Researchers discovered that a natural compound called costunolide, found in plants, may help treat fatty liver disease and improve how the body handles blood sugar. In studies using mice fed an unhealthy diet and liver cells in a lab, costunolide reduced fat buildup in the liver by activating a cellular pathway that controls fat production. The compound worked by turning on a protein called AMPK, which then stopped other proteins from making too much fat. While these early results are encouraging, more research in humans is needed before this could become a treatment option.
The Quick Take
- What they studied: Whether a natural plant compound called costunolide could reduce fat buildup in the liver and improve insulin resistance in mice with fatty liver disease
- Who participated: Laboratory mice fed a high-fat, high-sugar diet designed to cause fatty liver disease, plus liver cells grown in dishes and treated with fatty acids
- Key finding: Costunolide reduced fat accumulation in mouse livers and in liver cells by activating a cellular switch (AMPK) that tells the body to make less fat
- What it means for you: This natural compound may eventually help treat fatty liver disease, but it’s still in early testing stages. Don’t expect it as a treatment yet—more human studies are needed first
The Research Details
Scientists used two main approaches to test costunolide. First, they fed mice an unhealthy diet high in fat, sugar, and cholesterol to create fatty liver disease, then gave some mice costunolide to see if it helped. Second, they grew liver cells in dishes, exposed them to fatty acids to mimic the disease, and treated them with costunolide. They used advanced genetic testing (RNA sequencing) to understand exactly how the compound worked at the cellular level, and they blocked a key protein to prove costunolide was working through a specific pathway.
The researchers measured fat levels in the liver, triglyceride content in cells, and tracked changes in genes and proteins involved in fat production. They also tested what happened when they blocked the main pathway costunolide uses, which confirmed that pathway was essential for the compound’s benefits.
This combination of animal studies and cell studies helps researchers understand both whether something works and how it works, making it a solid foundation for future human research.
Using both living animals and cells in dishes allows researchers to see if results in one system hold up in another. Testing the specific pathway (AMPK/ACC1) is important because it shows the compound isn’t just randomly helping—it’s working through a known biological mechanism. This makes it more likely the results could eventually apply to humans.
The study used modern genetic analysis (RNA-seq) to identify how costunolide works, which is more thorough than older methods. The researchers tested their main finding by blocking the pathway with a specific inhibitor, which strengthens their conclusions. However, this research was only done in mice and lab cells, not humans, so results may not directly transfer to people. The study size and specific mouse numbers weren’t detailed in the abstract, which limits our ability to assess statistical reliability.
What the Results Show
Costunolide successfully reduced the amount of fat stored in the livers of mice that were fed an unhealthy diet. In liver cells treated with fatty acids in the lab, the compound lowered triglyceride levels (a type of fat in the blood). The compound worked by activating a protein called AMPK, which then activated another protein called ACC1. This activation turned off genes responsible for making new fat in the liver.
When researchers blocked AMPK with a specific inhibitor drug, costunolide lost its ability to reduce fat—proving that this pathway was essential for the compound’s effects. This is important because it shows the compound isn’t working by accident; it’s specifically targeting a known biological mechanism.
The results suggest costunolide improves liver function and reduces the excessive fat accumulation that defines fatty liver disease. The compound appeared to work both in living organisms (mice) and in isolated cells, suggesting the effect is real and reproducible.
Beyond fat reduction, the research suggests costunolide may help improve insulin resistance, which is when the body has trouble responding to insulin and controlling blood sugar. This is significant because fatty liver disease and insulin resistance often occur together and make each other worse. By improving both conditions, costunolide might address multiple problems at once.
Costunolide is a natural compound that scientists already knew had some protective effects on the liver. This study builds on that knowledge by showing specifically how it works and proving it can help with fatty liver disease. The AMPK/ACC1 pathway the researchers identified is a well-known target in metabolic disease research, so this finding fits with existing scientific understanding and validates costunolide as a promising candidate for further study.
This research was only conducted in mice and laboratory cells, not in humans, so we can’t be certain the results will apply to people. The study didn’t compare costunolide to existing treatments, so we don’t know if it’s better or worse than current options. The exact dose and duration of treatment that would be needed in humans is unknown. Additionally, the abstract doesn’t provide specific numbers for how many mice were used or detailed statistical information, making it harder to assess the strength of the findings. Long-term safety and side effects in humans haven’t been tested.
The Bottom Line
Based on this early research, costunolide shows promise as a potential treatment for fatty liver disease, but it’s not ready for human use yet. Current confidence level: Low to Moderate (this is preliminary research). Until human studies are completed, the best approach remains proven strategies: maintaining a healthy weight, eating a balanced diet low in processed foods and added sugars, exercising regularly, and limiting alcohol. If you have fatty liver disease, work with your doctor on these established approaches.
People with fatty liver disease or metabolic syndrome should follow this research, as it could eventually offer new treatment options. Those interested in natural remedies for liver health may find this encouraging, but should not self-treat with costunolide supplements yet. Healthcare providers treating metabolic disease should monitor this research as it progresses. People without fatty liver disease don’t need to take action based on this single study.
If costunolide moves forward in research, human clinical trials would likely take 3-7 years before any potential treatment becomes available. Even then, it would need to be tested for safety and effectiveness in people, which could take several more years. Don’t expect this as a treatment option in the near term.
Want to Apply This Research?
- Track weekly liver health markers if you have fatty liver disease: weight, waist circumference, energy levels, and any digestive symptoms. Note dietary choices (especially processed foods and added sugars) and exercise minutes. If costunolide becomes available for testing, these baseline measurements would help assess any changes.
- Use the app to set and monitor evidence-based lifestyle goals that help fatty liver disease: reduce added sugar intake to under 25g daily (women) or 36g daily (men), increase physical activity to 150 minutes weekly, and maintain a healthy weight. Log meals to identify high-fat and high-sugar patterns that contribute to liver fat accumulation.
- Establish a monthly check-in to review liver health trends. Track weight, energy levels, and digestive health. If you have access to liver function blood tests (ALT, AST levels), record results when available. Set reminders for annual doctor visits to monitor liver health with professional testing. As research on costunolide progresses, use the app to stay informed about clinical trial opportunities.
This research is preliminary and was conducted only in mice and laboratory cells. Costunolide is not currently approved as a medical treatment for fatty liver disease in humans. Do not attempt to self-treat with costunolide supplements or other products based on this study. If you have fatty liver disease or metabolic concerns, consult with your healthcare provider about proven treatment options and lifestyle modifications. This summary is for educational purposes only and should not replace professional medical advice. Always speak with your doctor before starting any new supplement or treatment, especially if you have existing liver disease or take medications.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.