Researchers tested whether a purple pigment found in mulberries could help mice with unhealthy diets and heart disease risk. The mice that received mulberry extract or one of its main compounds showed improvements in cholesterol levels, inflammation markers, and the balance of bacteria in their gut. The treatment also boosted the body’s natural antioxidant defenses. These results suggest that mulberries might one day help people protect their heart and digestive health, though more human studies are needed to confirm these findings.
The Quick Take
- What they studied: Whether a purple compound from mulberries could reduce heart disease risk and improve gut health in mice eating an unhealthy diet high in fat and cholesterol
- Who participated: Laboratory mice that were genetically modified to be prone to heart disease, divided into four groups receiving different treatments over several weeks
- Key finding: Mice treated with mulberry extract or its main compound (called C3G) showed lower cholesterol levels, less inflammation, better antioxidant protection, and healthier gut bacteria compared to untreated mice
- What it means for you: Mulberries may help protect heart and digestive health, but this is early research in animals. More studies in humans are needed before we can recommend mulberry supplements as a treatment. Eating whole mulberries as part of a healthy diet is likely safe and may offer benefits.
The Research Details
Scientists used laboratory mice that were genetically engineered to develop heart disease easily, similar to how some humans are at higher risk. They fed all the mice an unhealthy diet high in fat and cholesterol for 7 weeks to create heart disease conditions. Then they divided the mice into four groups: one group got no treatment, one got mulberry fruit extract, and two groups got different doses of C3G, which is the main purple pigment in mulberries. After 2-3 weeks of treatment, the researchers collected blood and tissue samples to measure various health markers.
The researchers measured several important things: cholesterol levels (especially the “bad” LDL cholesterol), inflammation markers that indicate heart disease risk, antioxidant levels that protect cells from damage, and the types of bacteria living in the mice’s guts. They also analyzed liver chemicals to understand how the mulberry compounds were working in the body.
This research approach is important because it uses a disease model that closely mimics human heart disease risk. By measuring multiple health markers—cholesterol, inflammation, antioxidants, and gut bacteria—the researchers could see how mulberry compounds work through different pathways in the body. Understanding the gut bacteria changes is particularly valuable because scientists are learning that gut health is connected to heart health.
This study was published in a peer-reviewed scientific journal, which means other experts reviewed the work before publication. The researchers used a controlled design with comparison groups, which strengthens the findings. However, this is animal research, so results may not directly apply to humans. The sample size appears modest, and the study duration was relatively short (2-3 weeks of treatment). The specific mechanisms were measured in detail, which adds credibility to the findings.
What the Results Show
The most impressive result was in the group receiving the highest dose of C3G (the main mulberry compound). This group had significantly lower LDL cholesterol—the type that builds up in arteries and causes heart disease. Their cholesterol dropped to 7.3 mmol/L compared to the untreated group.
All three mulberry treatment groups showed dramatically higher levels of an important antioxidant called glutathione peroxidase (GSH-PX). This enzyme protects cells from damage caused by harmful molecules. The mulberry extract group had levels of 636.3, the lower-dose C3G group had 611.5, and the higher-dose C3G group had 757.5, all significantly higher than the untreated group.
The treatment also reduced inflammation. The higher-dose C3G group showed lower levels of interleukin-1β, a chemical messenger that signals inflammation in the body. This is important because chronic inflammation is a major risk factor for heart disease.
Perhaps most interestingly, the mulberry treatments changed the composition of bacteria in the mice’s guts. The treatments increased beneficial bacteria like Anaerotruncus, Tyzzerella, and Butyricicoccus while decreasing potentially harmful bacteria like Sphingomonas, Odoribacter, and Rikenella. A healthier bacterial balance may improve digestion and reduce disease risk.
The researchers also found changes in liver metabolites—chemical compounds produced during metabolism. The mulberry treatments decreased ATP (a molecule that stores energy) and indole-3-butyric acid (a compound from gut bacteria), while increasing glutamine (an amino acid important for many body functions) and a compound called Pg36:3. These changes suggest the mulberry compounds are affecting how the body processes energy and nutrients at a fundamental level.
Previous research has shown that anthocyanins—the purple pigments in berries—have antioxidant and anti-inflammatory properties. This study builds on that knowledge by showing these compounds can also reshape gut bacteria in beneficial ways. The finding that gut bacteria changes are connected to improved cholesterol and inflammation markers aligns with recent discoveries about the gut-heart connection. However, most previous studies focused on individual compounds, while this research tested both whole mulberry extract and isolated compounds, providing a more complete picture.
This study was conducted in genetically modified mice, not humans, so the results may not directly translate to people. The treatment period was relatively short (2-3 weeks), so we don’t know if benefits would continue or increase with longer use. The study didn’t measure actual heart disease development or other long-term health outcomes. The sample size wasn’t specified but appears to be relatively small. Additionally, the mice were fed an extremely unhealthy diet, so results might differ in people eating more balanced diets. Finally, this study doesn’t tell us what dose of mulberries would be needed in humans or whether whole berries would work as well as the extracted compounds.
The Bottom Line
Based on this research, we cannot yet recommend mulberry supplements as a medical treatment. However, eating whole mulberries as part of a healthy diet is safe and may offer benefits based on this and other research. If you’re interested in trying mulberries, aim for a small handful (about 1 cup) several times per week. This research is most relevant for people with high cholesterol, heart disease risk, or digestive issues, but human studies are needed before making specific recommendations. Confidence level: Low to Moderate (this is animal research only).
This research is most relevant to people concerned about heart disease, high cholesterol, or gut health. It may be particularly interesting to those looking for natural approaches to support heart health. However, people taking blood thinners or cholesterol medications should consult their doctor before significantly increasing mulberry consumption. This research is not yet applicable to children or pregnant women, as no human safety studies have been done.
In the mice, beneficial changes appeared within 2-3 weeks of treatment. In humans, if mulberries have similar effects, changes in cholesterol and inflammation markers might take 4-12 weeks to become noticeable. Gut bacteria changes could happen faster (within 2-4 weeks) since bacteria respond quickly to dietary changes. However, these timelines are estimates based on animal research and may differ significantly in people.
Want to Apply This Research?
- Track daily mulberry consumption (cups or grams) and measure cholesterol or inflammation markers monthly if available through your doctor. Also track digestive symptoms like bloating, regularity, and energy levels weekly.
- Add a small handful of fresh or frozen mulberries to your breakfast routine—try them in oatmeal, yogurt, or smoothies. Start with 2-3 servings per week and gradually increase to daily if desired. This is an easy way to test whether mulberries make you feel better without requiring supplements.
- Keep a food diary noting mulberry intake and any changes in digestion, energy, or how you feel. If you have access to cholesterol testing through your doctor, track LDL cholesterol and inflammation markers every 3 months. Note any changes in digestive health, bloating, or bowel regularity as these relate to the gut bacteria changes shown in this research.
This research was conducted in laboratory mice with genetic modifications, not in humans. The findings are preliminary and should not be used to diagnose, treat, or prevent any disease. Mulberry supplements are not approved by the FDA as medical treatments. If you have high cholesterol, heart disease, or are taking medications (especially blood thinners or cholesterol drugs), consult your healthcare provider before significantly increasing mulberry consumption or taking mulberry supplements. This article is for educational purposes only and does not replace professional medical advice. Always speak with a doctor before making major dietary changes or starting supplements, especially if you have existing health conditions.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.