Adding Mosla chinensis essential oil to chicken feed at 160 mg per kilogram improved feed efficiency by 5%, increased growth rate by 11% in the first three weeks, and made breast meat more tender and longer-lasting, according to a 2026 study of 1,008 chickens published in the Journal of Animal Science. The oil also reduced cellular damage markers in the birds’ blood and promoted beneficial gut bacteria, suggesting it could serve as a natural alternative to synthetic feed additives.
Researchers tested whether adding Mosla chinensis essential oil—a plant extract used in traditional Chinese medicine—to chicken feed could improve meat quality and bird health. In a 52-day study with over 1,000 chickens, birds that received moderate amounts of this oil (80-160 mg per kilogram of feed) grew faster in their first three weeks, needed less feed to gain weight, had healthier blood chemistry, and produced more tender meat that stayed fresher longer. The oil also improved the beneficial bacteria in the chickens’ digestive systems. According to Gram Research analysis, this plant-based additive could offer a natural alternative to conventional feed supplements.
Key Statistics
A 2026 study of 1,008 yellow-feathered chickens found that those fed Mosla chinensis essential oil at 160 mg/kg required 2.25 units of feed per unit of weight gain compared to 2.36 in control birds, representing a 5% improvement in feed efficiency over 52 days.
In the first three weeks of life, chickens receiving 80-160 mg/kg of Mosla chinensis essential oil weighed 347.6 grams compared to 312.2 grams in control birds, an 11% increase in growth rate, according to the 2026 Journal of Animal Science study.
Breast meat from chickens fed 320 mg/kg of Mosla chinensis essential oil required 25% less force to cut (18.01 N versus 24.15 N) and showed 17% lower spoilage markers compared to control birds in the 2026 poultry study.
The 2026 research found that Mosla chinensis essential oil at 80 mg/kg reduced oxidative damage markers in chicken blood from 2.24 to 1.21 nanomoles per milliliter, a 46% decrease in cellular stress indicators.
The Quick Take
- What they studied: Whether adding an essential oil from a medicinal plant called Mosla chinensis to chicken feed would improve how fast chickens grow, protect their bodies from damage, and make their meat better quality.
- Who participated: 1,008 one-day-old yellow-feathered chickens (a breed commonly raised in Asia) divided into seven groups receiving different feed treatments over 52 days.
- Key finding: Chickens fed moderate doses of the plant oil (80-160 mg per kilogram of feed) grew about 11% faster in their first three weeks and needed 7% less feed to gain the same amount of weight compared to control chickens.
- What it means for you: If you eat chicken, this research suggests that farmers could use natural plant additives to produce healthier, more tender meat without antibiotics or synthetic chemicals. However, this study was done in a controlled farm setting, so results may vary in real-world conditions.
The Research Details
Scientists divided 1,008 newly hatched chickens into seven equal groups. One group ate regular feed (control), one group ate feed with oregano oil as a comparison, and five groups ate feed with different amounts of Mosla chinensis essential oil (40, 80, 160, 320, or 640 mg per kilogram). The chickens were raised for 52 days under identical conditions. Researchers measured how fast the chickens grew, how much feed they needed, blood chemistry markers, meat quality, and the types of bacteria in their digestive systems.
The researchers used statistical tests to determine which dose worked best and whether higher doses were better than lower ones. They looked for patterns in the data to find the “sweet spot” where the oil had the strongest positive effects.
This type of study is called a dose-response trial because it tests multiple amounts of a substance to find the optimal level, similar to how doctors test different medication doses to find what works best.
Testing multiple doses is important because too little of something might not work, while too much could be wasteful or even harmful. By testing five different amounts, the researchers could identify the most effective dose—in this case, 160 mg per kilogram—which is crucial information for farmers considering using this additive.
This study has several strengths: it included a large number of animals (1,008 chickens), used proper statistical methods, included a positive control (oregano oil) to compare against, and measured multiple outcomes (growth, blood chemistry, meat quality, and gut bacteria). The study was conducted under controlled conditions, which means results were likely accurate. However, because it was done in a research facility, results might differ slightly on commercial farms with different conditions.
What the Results Show
During the first three weeks of life, chickens receiving 80-160 mg/kg of the plant oil weighed about 35 grams more than control chickens (334.9-347.6 grams versus 312.2 grams). They also needed less feed to gain each pound of weight—a 7% improvement in feed efficiency. This matters because feed is the biggest cost in chicken farming, so using less feed while growing the same amount saves money.
Over the entire 52-day period, the improvement in feed efficiency continued, with the best-performing group (160 mg/kg) needing 2.25 units of feed per unit of weight gain compared to 2.36 in control birds. While this sounds small, it represents significant savings across thousands of birds.
Blood chemistry improved at the moderate doses. Markers of oxidative damage (cellular stress) were lower, while antioxidant enzymes—the body’s natural defense system—were higher. Specifically, a marker called MDA (which indicates cellular damage) dropped from 2.24 to 1.21 nanomoles per milliliter in the best-performing group.
Meat quality improved noticeably. Breast meat from chickens receiving the oil was more tender (required less force to cut), lost less moisture during storage, and stayed fresher longer (measured by lower levels of compounds that indicate spoilage).
The plant oil modified the types of bacteria living in the chickens’ digestive systems, specifically enriching bacteria that produce beneficial short-chain fatty acids. These fatty acids help maintain intestinal health and may improve overall immune function. The antioxidant enzymes improved not just in blood but also in the intestinal lining, suggesting the oil protected the entire digestive system from damage.
This research builds on growing evidence that plant-derived essential oils can improve poultry performance. Previous studies showed that oregano oil (the positive control used here) has antioxidant and antimicrobial properties. This study demonstrates that Mosla chinensis oil performs similarly or better than oregano oil in several measures, suggesting it could be a viable alternative for farmers seeking natural feed additives.
This study was conducted in a controlled research environment with specific chicken breeds and feed formulations. Results might differ on commercial farms with different conditions, feed types, or chicken breeds. The study lasted 52 days, which is the typical market age for chickens, but we don’t know if benefits would continue longer. The researchers didn’t test whether the oil would work in combination with other additives or in different climates. Additionally, while the study measured many health markers, it didn’t evaluate whether consumers could taste or detect differences in the meat.
The Bottom Line
Based on this research, farmers raising yellow-feathered chickens could consider adding Mosla chinensis essential oil at 80-160 mg per kilogram of feed, with 160 mg/kg showing the best overall results. This recommendation has moderate-to-strong evidence from a well-designed study. However, farmers should start with smaller amounts to ensure the additive works in their specific conditions and consult with poultry nutritionists before making large-scale changes.
Chicken farmers and poultry producers should care about this research because it offers a natural way to improve profitability (through better feed efficiency) and product quality. Consumers interested in higher-quality chicken meat or those preferring products raised with natural additives rather than antibiotics should also find this relevant. This research is specific to yellow-feathered chickens, so results may not apply to other chicken breeds used in Western countries.
Benefits appeared quickly—within the first three weeks, chickens showed improved growth rates. Improvements in meat quality and antioxidant status were measurable by day 52 (market age). If a farmer implemented this change, they could expect to see improved feed efficiency and meat quality in their next flock within the same timeframe.
Frequently Asked Questions
Can I use Mosla chinensis oil in my chicken feed to improve meat quality?
Research shows that adding 160 mg/kg of Mosla chinensis essential oil to chicken feed improved meat tenderness, reduced moisture loss, and extended freshness in a 2026 study of 1,008 birds. However, results may vary based on your specific conditions, breed, and feed formulation, so consult a poultry nutritionist before implementing this change.
How much does Mosla chinensis essential oil improve chicken growth?
Chickens receiving 160 mg/kg of the oil grew 11% faster in their first three weeks and needed 5% less feed to gain weight over 52 days, according to the 2026 Journal of Animal Science study. This translates to significant cost savings for commercial operations.
Is Mosla chinensis oil safe for chickens?
The 2026 study found no safety concerns at doses up to 640 mg/kg, with optimal results at 160 mg/kg. The oil improved antioxidant defenses and beneficial gut bacteria, suggesting it protected rather than harmed the birds. However, always source from reputable suppliers and monitor your flock when introducing any new additive.
What makes Mosla chinensis oil better than oregano oil for chickens?
In the 2026 study, Mosla chinensis oil performed similarly to or better than oregano oil across multiple measures including feed efficiency, antioxidant status, and meat quality. Both are natural alternatives to synthetic additives, but Mosla chinensis showed slightly superior results in this research.
How long does it take to see improvements from adding this oil to chicken feed?
Benefits appeared within three weeks, with improved growth rates visible by day 21. Improvements in meat quality and antioxidant status were measurable by day 52 (market age). Farmers could expect to see results in their next flock within the same timeframe.
Want to Apply This Research?
- If you raise chickens or manage a poultry operation, track feed conversion ratio (amount of feed needed per pound of weight gain) weekly. Compare this metric before and after implementing the additive to quantify savings. Also track meat quality indicators like tenderness and moisture loss if processing your own birds.
- For farmers: Source Mosla chinensis essential oil from a reputable supplier and gradually introduce it into your feed at the recommended 160 mg/kg dose while monitoring bird health and performance. For consumers: Seek out chicken products labeled as raised with natural plant-based additives rather than synthetic growth promoters, and note any improvements in meat tenderness and freshness.
- Track feed consumption and bird weight weekly to calculate feed efficiency. Monitor meat quality metrics (tenderness, color, moisture retention) at processing. Keep records of any health issues or mortality rates to ensure the additive doesn’t cause unexpected problems. Compare your results to baseline data from before implementing the additive.
This research was conducted on yellow-feathered chickens in a controlled research setting and may not apply to all chicken breeds or commercial farm conditions. Before implementing any feed additive changes, consult with a licensed veterinarian or poultry nutritionist. This information is for educational purposes and should not replace professional agricultural or veterinary advice. Results may vary based on feed formulation, environmental conditions, and management practices. Always source additives from reputable suppliers and follow local regulations regarding feed additives in your region.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.