According to Gram Research analysis, a 2026 study of 440 pigs found that including 5 percent palm kernel meal in pig feed does not reduce growth performance, nutrient absorption, or meat quality compared to conventional diets. Pigs fed palm kernel meal gained weight at the same rate and converted feed into body weight equally well as control pigs over 6 to 10 weeks. However, the study was too small to detect small differences, so larger research is needed to confirm these preliminary findings.
Researchers tested whether adding palm kernel meal, a byproduct from palm oil production, to pig feed affects how well pigs grow and develop. They studied 440 pigs split into two groups: younger growing pigs and older finishing pigs. The pigs ate different types of feed, some made into powder form and others into pellets, with and without the palm kernel ingredient. After tracking the pigs for 6 to 10 weeks, the researchers found no meaningful differences in how the pigs performed, how well they digested their food, or the quality of their meat. However, the study wasn’t large enough to catch small differences, so more research is needed to confirm these results.
Key Statistics
A 2026 study of 440 crossbred pigs found no significant differences in growth performance when 5 percent palm kernel meal was added to pig diets compared to conventional feed, regardless of whether feed was processed as powder or pellets.
In a two-experiment trial with 220 growing pigs and 220 finishing pigs, researchers observed identical nutrient digestibility and carcass quality between pigs fed palm kernel meal and control pigs after 6 to 10 weeks of feeding.
The 2026 research acknowledged that statistical power was less than 80 percent, meaning the sample size may have been too small to detect small but meaningful differences in pig performance from palm kernel meal inclusion.
The Quick Take
- What they studied: Whether adding palm kernel meal (a cheap animal feed ingredient) to pig diets affects how well pigs grow, how much nutrition they absorb, and the quality of their meat.
- Who participated: 440 crossbred pigs in two separate experiments. The first group had 220 younger pigs averaging 25 kilograms at the start. The second group had 220 older pigs averaging 55 kilograms at the start. All pigs were raised in pens with five pigs each.
- Key finding: Pigs fed diets containing 5 percent palm kernel meal performed just as well as pigs fed regular diets, with no significant differences in growth, nutrient absorption, or meat quality after 6 to 10 weeks.
- What it means for you: Farmers might be able to use palm kernel meal as a cheaper feed ingredient without hurting pig health or meat quality. However, the study wasn’t large enough to detect small differences, so more research is needed before making final recommendations.
The Research Details
The researchers conducted two separate experiments with pigs at different life stages. In the first experiment, 220 younger pigs (about 9 weeks old) were divided into four groups and fed different combinations of feed types and ingredients for 6 weeks. In the second experiment, 220 older pigs (about 15 weeks old) were similarly divided and fed for 10 weeks. Each group had 11 pens with 5 pigs per pen. The researchers tested two main variables: the form of the feed (powder versus pellets) and whether the diet included 5 percent palm kernel meal or not. This setup allowed them to see if either factor alone or in combination affected how the pigs performed.
The researchers measured several outcomes including how much weight the pigs gained, how efficiently they converted feed into body weight, how well they digested their nutrients, and the quality of their meat at the end of the study. They collected data on feed intake, weight gain, and digestibility of key nutrients like protein and energy. For the finishing pigs, they also evaluated carcass quality, which refers to the meat characteristics that determine its value.
This type of study design, called a factorial experiment, is useful because it allows researchers to test multiple factors at once and see how they interact with each other. By using this approach, the team could determine whether feed form, palm kernel meal, or a combination of both affected pig performance.
This research matters because the livestock industry is always looking for affordable, sustainable feed ingredients that don’t compromise animal health or product quality. Palm kernel meal is a byproduct of palm oil processing, making it cheaper and more sustainable than traditional feed ingredients like soybean meal. If palm kernel meal works just as well as conventional ingredients, farmers could reduce feed costs and support more sustainable agriculture. The study also examined how different feed processing methods affect nutrient availability, which helps farmers optimize their feeding strategies.
The researchers acknowledge an important limitation: their study had less than 80 percent statistical power, meaning the sample size was too small to reliably detect small differences between groups. This is a significant weakness because small but meaningful differences in pig performance could have been missed. The study was well-designed with proper controls and multiple replicates, which strengthens the reliability of the findings. However, the authors themselves recommend that larger studies with more pigs are needed to confirm these preliminary results and clarify whether palm kernel meal truly has no effect on pig performance.
What the Results Show
In the first experiment with growing pigs, researchers found no statistically significant differences in growth performance or nutrient digestibility between pigs fed palm kernel meal and those fed regular diets, regardless of whether the feed was in powder or pellet form. The pigs gained weight at similar rates, consumed similar amounts of feed, and converted that feed into body weight with equal efficiency across all four treatment groups.
In the second experiment with finishing pigs, the results were consistent. Pigs fed diets containing 5 percent palm kernel meal performed identically to control pigs on measures of growth, feed efficiency, nutrient digestibility, and carcass quality. The form of the feed (powder versus pellets) also made no meaningful difference in any of these outcomes. The researchers measured digestibility of key nutrients including dry matter, crude protein, and energy, and found no significant differences between groups.
These findings suggest that palm kernel meal can be included in pig diets at the 5 percent level without negatively affecting how well pigs grow or how their bodies develop. The lack of differences across both younger and older pigs indicates that the ingredient works similarly regardless of the pig’s age or stage of production.
The study also examined whether the processing method of corn and other feed ingredients affected results. Researchers tested both mash (powder) and crumble (pellet) forms of feed, but found no significant interactions between feed form and palm kernel meal inclusion. This suggests that farmers have flexibility in how they process their feed without worrying that it will interact negatively with palm kernel meal. The consistency of results across both experiments strengthens confidence that palm kernel meal is a reliable ingredient option.
This research aligns with previous studies suggesting that palm kernel meal can be used in livestock diets without major performance penalties. However, most prior research focused on single factors or smaller sample sizes. This study’s contribution is testing palm kernel meal alongside different feed processing methods in a controlled factorial design. The findings support the growing body of evidence that alternative feed ingredients derived from agricultural byproducts can help reduce feed costs while maintaining animal performance, though more research is needed to establish optimal inclusion rates and long-term effects.
The most critical limitation is insufficient statistical power. The researchers had less than 80 percent power to detect differences, meaning the study may have been too small to catch real but small effects of palm kernel meal on pig performance. This is especially important because small improvements or declines in feed efficiency can have significant economic impacts for farmers. Additionally, the study only tested one inclusion level of palm kernel meal (5 percent), so it’s unclear whether higher or lower levels would produce different results. The study was also conducted in a controlled research setting, which may not fully reflect real-world farm conditions. Finally, the study only measured short-term effects (6 to 10 weeks), so long-term impacts on pig health or meat quality remain unknown.
The Bottom Line
Based on this preliminary evidence, farmers may consider including palm kernel meal at 5 percent in pig diets as a cost-saving measure, but should do so cautiously and monitor pig performance closely. The confidence level is moderate because the study had statistical limitations. Farmers should not make major feed changes based solely on this research. Instead, they should wait for larger, more definitive studies or conduct their own small-scale trials on their farms. If using palm kernel meal, farmers should track pig growth rates, feed intake, and meat quality to ensure performance remains acceptable.
This research is most relevant to pig farmers and feed manufacturers looking to reduce production costs through alternative ingredients. Veterinarians advising on pig nutrition should be aware of these findings. Consumers interested in sustainable agriculture may appreciate that this research supports using agricultural byproducts in animal feed. However, this research should not influence individual consumers’ food choices, as it addresses only one ingredient in a complex feed system. People with allergies or sensitivities to palm products should note that this research involves palm kernel meal in animal feed, not direct human consumption.
The effects measured in this study appeared within 6 to 10 weeks, which is the typical timeframe for observing changes in pig growth and development. If a farmer were to switch to palm kernel meal-based feed, they could expect to see whether it works for their operation within one production cycle (roughly 2 to 3 months for growing pigs, 3 to 4 months for finishing pigs). However, longer-term effects on meat quality, reproductive performance, or animal health would require monitoring over multiple production cycles.
Frequently Asked Questions
Is palm kernel meal safe to feed to pigs?
Research shows that palm kernel meal at 5 percent inclusion levels does not harm pig growth, health, or meat quality over 6 to 10 weeks. However, long-term safety data and effects at higher inclusion levels remain unclear, so farmers should monitor pigs closely when introducing this ingredient.
Does palm kernel meal affect how much weight pigs gain?
A 2026 study of 440 pigs found no significant differences in weight gain between pigs fed palm kernel meal and those on conventional diets. Both groups gained weight at similar rates and converted feed into body weight equally efficiently.
Can I mix palm kernel meal with different types of pig feed?
Research indicates that palm kernel meal works equally well whether mixed into powder or pellet feed forms. The type of feed processing did not affect how pigs performed or digested nutrients when palm kernel meal was included.
How much money could farmers save by using palm kernel meal?
The study did not calculate cost savings, but palm kernel meal is generally cheaper than soybean meal. Actual savings depend on local ingredient prices and feed formulation, so farmers should consult a nutritionist to calculate potential cost reductions for their specific operation.
What does this research mean for meat quality?
The 2026 study found no differences in carcass quality between pigs fed palm kernel meal and control pigs. Meat characteristics that determine value remained identical across all treatment groups after 10 weeks of feeding.
Want to Apply This Research?
- Track weekly pig weight gain and feed consumption rates when transitioning to palm kernel meal-based diets. Record the average daily gain (target: 0.6 to 0.9 kilograms per day for growing pigs) and feed conversion ratio (target: 2.5 to 3.5 kilograms of feed per kilogram of weight gain) to compare against baseline performance on previous diets.
- If managing a farm operation, implement a gradual transition to palm kernel meal by mixing it into existing feed at increasing percentages over 7 to 10 days, starting at 2 percent and reaching 5 percent. Monitor pig behavior, appetite, and digestion during this transition period. Record any changes in feed refusal, water intake, or visible health issues.
- Establish a baseline of current performance metrics before switching feeds. After introducing palm kernel meal, track the same metrics weekly for at least one full production cycle. Compare final pig weights, feed costs, and carcass quality between the old and new feed systems. Document any unexpected changes in pig health, behavior, or product quality to share with a veterinarian or nutritionist.
This research is preliminary and has acknowledged statistical limitations. The findings represent one study with a sample size that may have been too small to detect small differences. Before making changes to pig feeding programs, consult with a veterinarian or animal nutritionist. This information is for educational purposes and should not replace professional agricultural or veterinary advice. Individual farm results may vary based on local conditions, pig genetics, and management practices. Farmers should conduct their own trials or wait for larger confirmatory studies before making major feed changes based on this research.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.