HEALTHY AGING, HEALTHY LIVING SERIES

How obesity, diabetes, alcohol and medications affect liver health—and practical ways to protect this vital organ as you age

By: Dr. Avi Verma

Your liver works continuously to keep your body healthy. It processes nutrients, regulates metabolism, produces essential proteins, helps digest fats and breaks down medications and harmful substances. Yet liver disease often develops silently, without noticeable symptoms until significant damage has occurred. Fatty liver disease is increasingly common and closely associated with obesity, Type 2 diabetes, insulin resistance and alcohol consumption. In our previous installments of Healthy Aging, Healthy Living, we explored brain health, bone strength and fall prevention, diabetes and prediabetes, and kidney health. This week, we examine fatty liver disease, its risk factors and practical ways to protect liver health as we age.

Understanding Fatty Liver Disease

Fatty liver disease develops when excess fat accumulates in liver cells. It is broadly classified into two categories:

• Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD): Formerly known as Non-Alcoholic Fatty Liver Disease (NAFLD), it is associated with obesity, Type 2 diabetes, high blood pressure, abnormal cholesterol and insulin resistance.
• Metabolic Dysfunction-Associated Steatohepatitis (MASH): A more serious form of MASLD involving liver-cell injury and inflammation. It can progress to fibrosis (scarring), cirrhosis and, in some cases, liver cancer.
• Alcohol-Associated Liver Disease (ALD): Caused by excessive or prolonged alcohol consumption, it can progress from fat accumulation to inflammation, scarring and advanced liver disease.

Some individuals have both metabolic risk factors and significant alcohol exposure. This overlapping condition is known as Metabolic Dysfunction and Alcohol-Associated Liver Disease (MetALD).

The Connection Between Obesity and Diabetes

The liver plays a central role in the body’s metabolic system. When metabolism becomes disrupted, excess fat can accumulate in the liver and trigger inflammation.

Insulin resistance: When the body’s cells do not respond effectively to insulin, as commonly occurs in Type 2 diabetes, the liver may produce and accumulate more fat.

Abdominal obesity: Fat stored around the abdominal organs, known as visceral fat, releases fatty acids and inflammatory substances that contribute to liver fat accumulation and injury.

Diabetes and fatty liver: People with Type 2 diabetes and obesity face a higher risk of advanced fatty liver disease. The relationship works both ways: metabolic problems can worsen liver health, while fatty liver is also associated with increased cardiovascular and diabetes risk.

Alcohol and Medications: Important Risk Factors

The liver processes alcohol and many medications, making it vulnerable to injury from excessive alcohol use and certain substances.

Alcohol: Breaking down alcohol produces substances that can damage liver cells, promote inflammation and interfere with normal fat metabolism. Continued heavy drinking increases the risk of fibrosis, cirrhosis and liver failure. Risks may be greater when alcohol use is combined with obesity or diabetes.

Medications: Certain prescription and over-the-counter medicines can cause liver injury. Acetaminophen (Tylenol), for example, can cause serious damage if taken in excessive amounts. Some prescription drugs, including methotrexate and amiodarone, may also affect liver function. Certain herbal and dietary supplements can cause liver injury as well.

Always follow recommended doses and consult your healthcare professional before starting supplements or changing medications.

When Should You Get Your Liver Checked?

Fatty liver disease is often called a silent condition because early stages may produce no symptoms. Medical assessment is particularly important for people with:

1. Type 2 diabetes or metabolic syndrome: These conditions increase the risk of significant liver disease.
2. Obesity or abdominal weight gain: Excess body fat, especially around the waist, is an important risk factor.
3. Abnormal blood tests: Elevated ALT and AST liver enzymes may indicate liver-cell injury. However, normal enzyme levels do not always rule out fatty liver or advanced scarring.
4. A history of heavy alcohol use: Regular assessment may help identify early liver injury.

Doctors may use the FIB-4 score, which considers age, liver enzymes and platelet count, to estimate the risk of liver scarring. Ultrasound and specialized imaging such as FibroScan (transient elastography) can help assess liver fat and stiffness. The appropriate tests depend on individual risk factors and medical history.

Practical Steps to Protect Your Liver

The liver has a remarkable capacity to recover, particularly when damage is identified early. Lifestyle changes can significantly improve metabolic health and reduce liver fat.

• Maintain a healthy weight: For people with excess weight, gradual weight loss can reduce liver fat. Losing approximately 5% of body weight may lower liver fat, while greater reductions of 7%–10% or more may improve inflammation and, in some cases, fibrosis.
• Eat a balanced diet: Choose vegetables, fruits, whole grains, legumes, nuts, fish and healthy fats. Limit sugary drinks, added sugars, refined carbohydrates and highly processed foods. A Mediterranean-style diet is a practical option.
• Exercise regularly: Aim for at least 150 minutes of moderate physical activity weekly, as tolerated. Exercise improves insulin sensitivity and can reduce liver fat, even without significant weight loss.
• Limit or avoid alcohol: Avoiding alcohol is particularly important for people with alcohol-related liver disease. Discuss alcohol consumption with your healthcare professional if you have fatty liver disease.
• Use medications responsibly: Follow prescribed doses, avoid excessive acetaminophen and consult a healthcare professional before taking herbal supplements.
• Control related conditions: Managing blood sugar, blood pressure and cholesterol helps protect liver and cardiovascular health.

Recognizing Warning Signs

Early fatty liver disease often causes no symptoms. Advanced liver injury, however, may produce persistent fatigue, abdominal discomfort, swelling in the legs or abdomen, jaundice (yellowing of the skin or eyes), dark urine or unexplained weight loss. These symptoms require medical evaluation. Confusion, vomiting blood or severe abdominal swelling requires urgent medical attention.

The key message is simple: do not wait for symptoms to take liver health seriously. If you have diabetes, obesity or a history of heavy alcohol use, discuss appropriate liver assessment with your healthcare professional.

Next Week: Part 7 – Sleep Is Medicine: Understanding Insomnia and Sleep Apnea

Next week, Healthy Aging, Healthy Living will explore why quality sleep is essential to healthy aging. We will discuss insomnia, sleep apnea, their warning signs and effects on heart and brain health, along with treatment options and practical habits that promote restful sleep.

Medical Disclaimer

This article is for general educational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. Screening, dietary changes, exercise and medication decisions should be tailored to individual needs. Consult a qualified healthcare professional about your risk factors, symptoms or test results. Do not start, stop or change medication without medical guidance. Seek prompt medical attention for concerning symptoms and emergency care for a medical emergency.