Research shows that beta-glucan and pectin, two types of plant fiber, improved egg production and reduced liver fat in aging laying hens by changing their gut bacteria. According to Gram Research analysis of this 8-week study with 288 hens, beta-glucan and pectin increased egg production during the first four weeks and reduced liver triglycerides (a type of fat) that persisted through week 8. These fibers worked by promoting beneficial bacteria that produce compounds helping the body manage fat better.
Researchers tested three types of special plant fibers (beta-glucan, arabinoxylan, and pectin) added to the diet of aging laying hens to see how they affected egg production and health. According to Gram Research analysis, beta-glucan and pectin improved egg production and reduced fat buildup in the liver, while also changing the bacteria in the chickens’ digestive systems in beneficial ways. The study found that these fibers work by triggering special signals in the gut that help the body manage fat better. This research suggests that adding specific plant fibers to animal feed could be a natural way to keep older animals healthier and more productive.
Key Statistics
A controlled study of 288 laying hens published in 2026 found that beta-glucan and pectin supplementation significantly increased egg production and mass during weeks 1-4 compared to unsupplemented feed.
Research with 288 aged laying hens showed that both beta-glucan and pectin reduced hepatic triglyceride content by week 4, with effects persisting through week 8 in both treatment groups.
A 2026 study of 288 laying hens identified that Ligilactobacillus bacteria, promoted by fiber supplementation, showed positive associations with short-chain fatty acids and negative associations with liver fat content.
Beta-glucan supplementation in 288 laying hens maintained elevated fibroblast growth factor 19 (FGF19) expression at week 8, a signaling molecule linked to improved fat metabolism.
The Quick Take
- What they studied: Whether three different types of plant fiber (beta-glucan, arabinoxylan, and pectin) could improve egg production and liver health in older laying hens
- Who participated: 288 laying hens that were 63 weeks old (equivalent to elderly chickens). The hens were divided into four groups: a control group eating regular feed, and three groups eating regular feed plus one of the three types of fiber
- Key finding: Beta-glucan and pectin increased egg production and reduced fat buildup in the liver by changing the bacteria in the chickens’ digestive systems. These benefits lasted throughout the 8-week study period
- What it means for you: While this study focused on chickens, it suggests that certain plant fibers may help aging bodies manage fat better by improving gut health. However, more research in humans would be needed before drawing conclusions about human health
The Research Details
Researchers divided 288 older laying hens into four equal groups. One group ate normal feed (the control), while the other three groups ate the same feed but with one of three added plant fibers: beta-glucan, arabinoxylan, or pectin. Each fiber was added at the same amount (2 grams per kilogram of feed). The hens ate this way for 8 weeks while researchers measured egg production, egg quality, liver health, and the types of bacteria living in their digestive systems.
The researchers collected samples at different time points to track changes over time. They measured how many eggs the hens laid, how strong the eggshells were, and how much fat accumulated in the liver. They also analyzed the bacteria in the hens’ digestive systems and looked at special signaling molecules that help control digestion and metabolism.
This type of study is called a controlled experiment because researchers carefully controlled what each group ate and measured specific outcomes. By comparing the three fiber groups to the control group, they could determine which fibers had the strongest effects.
This research approach is important because it tests one variable at a time (each type of fiber separately) while keeping everything else the same. This helps researchers understand exactly which fiber does what, rather than guessing. By measuring multiple outcomes (egg production, liver health, gut bacteria, and signaling molecules), the study shows how fibers work through multiple pathways in the body
The study included a large number of animals (288 hens) divided into multiple groups, which makes the results more reliable. The researchers measured outcomes at different time points (weeks 4 and 8), showing whether effects lasted over time. They used scientific methods to identify bacteria and measure liver fat. However, this study was conducted in chickens, not humans, so results may not directly apply to people. The study was published in a peer-reviewed journal, meaning other scientists reviewed it before publication
What the Results Show
Beta-glucan and pectin significantly improved egg production during the first four weeks of the study. Hens eating these fibers laid more eggs and produced more total egg mass (the combined weight of all eggs) compared to hens eating regular feed. These improvements in egg production were statistically significant, meaning they were unlikely to have happened by chance.
Both beta-glucan and pectin reduced fat buildup in the liver. At week 4, hens eating either of these fibers had lower levels of triglycerides (a type of fat) in their livers compared to the control group. Importantly, this benefit continued through week 8 for both fibers, suggesting a lasting effect.
The fibers worked by changing the bacteria in the hens’ digestive systems. Hens eating beta-glucan and pectin had different populations of beneficial bacteria compared to control hens. These bacteria changes were linked to improved fat metabolism and lower liver fat. The fibers also activated special signaling molecules in the gut that help regulate digestion and fat processing.
Beta-glucan showed the strongest overall effects. In addition to improving egg production and reducing liver fat, beta-glucan also improved eggshell strength by week 8. Arabinoxylan had the weakest effects, showing no significant impact on egg production and actually reducing some measures of egg quality
Arabinoxylan supplementation reduced albumen height and Haugh unit (measures of egg white quality) at week 8, suggesting this fiber may not be beneficial for laying hens. The study identified specific bacteria, particularly Faecousia and Ligilactobacillus, that were associated with better fat metabolism and lower liver fat. These bacteria appear to work by producing short-chain fatty acids, which are beneficial compounds that help regulate metabolism. The researchers found that changes in gut bacteria were directly linked to improvements in liver health, suggesting the gut-liver connection is important for how these fibers work
This study builds on previous research showing that plant fibers can improve gut health and metabolism. The finding that different fiber types have different effects is important because earlier research sometimes treated all fibers as similar. This work shows that the specific structure of the fiber matters for determining which benefits occur. The results align with growing evidence that gut bacteria play a key role in managing body fat and liver health, a finding that has been observed in both animal and human studies
This study was conducted only in chickens, so results may not directly apply to humans or other animals. The study lasted only 8 weeks, so we don’t know if the benefits would continue longer or if the body would adapt over time. The study tested only one dose of each fiber (2 grams per kilogram), so we don’t know if higher or lower doses might work better. The researchers didn’t test combinations of fibers together, only individual fibers. Finally, while the study measured many biological markers, it didn’t directly measure whether these changes would improve the hens’ overall health or lifespan
The Bottom Line
Based on this research, beta-glucan and pectin appear to be the most promising plant fibers for supporting liver health and metabolism in aging animals by improving gut bacteria. The evidence is moderately strong for these specific fibers in laying hens, but human studies would be needed before recommending these fibers for people. Arabinoxylan did not show benefits and may have some negative effects, so it appears less useful for this purpose. If considering fiber supplements, choose those containing beta-glucan or pectin rather than arabinoxylan
This research is most relevant to poultry farmers and producers looking to improve egg production and animal health in older flocks. Nutritionists and veterinarians working with aging animals may find this information useful. While the study was in chickens, people interested in gut health, liver health, and how fiber affects metabolism may find the mechanisms interesting. However, this research should not be used to make health decisions for humans without additional human studies
In the chickens studied, improvements in egg production appeared within the first four weeks of eating the supplemented feed. Reductions in liver fat also appeared by week 4 and persisted through week 8. If similar effects occurred in humans, benefits might take several weeks to appear, but this is speculative without human research
Frequently Asked Questions
What plant fibers are best for improving gut health and reducing liver fat?
Beta-glucan and pectin showed the strongest benefits in this study of 288 laying hens, improving egg production and reducing liver fat over 8 weeks. These fibers work by promoting beneficial gut bacteria that help regulate fat metabolism. Arabinoxylan showed minimal benefits and some negative effects on egg quality
How long does it take for fiber supplements to improve metabolism and liver health?
In this 8-week study with 288 hens, improvements in egg production appeared within the first four weeks, and reductions in liver fat also emerged by week 4 and persisted through week 8. Human studies would be needed to determine if similar timelines apply to people
How do plant fibers like beta-glucan actually help reduce liver fat?
These fibers change the bacteria living in your digestive system, promoting beneficial species like Ligilactobacillus. These bacteria produce short-chain fatty acids and activate signaling molecules (like GLP-1 and FGF19) that help your body manage fat better and reduce fat accumulation in the liver
Can I get these beneficial fibers from food instead of supplements?
Beta-glucan is found naturally in oats, barley, and mushrooms. Pectin is abundant in apples, citrus fruits, and berries. Eating these whole foods provides fiber plus other nutrients, though the exact amounts may differ from the study’s supplementation levels
Is this research applicable to humans or just chickens?
This study was conducted in laying hens, so results may not directly apply to humans. However, the mechanisms identified (gut bacteria changes, fat metabolism signaling) are similar across species. Human studies would be needed to confirm whether these fibers provide the same benefits in people
Want to Apply This Research?
- Track daily fiber intake by type (beta-glucan, arabinoxylan, pectin) in grams, along with weekly measurements of energy levels and digestive comfort. Record any changes in these markers over 4 to 8 weeks
- Add beta-glucan or pectin-rich foods to your diet (such as oats, barley, apples, or citrus fruits) and track how you feel. Start with one source and increase gradually over 2 to 3 weeks to allow your gut bacteria to adjust
- Maintain a weekly log of fiber intake, digestive symptoms, energy levels, and any changes in how you feel. After 8 weeks, review whether you notice patterns between fiber intake and your wellbeing. Consider repeating this tracking quarterly to monitor long-term effects
This research was conducted in laying hens and may not directly apply to human health. While the findings about fiber and gut bacteria are interesting, people should not make health decisions based solely on this animal study. Anyone considering fiber supplements or making dietary changes should consult with a healthcare provider, especially those with existing liver conditions, digestive disorders, or taking medications. This article is for informational purposes only and does not constitute medical advice
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.