Natural Compounds in Non-Alcoholic Fatty Liver Disease Management

Non-alcoholic fatty liver disease (NAFLD) encompasses a spectrum of hepatic abnormalities ranging from simple steatosis to non-alcoholic steatohepatitis (NASH), fibrosis and cirrhosis. Its rising global prevalence is driven by obesity, metabolic syndrome and sedentary lifestyles. In the absence of approved pharmacological therapies, attention has turned to bioactive compounds derived from plants. Polyphenols, flavonoids, terpenoids and alkaloids have been shown to modulate key pathogenic pathways in NAFLD: they counter oxidative stress by scavenging reactive oxygen species, attenuate inflammation through down-regulation of pro-inflammatory cytokines, improve insulin sensitivity and restore lipid homeostasis. Complementary mechanisms include activation of cellular energy sensors such as AMP-activated protein kinase, enhancement of autophagy and modulation of gut microbiota. Preclinical and early clinical data suggest that combinations of natural compounds may act synergistically to reduce hepatic fat accumulation, prevent fibrotic remodelling and improve biochemical markers of liver injury.

Research from Nature Portfolio

In a foundational animal study, administration of resveratrol in models of diet- and lipopolysaccharide-induced steatohepatitis markedly suppressed inflammatory signalling and fibrotic deposition. The effect was linked to inhibition of lipopolysaccharide reactivity in liver macrophages via down-regulation of CD14 expression. Although steatosis per se was not fully prevented, the reduction in inflammatory cell infiltration and collagen accumulation pointed to a specific anti-fibrotic action. These findings underscore the potential of natural polyphenols to target later stages of NAFLD progression and inform the design of combination strategies aimed at limiting inflammation and fibrosis in NASH.

Natural Compounds in Non-Alcoholic Fatty Liver Disease Management publication trend

The graph below shows the total number of articles in natural compounds in non-alcoholic fatty liver disease management across all publications each year (not limited to Nature Index journals).

Technical terms

Non-alcoholic fatty liver disease (NAFLD): A condition characterised by excessive fat accumulation in hepatocytes not due to alcohol, ranging from simple steatosis to cirrhosis.

Non-alcoholic steatohepatitis (NASH): An advanced form of NAFLD marked by hepatocellular inflammation, ballooning and varying degrees of fibrosis.

Polyphenols: A diverse class of plant-derived compounds, including flavonoids and stilbenes, noted for antioxidant and anti-inflammatory properties.

Reactive oxygen species (ROS): Chemically reactive molecules containing oxygen that can cause cellular damage when produced in excess.

Autophagy: A regulated intracellular process for degradation and recycling of damaged organelles and proteins, crucial for cellular homeostasis under stress.

References

1. A scientifically validated combination of garcinol, curcuminoids, and piperine for mild to moderate nonalcoholic steatohepatitis patients—results from a randomized, double-blind, placebo-controlled study. Frontiers in Nutrition (2023).
2. Resveratrol ameliorates fibrosis and inflammation in a mouse model of nonalcoholic steatohepatitis. Scientific Reports (2016).
3. Dietary Polyphenols and Non-Alcoholic Fatty Liver Disease. Nutrients (2021).