Research shows that adding 0.6% bottle gourd leaf powder to lamb feed significantly improves growth performance, immune function, and intestinal health within 90 days. According to Gram Research analysis of this controlled study with 24 lambs, supplemented animals showed enhanced antioxidant defense systems, increased growth hormone activity, and improved nutrient absorption compared to unsupplemented lambs, suggesting this plant powder could be a natural, safe way to boost livestock health.
Researchers tested whether adding bottle gourd leaf powder to lamb feed could improve their health and growth. According to Gram Research analysis, lambs that received the supplement showed better muscle growth, stronger immune systems, and improved gut health compared to lambs on regular feed. The study found that the highest dose of the supplement (0.6%) worked best, boosting the lambs’ natural defense systems and helping their intestines absorb nutrients more efficiently. These findings suggest the plant powder could be a natural way to keep farm animals healthier without using medications.
Key Statistics
A 2026 research study of 24 Ossimi lambs found that supplementing feed with 0.6% bottle gourd leaf powder significantly enhanced growth performance, immune response, and antioxidant defense compared to unsupplemented control lambs over a 90-day period.
In a controlled trial with 24 lambs, those receiving 0.6% bottle gourd leaf powder supplementation showed increased intestinal villus height and goblet cell numbers, indicating improved nutrient absorption and gut barrier function.
Research on 24 lambs demonstrated that bottle gourd leaf powder supplementation upregulated growth-related genes (GH and IGF-1) and immunity genes (TLR-7, IL-6, and IL-1β), with the strongest effects at the 0.6% dose level.
A 2026 study found that lambs receiving 0.6% bottle gourd leaf powder showed reduced liver enzyme levels, suggesting potential hepatoprotective (liver-protecting) effects without adverse health impacts.
The Quick Take
- What they studied: Whether adding bottle gourd leaf powder to lamb feed improves their growth, immune system strength, and overall health
- Who participated: 24 young male Ossimi lambs (a breed from Egypt) between 10-12 months old, weighing about 32-33 kg each, divided into four equal groups
- Key finding: Lambs receiving 0.6% bottle gourd leaf powder in their diet showed significantly better growth, stronger immune responses, and improved intestinal health compared to lambs on regular feed
- What it means for you: This research suggests bottle gourd leaf powder could be a natural, safe supplement for livestock farmers to improve animal health and meat quality, though more research in different settings is needed before widespread use
The Research Details
Scientists divided 24 young lambs into four equal groups of six lambs each. One group received regular feed with no supplement (the control group), while the other three groups received feed mixed with increasing amounts of bottle gourd leaf powder: 0.2%, 0.4%, and 0.6%. All lambs ate their assigned diets for 90 days (about three months). Throughout the study, researchers collected blood samples to measure immune function, antioxidant levels (the body’s natural defense against damage), and liver health. At the end, they examined the lambs’ intestinal tissues under a microscope to see if the supplement changed their structure and function.
This research design is important because it allows researchers to directly compare the effects of different doses of the supplement. By testing multiple dose levels, scientists can identify the most effective amount without wasting resources. The 90-day timeframe is long enough to see real changes in the lambs’ bodies and health markers. Examining both blood work and tissue samples provides a complete picture of how the supplement affects the whole animal.
The study used a randomized design, meaning lambs were randomly assigned to groups to prevent bias. The researchers measured multiple health markers (blood tests, tissue examination, gene activity) rather than relying on a single measure, which strengthens confidence in the results. However, the study was conducted only on one breed of lambs in one location, so results may not apply equally to all sheep breeds or environments. The relatively small sample size (24 lambs total) means results should be confirmed with larger studies before making major farming decisions.
What the Results Show
Lambs receiving bottle gourd leaf powder showed measurable improvements across multiple health measures. Their growth performance improved, meaning they gained weight faster and developed muscle more efficiently than lambs on regular feed. Blood tests showed stronger immune responses, with increased activity of disease-fighting cells and antibodies. The lambs’ natural antioxidant defense systems—the body’s built-in protection against cellular damage—were significantly enhanced, particularly at the highest supplement dose of 0.6%.
When researchers examined the lambs’ intestines under a microscope, they found that supplemented lambs had taller intestinal villi (tiny finger-like structures that absorb nutrients) and more goblet cells (which produce protective mucus). These changes suggest the supplement improved the lambs’ ability to absorb nutrients and maintain a healthy gut barrier. The improvements were most pronounced in lambs receiving the 0.6% dose, suggesting a dose-response relationship where more supplement produced better results—up to a point.
Gene expression analysis revealed that specific genes related to growth and immunity were activated at higher levels in supplemented lambs. Growth hormone (GH) and insulin-like growth factor (IGF-1)—natural chemicals that control muscle development—showed increased activity. Immune-related genes including TLR-7, IL-6, and IL-1β were also upregulated, meaning the lambs’ bodies produced more of these protective substances. Liver enzyme levels decreased in supplemented groups, suggesting the supplement may protect liver function rather than stress it. Histopathological examination (detailed tissue analysis) showed normal liver structure and enhanced immune activity in the spleen, the body’s main immune organ.
This research builds on existing knowledge that plant-based supplements can support animal health. Previous studies have shown that various plant extracts can boost immune function and reduce oxidative stress in livestock. This study is notable because it systematically tests different doses of bottle gourd leaf powder and measures effects across multiple biological systems—growth, immunity, antioxidant defense, and tissue structure. The findings align with traditional use of bottle gourd in some cultures for health purposes, providing scientific validation for what some farmers have observed anecdotally.
The study was conducted on only one breed of lambs (Ossimi) in one location, so results may not apply equally to other sheep breeds or different climates. The sample size of 24 lambs is relatively small; larger studies would provide more confidence in the findings. The study lasted 90 days, which is moderate-term; longer studies would show whether benefits persist over a full production cycle. The research doesn’t compare bottle gourd powder to other known supplements, so it’s unclear whether this plant is better, worse, or equivalent to existing options. Finally, the study was conducted in a controlled research setting; real-world farm conditions might produce different results.
The Bottom Line
Based on this research, adding 0.6% bottle gourd leaf powder to lamb feed appears safe and beneficial for growth and health (moderate-to-strong evidence from this controlled study). Farmers interested in trying this supplement should start with small amounts and monitor their lambs’ health and growth. Before making large-scale changes, farmers should consult with veterinarians and consider conducting small pilot tests on their own farms, since results may vary based on local conditions, water quality, and feed composition.
Livestock farmers raising sheep, particularly those interested in natural supplements and sustainable farming practices, should find this research relevant. Veterinarians advising on animal nutrition may want to consider this option for clients. Producers focused on premium meat quality or organic certification might be especially interested. However, farmers in regions where bottle gourd isn’t readily available or affordable may find this impractical. This research is less relevant to people who don’t raise livestock, though it may interest those studying plant-based animal nutrition or sustainable agriculture.
Based on this 90-day study, farmers could expect to see measurable improvements in lamb growth within 2-3 months of starting supplementation. Immune system strengthening likely occurs gradually over the first month, with continued improvements through the 90-day period. Visible changes in coat quality and overall health appearance might be noticeable within 4-6 weeks. However, individual lambs may respond differently, and results depend on overall diet quality, water availability, and management practices.
Frequently Asked Questions
Can bottle gourd leaf powder really improve lamb growth and health?
Research shows that 0.6% bottle gourd leaf powder in lamb feed significantly improved growth, immune function, and intestinal health over 90 days. Blood tests showed stronger immune responses and better antioxidant defense. However, this was one study on one lamb breed, so results may vary in different settings.
What dose of bottle gourd powder is safe for lambs?
The study tested 0.2%, 0.4%, and 0.6% supplementation levels, with 0.6% showing the best results and no signs of toxicity or harm. This suggests the supplement is safe at these doses, but farmers should consult veterinarians before using it and monitor their animals for any adverse effects.
How long does it take to see improvements from bottle gourd supplementation?
In this 90-day study, lambs showed measurable improvements in growth and immune markers within the three-month period. Visible health improvements might appear within 4-6 weeks, though individual lambs may respond at different rates depending on overall diet and management.
Is bottle gourd leaf powder better than other livestock supplements?
This study didn’t compare bottle gourd powder to other supplements, so it’s unclear whether it’s better or worse than existing options. The research shows it works, but farmers should compare cost, availability, and effectiveness with other supplements available in their region.
Can this supplement be used for other types of livestock besides lambs?
This study tested only Ossimi lambs, so results may not apply to other sheep breeds, goats, cattle, or other animals. Farmers interested in using it for different livestock should consult veterinarians and consider small pilot tests before widespread use.
Want to Apply This Research?
- Track weekly weight gain (in pounds or kilograms) and monthly feed conversion ratio (pounds of feed needed to gain one pound of body weight) for lambs receiving the supplement versus control lambs to measure growth performance objectively
- If using a livestock management app, log daily supplement amounts added to feed batches, note any visible health changes (coat quality, energy level, appetite), and record blood test results when available to monitor immune and antioxidant markers over time
- Establish baseline measurements before starting supplementation (weight, body condition score, feed intake), then measure the same metrics every 2-4 weeks throughout the 90-day trial period to track whether improvements match the research findings
This research describes results from a controlled study on lambs and should not be considered medical advice for human consumption or a substitute for veterinary guidance. Farmers considering supplementing their animals’ diet should consult with a veterinarian or animal nutritionist before making changes. Results may vary based on animal breed, age, overall diet quality, environmental conditions, and management practices. This single study, while promising, should be confirmed with additional research before widespread commercial adoption. Always follow local regulations regarding animal feed additives and supplements.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.
