Researchers tested a traditional Chinese medicine called Shugan Jiangzhuo Tablets (SGJZ) to see if it could help treat fatty liver disease, a condition where fat builds up in the liver. Using fish models, scientists discovered that the medicine worked by changing the bacteria in the gut and reducing inflammation in the liver. The treatment improved weight, fat levels, and liver health markers. Importantly, when researchers removed the gut bacteria, the medicine didn’t work as well, proving that healthy gut bacteria are key to how this treatment helps. This research suggests the medicine could become a useful treatment option, though human studies are still needed.
The Quick Take
- What they studied: Whether a traditional Chinese herbal medicine could reduce fatty liver disease by changing gut bacteria and reducing liver inflammation
- Who participated: Zebrafish (fish models) were used instead of humans. Some fish were given a high-fat diet to develop fatty liver disease, while others were treated with antibiotics to remove their gut bacteria
- Key finding: The herbal medicine significantly improved fatty liver disease in fish by promoting healthy gut bacteria and reducing inflammation in the liver. However, when gut bacteria were removed with antibiotics, the medicine’s benefits were reduced or eliminated
- What it means for you: This research suggests a new way to treat fatty liver disease by supporting gut health, but these are early-stage findings in fish models. Human studies would be needed before this treatment could be used in people
The Research Details
Scientists created zebrafish (small fish commonly used in research) with fatty liver disease by feeding them a high-fat diet for three weeks. They then treated some fish with Shugan Jiangzhuo Tablets, a traditional Chinese medicine that has been used in hospitals for over 20 years. To understand how the medicine worked, researchers also created fish without gut bacteria using antibiotics, then treated them with the same medicine to see if the bacteria were necessary for the treatment to work.
The researchers measured many things in the fish, including body weight, fat levels, liver health markers in the blood, and the types of bacteria living in their guts. They used advanced genetic testing (16S rRNA sequencing) to identify which bacteria were present and how the medicine changed the bacterial community.
This approach allowed scientists to separate the medicine’s direct effects on the liver from its effects through changing gut bacteria, which is an important distinction for understanding how the treatment actually works.
Understanding exactly how a medicine works is crucial before testing it in humans. By using fish models and removing variables (like gut bacteria), researchers can identify the specific mechanisms responsible for health improvements. This knowledge helps predict whether the treatment might work in people and guides future human studies.
This study used a controlled experimental design with multiple groups for comparison, which strengthens the findings. The use of genetic sequencing to identify bacteria is a reliable modern method. However, this research was conducted only in fish, not humans, so results may not directly apply to people. The study doesn’t specify exact sample sizes, which makes it harder to assess statistical power. Additional human studies would be needed to confirm these findings are relevant to treating fatty liver disease in people.
What the Results Show
The herbal medicine significantly improved multiple markers of fatty liver disease in the fish. Body weight and fat accumulation decreased, and the liver showed less damage under the microscope. Blood tests improved, showing better lipid profiles and lower liver enzyme levels, which are signs of reduced liver damage.
Crucially, the medicine changed the composition of gut bacteria in beneficial ways. It increased the abundance of helpful bacteria while reducing harmful ones. One specific bacterium called Cetobacterium appeared to be particularly important for the treatment’s success.
The medicine also protected the intestinal barrier (the lining of the gut that controls what enters the bloodstream) and reduced the amount of harmful bacterial toxins (lipopolysaccharides) that leaked into the liver. This is important because these toxins trigger inflammation.
When researchers removed the gut bacteria using antibiotics, the medicine’s benefits were significantly reduced. This proved that the gut bacteria were essential for the treatment to work, not just a side effect.
The medicine reduced inflammation in the liver by blocking a specific inflammatory pathway (TLR4/MyD88/NF-κB). This pathway is like a communication system that tells cells to create inflammation. By blocking this pathway, the medicine reduced the inflammatory response. The protection of the intestinal barrier was also significant, as a damaged gut barrier allows harmful substances to enter the bloodstream and cause problems throughout the body.
This research builds on growing evidence that gut bacteria play an important role in fatty liver disease. Previous studies have shown that people with fatty liver disease often have different gut bacteria than healthy people. This study provides a specific mechanism showing how changing gut bacteria can improve the disease. The focus on the gut-liver connection aligns with recent scientific understanding that these two organs communicate closely through the bloodstream and immune system.
The most significant limitation is that this study used fish, not humans. Fish have simpler bodies and different metabolisms than people, so results may not directly translate. The study doesn’t provide exact sample sizes for the fish groups, making it difficult to assess how reliable the findings are. The research was conducted in a laboratory setting with controlled conditions, which is very different from real life where people have varied diets, stress levels, and lifestyles. Additionally, this is a single study of one herbal medicine, so the findings need to be confirmed by other independent researchers before drawing firm conclusions.
The Bottom Line
Based on this research, Shugan Jiangzhuo Tablets shows promise as a potential treatment for fatty liver disease, but it’s too early to recommend it as a standard treatment. The evidence is moderate-quality because it comes from fish studies only. People interested in this medicine should consult with their healthcare provider, particularly a doctor familiar with both conventional and traditional Chinese medicine. Supporting overall gut health through diet and lifestyle remains important regardless of any specific treatment.
People with non-alcoholic fatty liver disease or those at risk for it (due to obesity, diabetes, or metabolic syndrome) should be aware of this research. Healthcare providers treating fatty liver disease may find this information useful for understanding potential mechanisms of treatment. However, this research is not yet ready to guide treatment decisions in humans. People should not self-treat with this medicine without medical supervision.
In the fish studies, improvements were seen after the treatment period (the study lasted 21 days for the initial disease development plus treatment time). If this medicine were tested in humans, benefits would likely take weeks to months to become apparent, similar to other fatty liver disease treatments. Long-term effects would need to be studied over months to years.
Want to Apply This Research?
- If a user is interested in supporting gut health for liver disease management, they could track: (1) daily fiber intake from vegetables, fruits, and whole grains, (2) probiotic food consumption (yogurt, kefir, sauerkraut), and (3) weekly liver health markers if monitored by their doctor (ALT and AST enzyme levels)
- Users could implement a gut-health supporting routine: eat at least 3 servings of fiber-rich foods daily, include one fermented food daily, drink adequate water (8+ glasses), and maintain a food diary to identify triggers for digestive issues. The app could send reminders for these habits and track consistency over time
- Long-term tracking should include: monthly weight measurements, quarterly blood work results (if available from doctor), daily digestive health notes (energy, digestion quality), and weekly adherence to gut-supporting habits. Users should also track any changes in symptoms like fatigue or abdominal discomfort. This data helps identify patterns and assess whether lifestyle changes are helping
This research was conducted in fish models and has not been tested in humans. Shugan Jiangzhuo Tablets should not be used to treat fatty liver disease without consulting a qualified healthcare provider. This article is for educational purposes only and does not constitute medical advice. People with fatty liver disease should work with their doctor to develop an appropriate treatment plan, which may include lifestyle changes, dietary modifications, and conventional medical treatments. Do not start any new supplement or herbal medicine without discussing it with your healthcare provider, as these products may interact with medications or have side effects. If you have fatty liver disease or suspect you might, seek professional medical evaluation and guidance.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.