Barley malt extract did not improve growth, weight gain, or immune health in young piglets, according to a 2026 study of 144 animals published in Tropical Animal Health and Production. Gram Research analysis found that piglets receiving up to 0.99% barley malt extract gained weight at the same rate as control piglets and showed no improvements in immune markers or intestinal health, though the supplement did cause minor shifts in gut bacteria composition.
Researchers tested whether adding barley malt extract, a natural supplement made from sprouted barley, could help young piglets grow faster and stay healthier after weaning. They fed 144 piglets different amounts of this supplement for six weeks and measured their growth, immune system strength, and gut bacteria. According to Gram Research analysis, the supplement didn’t significantly improve how fast the piglets grew, how much they ate, or how healthy their immune systems became. However, it did cause small changes in the types of bacteria living in their digestive systems, suggesting the supplement does affect the gut even if it doesn’t boost overall health.
Key Statistics
A 2026 research study of 144 weaned piglets found that dietary barley malt extract at levels up to 0.99% did not improve body weight gain, feed intake, or diarrhea incidence over a 42-day nursery period.
In a controlled trial with 144 piglets, barley malt extract supplementation produced no significant changes in immune cell populations, antioxidant enzyme activities, or short-chain fatty acid concentrations in fecal samples.
A 2026 study examining 144 piglets found that while barley malt extract altered specific gut bacteria taxa including Veillonellaceae and Mitsuokella, these microbial changes did not translate into improved growth performance or health outcomes.
The Quick Take
- What they studied: Whether adding barley malt extract, a natural food supplement, to piglet feed would help them grow faster, get sick less often, and develop stronger immune systems.
- Who participated: 144 newly weaned piglets that were about 24 days old and weighed around 7 kilograms at the start of the study. They were divided into four groups that received different amounts of barley malt extract for 42 days.
- Key finding: Barley malt extract at levels up to 0.99% did not improve growth rate, weight gain, food intake, or immune function in the piglets, though it did slightly change which bacteria lived in their guts.
- What it means for you: If you raise piglets, adding barley malt extract to their feed probably won’t help them grow bigger or stay healthier. However, the supplement does change gut bacteria in small ways, which might be worth studying more to see if it could help in other situations.
The Research Details
Scientists divided 144 young piglets into four equal groups. Each group received a slightly different diet: one group got no barley malt extract, while the other three groups got increasing amounts (0.33%, 0.66%, or 0.99% added to their feed). All piglets ate their assigned diet for 42 days, which covers the entire nursery period when piglets are most vulnerable after being separated from their mothers.
The researchers measured many things throughout the study. They tracked how much the piglets weighed, how much food they ate, and how often they got diarrhea. They also took blood samples and fecal samples to look at immune system markers, antioxidant enzymes (proteins that protect cells from damage), and the types of bacteria living in their digestive systems.
This type of study is called a controlled experiment because the researchers carefully controlled everything except the amount of barley malt extract. This design helps prove whether the supplement actually caused any changes or if changes happened by chance.
Testing supplements in controlled studies like this is important because farmers need to know which products actually work before spending money on them. By measuring many different health markers, not just weight gain, researchers can understand exactly how a supplement affects an animal’s body. Even when a supplement doesn’t improve overall growth, it might still affect the gut bacteria in ways that could matter for other reasons.
This study had several strengths: it included a large number of animals (144 piglets), tested multiple dose levels to see if more supplement meant better results, and measured many different health markers rather than just one outcome. However, the study only looked at one type of piglet breed and one farm setting, so results might differ in other situations. The researchers used standard scientific methods for measuring bacteria and immune markers, which makes the results reliable.
What the Results Show
The barley malt extract did not help piglets grow faster or gain more weight, no matter which dose level they received. Piglets eating the supplement gained weight at the same rate as piglets eating regular feed. The amount of food they ate was also similar across all groups. During most of the study period, there were no differences in how often piglets got diarrhea between groups.
When researchers looked at feed conversion ratio, which measures how much food a piglet needs to eat to gain one pound of weight, they found a small change during one phase of the study (the pre-starter II phase), but this difference disappeared when they looked at the entire 42-day period. This suggests the effect was temporary and not important for overall performance.
The supplement did not strengthen the piglets’ immune systems. Blood tests showed that immune cells and antioxidant enzymes were the same in all groups. This means the barley malt extract did not help piglets fight off infections or protect their cells from damage.
The most interesting finding was that barley malt extract did change which bacteria lived in the piglets’ guts, even though it didn’t improve their health. Specific types of bacteria called Veillonellaceae, Mitsuokella, and Mogibacterium were present in different amounts depending on how much supplement the piglets received. Short-chain fatty acids, which are beneficial compounds produced when bacteria break down food, were not affected by the supplement. The overall diversity of bacteria in the gut remained the same across all groups.
Previous research has shown that barley and barley products can sometimes help animals’ digestive health and immune function. However, this study suggests that barley malt extract specifically, at the doses tested, does not provide those benefits in young piglets. The changes in gut bacteria composition are interesting because they show the supplement does interact with the digestive system, but apparently not in ways that improve health outcomes. This finding suggests that not all barley products work the same way, and the specific processing method matters.
This study only tested one type of piglet and one farm setting, so results might be different for other breeds or farms. The researchers only measured health for 42 days, so they couldn’t see if longer-term effects might develop. They also didn’t test whether barley malt extract might help piglets that were sick or stressed, only healthy piglets in normal conditions. The study measured many different outcomes, which means some small differences might have happened by chance. Finally, the study didn’t explain why the supplement changed gut bacteria but didn’t improve health, so we don’t fully understand what’s happening in the piglets’ digestive systems.
The Bottom Line
Based on this research, barley malt extract is not recommended as a supplement to improve growth or health in nursery piglets. The evidence is strong that it doesn’t help at the doses tested (0.33% to 0.99%). However, the changes in gut bacteria suggest it might be worth studying in other situations, such as with sick piglets or different breeds. Farmers should focus on proven methods like good nutrition, clean housing, and proper weaning practices instead.
Pig farmers and feed manufacturers should pay attention to this research because it shows that barley malt extract won’t improve their piglets’ performance or health. Veterinarians advising farmers on supplements should know these results. Researchers studying gut health might find the bacterial changes interesting for future studies. Pet owners or people raising small numbers of piglets should know this supplement probably won’t help either.
This study ran for 42 days, which is the standard nursery period for piglets. If barley malt extract were going to help, researchers would have seen improvements within this timeframe. Farmers shouldn’t expect to see benefits even if they use the supplement for longer periods, based on this evidence.
Frequently Asked Questions
Does barley malt extract help piglets grow faster?
No. A 2026 study of 144 piglets found that barley malt extract at doses up to 0.99% did not improve body weight gain, average daily gain, or feed intake compared to piglets receiving regular feed over 42 days.
Can barley malt extract strengthen a piglet’s immune system?
Research shows barley malt extract did not increase immune cell populations or antioxidant enzyme activity in piglets. Blood tests revealed no differences in immune markers between piglets receiving the supplement and control piglets.
Does barley malt extract reduce diarrhea in young piglets?
The supplement showed no consistent effect on diarrhea incidence throughout the nursery period. While barley malt extract did change some gut bacteria types, these changes did not translate into reduced digestive problems.
What did change when piglets ate barley malt extract?
Specific gut bacteria types, including Veillonellaceae, Mitsuokella, and Mogibacterium, were present in different amounts depending on supplement dose. However, these bacterial shifts did not improve the piglets’ overall health or growth.
Should I add barley malt extract to my piglet feed?
Based on current evidence, barley malt extract is not recommended for improving piglet growth or health. Focus instead on proven practices like proper nutrition, clean housing, and vaccination schedules, which have stronger evidence for supporting piglet development.
Want to Apply This Research?
- If using a livestock management app, track feed conversion ratio (pounds of feed per pound of weight gained) weekly for any piglets receiving supplements. This metric revealed the only measurable change in this study and is easy to calculate from standard farm records.
- Rather than adding barley malt extract to feed, focus the app on tracking proven practices: recording vaccination dates, monitoring water quality, tracking diarrhea incidents daily, and logging feed quality. These factors have stronger evidence for improving piglet health.
- Set up weekly weight checks and feed intake measurements in your app to monitor overall growth performance. If you’re testing any new supplement, use this same tracking method to see if it actually improves your results compared to your baseline data from piglets not receiving the supplement.
This research applies specifically to nursery piglets under the conditions tested in this study. Results may not apply to other animal species, different piglet breeds, or different farm environments. Barley malt extract may have different effects on sick or stressed piglets compared to healthy ones. Before making changes to animal feed or supplementation programs, consult with a veterinarian or animal nutritionist who understands your specific situation. This article summarizes research findings and should not replace professional veterinary or nutritional advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.