Nutrition and nutritional supplements for chronic liver diseases

Nutrition and Dietary Supplements for Chronic Liver Diseases

The liver is our largest internal organ and the body’s largest gland, often referred to as the central laboratory of the body. It performs numerous reactions essential for metabolism, digestion, and overall health maintenance.

Types and Prevalence of Chronic Liver Diseases

Chronic liver diseases can be divided into inflammatory and non-inflammatory, as well as infectious and non-infectious. Worldwide, approximately 2 million people die annually due to liver disease, most often from liver cirrhosis.

While alcohol overconsumption has traditionally been associated with cirrhosis, in developed countries non-alcoholic fatty liver disease (NAFLD) has become a major cause. With the rise of obesity, diabetes, and metabolic syndrome, NAFLD has reached epidemic proportions and is now the leading cause of abnormal liver function tests.

Fatty liver is also increasingly associated with hepatocellular carcinoma (liver cancer) and is currently the second most common indication for liver transplantation.

Other significant challenges include chronic hepatitis B and C. New direct-acting antiviral therapies cure nearly 99% of chronic hepatitis C cases, while chronic hepatitis B can be effectively managed with medication but cannot be fully cured.

Alcoholic liver disease remains the leading cause of end-stage liver disease (cirrhosis and liver cancer). Hepatotoxicity from medications is also a risk factor, influenced by age, sex, nutritional status, pregnancy, alcohol use, comorbidities, and concurrent drug use.

Role of Nutrition

Regardless of the type of liver disease, lifestyle, nutrition, and dietary supplements play a significant role in disease prevention and clinical management.

Recommended dietary models:

• Mediterranean diet

• Plant-based diet

Foods Beneficial for Liver Health

1. Detoxifying foods – promote liver detoxification

2. Antioxidant-rich foods – protect liver cells during detoxification

Examples of hepatoprotective foods:

• Artichokes

• Legumes

• Bitter greens

• Cruciferous vegetables (kale, broccoli, Brussels sprouts)

Traditional liver “cleansing” approaches include drinking vegetable juices (carrot, beetroot, radicchio, dandelion).

Risk factors for liver disease:

• Excessive alcohol

• Obesity

• Frequent consumption of fatty, sweet, processed, or fried foods

• Smoking, environmental toxins

• Overeating, which forces the liver to “work overtime”

Gut Microbiota and Liver Health

The gut microbiota plays a critical role in liver disease development.

• Dysbiosis (imbalanced gut flora) contributes to:

  • NAFLD

  • Steatohepatitis

  • Alcoholic liver disease

  • Cirrhosis

Mechanisms:

• Gut inflammation

• Impaired gut barrier

• Translocation of microbial products

Supportive dietary strategies:

• Foods rich in fiber

• Fermented foods and beverages

• Probiotics

Beverages: Coffee

Coffee consumption has long been recognized for protecting the liver and gallbladder. A 2021 BMJ review found:

• Any coffee type (ground, instant, decaf) reduced the risk of chronic liver disease.

• Optimal benefit: 3–4 cups/day

Benefits observed in coffee drinkers:

• 21% lower risk of chronic liver disease

• 20% lower risk of fatty liver disease

• 49% lower risk of liver-related death

The protective effect is attributed to kahweol and cafestol, potent antioxidants present in coffee.

Role of Dietary Supplements

Antioxidants are crucial for protecting liver cells from oxidative stress. Commonly recommended supplements for liver support include:

• Vitamin E

• Selenium

• Zinc

• Vitamin D

• Selected plant extracts with hepatoprotective properties

Milk Thistle (Silybum marianum)

• Most well-known herb for liver support

• Main active component: silymarin (a flavonoid complex)

• Effects:

  • Reduces oxidative stress

  • Protects liver cells (hepatocytes)

  • Modulates enzymes involved in fibrosis and cirrhosis

• Clinical evidence:

  • Benefits in alcoholic and non-alcoholic fatty liver disease

  • Can improve blood sugar regulation in diabetic patients with liver disease

• Well-tolerated with minimal side effects

• Early intervention maximizes liver regenerative potential

Artichoke (Cynara scolymus)

• Whole artichoke can be included in the diet

• Artichoke leaf extract is rich in cynarin, silymarin, and inulin (prebiotic)

• Effects:

  • Hepatoprotective

  • Regenerative and antioxidant

  • Improves liver fat accumulation and liver function in NAFLD

  • Supports cardiovascular health via improved blood lipid profile

Conclusion:
Nutrition and dietary supplements can play a supportive role in managing chronic liver diseases. A plant-based or Mediterranean diet, coffee consumption, probiotics, and supplements such as milk thistle and artichoke extract can help reduce liver damage and support overall liver function.

References:

• Ben Salem M, Affes H, Ksouda K, et al. Pharmacological Studies of Artichoke Leaf Extract and Their Health Benefits. Plant Foods Hum Nutr. 2015;70(4):441-53.

• Gillessen A, Schmidt HH. Silymarin as Supportive Treatment in Liver Diseases: A Narrative Review. Adv Ther. 2020;37(4):1279-1301.

• Kennedy OJ, Fallowfield JA, Poole R, et al. All coffee types decrease the risk of adverse clinical outcomes in chronic liver disease: a UK Biobank study. BMC Public Health 2021;21:970.

• Soleimani V, Delghandi PS, Moallem SA, Karimi G. Safety and toxicity of silymarin, the major constituent of milk thistle extract: An updated review. Phytother Res. 2019;33(6):1627-1638.