Aronia berry extract can improve chicken gut bacteria in a dose-dependent manner without slowing growth, according to a 2026 study of 360 broiler chickens. Research shows that moderate doses increased beneficial bacteria like Bacillus and Lactobacillus, while the highest dose shifted bacteria composition unfavorably. Gram Research analysis indicates this natural extract could replace antibiotics in poultry farming, though real-world farm testing is needed before widespread adoption.
Researchers tested whether aronia berry extract could improve gut health in chickens raised without antibiotics. They fed 360 chickens either regular food or food mixed with different amounts of the berry extract for 35 days. According to Gram Research analysis, the extract successfully increased beneficial bacteria in the chickens’ digestive systems without slowing their growth. The findings suggest that natural plant extracts could replace antibiotics in poultry farming, offering a promising solution as farms move away from routine antibiotic use.
Key Statistics
A 2026 study of 360 broiler chickens found that aronia berry extract increased beneficial bacteria populations like Bacillus spp. and Lactobacillus jensenii in a dose-dependent manner without reducing growth performance.
The aronia extract demonstrated 94.5% antioxidant activity in laboratory testing, containing key beneficial compounds including chlorogenic acid, quercetin, and cyanidin-3-O-glucoside.
Medium-dose aronia supplementation (100 mg/kg) produced optimal results for gut bacteria balance, while the highest dose (200 mg/kg) led to dominance of Morganella morganii, suggesting an upper limit for beneficial effects.
Serum triglycerides, phosphorus, sodium, and iron concentrations showed statistically significant dose-dependent changes in chickens receiving aronia extract, indicating metabolic shifts without negative growth impacts.
The Quick Take
- What they studied: Whether aronia berry extract (a dark purple berry) could improve gut bacteria and overall health in chickens without using antibiotics
- Who participated: 360 male broiler chickens (the type raised for meat) divided into four groups over 35 days
- Key finding: Medium and high doses of the berry extract increased good bacteria like Bacillus and Lactobacillus in the chickens’ guts, with no negative effects on how fast the chickens grew
- What it means for you: This research supports using natural plant extracts as a replacement for antibiotics in chicken farming, though more studies in real farm conditions are needed before widespread use
The Research Details
Scientists divided 360 young chickens into four equal groups. One group ate normal chicken feed (the control group), while the other three groups ate feed mixed with different amounts of aronia berry extract—a small amount, a medium amount, or a large amount. The researchers tracked how fast the chickens grew, tested their blood for various nutrients and chemicals, and examined the bacteria living in their digestive systems. This controlled setup allowed researchers to see exactly what the berry extract did by comparing treated chickens to untreated ones.
Before using the extract in the chicken feed, scientists tested it in the lab to measure its antioxidant power (ability to fight harmful molecules) and identify which beneficial compounds it contained. They found that the ethanol-based extract was most powerful, containing helpful compounds like chlorogenic acid and quercetin. This careful preparation ensured they were testing a consistent, high-quality product.
The study lasted 35 days, which covers most of a broiler chicken’s growth period before processing. This timeframe is realistic for how chickens are actually raised on farms, making the results more applicable to real-world poultry production.
This research approach matters because it bridges the gap between laboratory science and farm practice. By testing the extract in living chickens under controlled conditions, researchers could see whether the theoretical benefits of aronia berries actually work in real animals. The study also examined multiple outcomes—growth, blood chemistry, and gut bacteria—rather than just one measure, giving a complete picture of the extract’s effects.
The study’s strengths include a reasonably large sample size (360 chickens), multiple dose levels to identify the best amount, and measurement of both growth performance and gut bacteria composition. The research was published in a peer-reviewed scientific journal, meaning other experts reviewed it before publication. However, the study was conducted in a controlled laboratory setting, not on actual farms, so results may differ in real-world conditions with different feed types, farm environments, and chicken breeds.
What the Results Show
The aronia berry extract did not slow down chicken growth at any dose tested—all chickens gained weight normally regardless of whether they received the extract. This is important because any supplement used in poultry farming must not reduce productivity.
The extract did change blood chemistry in dose-dependent ways, meaning higher doses produced bigger changes. Triglycerides (a type of fat in the blood) decreased, while phosphorus, sodium, and iron levels showed specific patterns related to the dose given. These changes suggest the extract was affecting how the chickens’ bodies processed nutrients and energy.
Most importantly, the extract successfully increased beneficial bacteria in the chickens’ guts. At medium and high doses, bacteria like Bacillus species and Lactobacillus jensenii became more common. These are ‘good’ bacteria that help with digestion and immune function. However, at the highest dose, a different bacterium called Morganella morganii became dominant, suggesting that too much extract might shift the balance in an undesirable direction.
The study identified specific beneficial compounds in the aronia extract—chlorogenic acid, quercetin, hesperidin, and cyanidin-3-O-glucoside—which are known antioxidants. The extract showed 94.5% antioxidant activity in laboratory tests, confirming its potency. These compounds likely explain why the extract influenced gut bacteria and blood chemistry. The dose-dependent responses (meaning different amounts produced different effects) suggest there’s an optimal amount to use, rather than ‘more is always better.’
This research fits into a growing body of work exploring natural alternatives to antibiotics in poultry farming. As countries ban routine antibiotic use in animal feed due to antibiotic resistance concerns, scientists are testing various plant extracts. Previous research suggested aronia berries have antimicrobial and antioxidant properties, but this is one of the first studies testing them specifically in chickens. The findings align with other research showing that plant polyphenols (beneficial compounds in plants) can modify gut bacteria composition.
The study was conducted in a controlled laboratory environment, not on actual farms, so results may not perfectly match real-world conditions where chickens face different stresses, feed variations, and environmental factors. The research only tested male chickens of one breed (Ross-308), so results might differ for other chicken types or females. The study lasted 35 days, covering the growth phase but not the full lifespan of chickens. Additionally, while the study measured gut bacteria composition, it didn’t measure whether these bacterial changes actually improved disease resistance or other health outcomes that matter on farms.
The Bottom Line
Based on this research, moderate doses of aronia berry extract (100 mg/kg of feed) appear most promising for improving chicken gut health without reducing growth. The highest dose tested (200 mg/kg) may be excessive based on the shift toward less desirable bacteria. However, these recommendations are preliminary and based on laboratory conditions—farms should await additional studies in real farm settings before making changes. Confidence level: Moderate, pending real-world validation.
Poultry farmers and producers seeking antibiotic alternatives should find this research relevant, as should feed manufacturers developing natural supplements. Consumers concerned about antibiotic use in food production may appreciate this research direction. However, individual consumers cannot directly apply these findings—they would need to be implemented by the poultry industry. Veterinarians and agricultural extension services should monitor this research area.
If a farm were to implement this approach, changes in gut bacteria composition would likely occur within days to weeks, but measurable improvements in disease resistance or other health benefits might take longer to observe. The 35-day study period represents a typical growth cycle, so benefits would need to be evaluated over multiple flocks to determine real-world impact.
Frequently Asked Questions
Can aronia berry extract replace antibiotics in chicken farming?
Research suggests aronia extract shows promise as an antibiotic alternative by improving gut bacteria, but this 2026 study was laboratory-based. Real farm testing is needed before widespread replacement. The moderate dose (100 mg/kg) appeared most beneficial for gut health balance.
Does aronia berry extract slow down chicken growth?
No. The 360-chicken study found that all doses of aronia extract had no significant effect on growth performance. Chickens receiving the supplement gained weight normally compared to control birds, making it safe for production use.
What is the best dose of aronia extract for chickens?
The 100 mg/kg dose (medium level) appeared optimal in this study, increasing beneficial bacteria without the unfavorable bacterial shifts seen at the highest dose (200 mg/kg). However, real-world farm conditions may require dose adjustments.
How does aronia berry extract change chicken gut bacteria?
The extract increased beneficial bacteria like Bacillus and Lactobacillus species in a dose-dependent manner. These bacteria support digestion and immune function. However, excessive doses promoted less desirable bacteria, suggesting an optimal range exists.
Is this research applicable to actual chicken farms?
This controlled laboratory study provides promising preliminary evidence, but was conducted under ideal conditions with one chicken breed. Real farm conditions involve different stresses, feed variations, and environments, so additional field studies are needed before confident farm implementation.
Want to Apply This Research?
- For poultry farmers using a farm management app: Track daily feed consumption, weekly weight gain per bird, and monthly health incidents (illness, mortality) in treatment versus control flocks to monitor whether the supplement delivers real-world benefits
- Farmers could implement a gradual trial by supplementing feed for one flock at the moderate dose (100 mg/kg) while maintaining a control flock on standard feed, then comparing growth rates and health outcomes over the full production cycle
- Establish a baseline of current gut health and disease rates, then monitor these metrics monthly across multiple flocks receiving the supplement to determine if benefits persist and whether the moderate dose remains optimal under real farm conditions
This research was conducted in controlled laboratory conditions with a single chicken breed and may not reflect real-world farm results. The study does not provide evidence that aronia extract prevents or treats any disease in chickens or humans. Poultry farmers should consult with veterinarians and follow local regulations before implementing any new feed supplements. This information is for educational purposes and should not replace professional agricultural or veterinary advice. Results from animal studies do not automatically apply to human nutrition or health.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.