replaced non-alcoholic fatty liver disease (NAFLD) as part of an international update in liver disease terminology introduced in 2023. Under the new definition, steatotic liver disease is classified as MASLD when hepatic steatosis is accompanied by at least one cardiometabolic risk factor, such as overweight or obesity, impaired glucose regulation or type 2 diabetes, elevated triglycerides, low HDL cholesterol, or hypertension. [1].

MASLD represents a spectrum rather than a single stage of disease. Some people have relatively simple liver fat accumulation, while others develop metabolic dysfunction-associated steatohepatitis (MASH), characterized by liver inflammation and hepatocellular injury. Persistent disease activity can contribute to fibrosis, cirrhosis and, in some individuals, hepatocellular carcinoma. However, progression is not inevitable, and early identification and management of metabolic risk factors can help reduce the risk of liver-related complications. [2].

Causes of MASLD?

MASLD is a result of complex event rather than from one isolated cause. Usually, MASLD develops through an interaction between metabolic dysfunction, insulin resistance, visceral obesity, abnormal lipid metabolism, diet, physical inactivity and genetic susceptibility.

Insulin Resistance: A Major Underlying Driver

Insulin resistance is one of the central metabolic mechanisms associated with MASLD. When tissues become less responsive to insulin, glucose and lipid metabolism become disrupted. Increased fatty-acid release from adipose tissue, altered hepatic lipid synthesis and impaired metabolic regulation can promote triglyceride accumulation inside liver cells. Persistent metabolic dysfunction may subsequently contribute to inflammation, hepatocellular injury and fibrosis. [2].

Visceral and Abdominal Obesity

Excess visceral fat is another important contributor. Visceral adipose tissue is metabolically active and can increase the flow of free fatty acids to the liver while contributing to inflammatory and insulin-resistant states. This helps explain why waist circumference and metabolic health can be important even in people who do not have obesity according to body mass index alone. [2].

Type 2 Diabetes and Abnormal Blood Lipids

Type 2 diabetes, prediabetes, elevated triglycerides, low HDL cholesterol and hypertension are important cardiometabolic risk factors associated with MASLD. The current EASL-EASD-EASO guidelines specifically incorporate these factors into the clinical definition and assessment of MASLD. [2].

Diet and Physical Inactivity

Dietary patterns and physical inactivity also influence MASLD risk. Diets characterized by excessive energy intake, high amounts of added sugars and highly processed foods may worsen metabolic health, particularly when they contribute to weight gain, insulin resistance or dyslipidemia. Physical inactivity can similarly contribute to metabolic dysfunction.

Other possible contributors include genetic susceptibility, certain medications and other medical conditions. Importantly, liver fat can have causes other than MASLD, including alcohol-associated liver disease and specific drug-related or metabolic disorders, so appropriate medical evaluation is important. [3].

Symptoms of MASLD

One of the major challenges of MASLD is that it can be silent. Many people have few or no symptoms and may discover the condition during routine blood testing or abdominal imaging. NIDDK notes that people with fatty liver disease may have no symptoms even when liver disease has progressed. When symptoms occur, tiredness or discomfort in the upper-right portion of the abdomen may be reported. [3].

As we know that, because symptoms may be absent, the absence of fatigue, abdominal discomfort or other symptoms does not necessarily mean that the liver is healthy. People with obesity, type 2 diabetes, metabolic syndrome, abnormal triglycerides or other cardiometabolic risk factors may require appropriate clinical assessment. Diagnosis may involve medical history, physical examination, blood tests, imaging and non-invasive assessment of liver fibrosis when indicated. [3].

Diet and Nutrition for MASLD

Diet is an important component of MASLD management because dietary habits influence body weight, insulin sensitivity, blood glucose, lipid metabolism and cardiovascular risk. However, there is no single food that cures MASLD. The overall dietary pattern, energy intake and long-term adherence are more important than individual “superfoods.”

A healthy liver diet can emphasize:

• Vegetables and salads
• Whole fruits in appropriate portions
• Whole grains
• Legumes and pulses
• Nuts and seeds
• Fish and other appropriate protein sources
• Low-fat or unsweetened dairy options where appropriate
• Unsaturated fats such as those from nuts, seeds and plant oils

Replacing saturated and trans fats with healthier unsaturated fats can support overall cardiometabolic health. NIDDK also recommends choosing lower-glycemic foods and reducing foods and beverages containing large amounts of simple sugars, particularly fructose-containing sweetened beverages. [4].

Mediterranean-Style Eating Pattern

A Mediterranean-style dietary pattern is frequently recommended as a practical approach for improving overall diet quality. It generally emphasizes vegetables, fruits, whole grains, legumes, nuts, seeds, fish and unsaturated fats while limiting highly processed foods, excess saturated fat and added sugars.

The EASL-EASD-EASO guidelines emphasize improving dietary quality and reducing excessive intake of energy-dense foods, sugar-sweetened beverages and foods rich in saturated fat. [2].

Portion size also matters. Even healthy foods can contribute to excessive calorie intake when consumed in large quantities.

MASLD Foods to Avoid or Limit

There is no need for an extreme elimination diet. Instead, focus on reducing foods and beverages that can worsen overall metabolic health.

Consider limiting:

• Sugar-sweetened soft drinks
• Sweetened juices and other sugary beverages
• Excess sweets, cakes and desserts
• Highly refined carbohydrates
• Ultra-processed foods
• Foods high in saturated fat
• Trans-fat-containing foods
• Frequent high-calorie snacks
• Very large portions
• Excessive alcohol intake

Particular attention should be given to sugar-sweetened beverages. NIDDK recommends avoiding foods and drinks containing large amounts of simple sugars, especially fructose-containing beverages such as sweetened soft drinks, sports drinks and sweetened teas. [4].

Can MASLD Be Reversed?

The term “reversed” should be used carefully. MASLD can improve substantially in many people, especially when identified early and associated metabolic abnormalities are effectively addressed. Reduction in liver fat can occur with weight loss, improved diet and increased physical activity.

For people with overweight or obesity, gradual weight loss can reduce hepatic fat. NIDDK reports that losing at least 3-5% of body weight can reduce liver fat, while greater weight loss around 7-10% in some individuals may be required to improve liver inflammation and fibrosis. [4].

Importantly, physical activity may provide benefits even when substantial weight loss does not occur. [4].

However, the extent of recovery differs significantly among participants. People with significant fibrosis or cirrhosis require appropriate medical evaluation and monitoring. Lifestyle modification should therefore be considered part of a comprehensive management strategy rather than a substitute for medical care.

How to Manage MASLD Naturally

There is no single natural remedy proven to eliminate MASLD. The most evidence-supported natural approach involves sustainable improvements in metabolic health, diet, physical activity and weight management.

1. Aim for Healthy Weight Management

If you have overweight or obesity, gradual weight loss can reduce liver fat and improve several metabolic risk factors. Avoid crash diets and very rapid weight-loss approaches. Sustainable changes are generally more appropriate for long-term management. [4].

2. Exercise Regularly

Regular physical activity is an important component of MASLD management. Aerobic activities such as brisk walking, cycling and swimming can be combined with resistance training according to individual fitness and medical status. Exercise can improve metabolic health even when it does not produce substantial weight loss.

3. Improve Overall Food Quality

Build meals primarily around vegetables, whole grains, legumes, appropriate protein sources, nuts, seeds and unsaturated fats. Reducing highly processed foods can make it easier to control both dietary quality and calorie intake.

4. Reduce Added Sugars

One practical starting point is to replace sugar-sweetened beverages with water or unsweetened drinks. Reducing added sugars can help improve overall dietary quality and metabolic health.

5. Manage Blood Glucose, Blood Pressure and Lipids

MASLD is closely associated with cardiometabolic disease. Appropriate management of diabetes or prediabetes, hypertension and abnormal cholesterol or triglyceride levels is therefore an important part of comprehensive care. [2].

6. Reduce Sedentary Time

Regular movement throughout the day can complement planned exercise. Avoiding prolonged periods of sitting and incorporating more daily physical activity can support overall metabolic health.

7. Be Cautious With Supplements

“Natural” does not automatically mean safe for the liver. Some herbal products and dietary supplements have been associated with liver injury. People with MASLD should discuss supplements, herbal preparations and complementary treatments with a qualified healthcare professional before using them.

MASLD and MASH: What Is the Difference?

MASLD describes steatotic liver disease associated with cardiometabolic dysfunction, whereas MASH refers to the form in which liver steatosis is accompanied by inflammation and hepatocellular injury.

MASH is clinically important because persistent inflammation and injury can promote liver fibrosis. Over time, advanced fibrosis may progress to cirrhosis and increase the risk of liver-related complications. Nevertheless, not every person with MASLD develops MASH or advanced fibrosis. [2].

When Should You See a Doctor?

Because MASLD can have few or no symptoms, medical assessment is particularly important if you have risk factors such as:

• Overweight or obesity
• Type 2 diabetes or prediabetes
• High triglycerides
• Abnormal cholesterol
• High blood pressure
• Metabolic syndrome
• Evidence of fatty liver on imaging
• Persistently abnormal liver enzymes

Healthcare professionals may assess metabolic risk factors and determine whether additional testing for liver fibrosis is appropriate. Blood-based scores and non-invasive tests can be used in appropriate patients to help identify those at increased risk of advanced liver disease. [2].

The Bottom Line

MASLD is more than simply excess fat in the liver. It is closely connected with insulin resistance, visceral obesity, type 2 diabetes, abnormal lipid metabolism, hypertension, physical inactivity, dietary patterns and genetic susceptibility. Among these factors, metabolic dysfunction particularly insulin resistance and associated abnormalities in glucose and lipid metabolism is a major underlying driver.

The positive news is that MASLD can improve substantially in many people. A balanced diet, appropriate weight management and regular physical activity may improve other aspects of liver disease.

If you have been diagnosed with MASLD, particularly if you have diabetes, obesity or other metabolic risk factors, discuss your condition with a qualified healthcare professional. Appropriate assessment can help determine the severity of liver disease and whether further evaluation for fibrosis is required.

References

1. Rinella ME, Lazarus JV, Ratziu V, et al. A multi-society Delphi consensus statement on new fatty liver disease nomenclature. Journal of Hepatology. 2023;79(6):1542-1556.
2. Tacke F, Horn P, Wong VWS, et al. EASL–EASD–EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD). Journal of Hepatology. 2024;81(3):492-542.
3. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Symptoms & Causes of NAFLD & NASH. National Institutes of Health.
4. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Treatment for NAFLD & NASH. National Institutes of Health.