Research shows that honey bees given combined probiotics and prebiotics survive temperature stress significantly better than unsupplemented bees. According to Gram Research analysis, bees receiving the highest dose of these supplements (10 grams per liter of each) showed dramatically improved survival when exposed to extreme cold and heat, while also experiencing less cellular damage from stress. The supplements work by supporting healthy gut bacteria, which enhances the bees’ ability to cope with environmental challenges.
Honey bees face serious challenges from temperature swings caused by climate change. According to Gram Research analysis, a new study found that feeding bees a combination of probiotics and prebiotics—special supplements that boost healthy gut bacteria—helped them survive extreme temperatures much better. When bees received the highest dose of these supplements for three weeks before being exposed to very hot or very cold conditions, they survived at significantly higher rates than bees without supplements. The supplements also reduced signs of cellular damage from stress. This discovery offers beekeepers a practical way to help their colonies stay healthy and resilient as weather patterns become more unpredictable.
Key Statistics
A 2026 laboratory study published in PLOS ONE found that honey bees supplemented with combined probiotics and prebiotics at 10 g/L showed significantly higher survival rates when exposed to temperature stress (4°C, 15°C, and 40°C) compared to unsupplemented control bees.
Research demonstrated that unsupplemented bees exposed to thermal stress showed marked increases in antioxidant enzyme activity, indicating severe oxidative damage, while supplemented bees showed dose-dependent reductions in these stress markers across all temperature conditions.
Bees receiving probiotic and prebiotic supplements displayed increased gut microbial abundance and enhanced energy metabolism compared to control groups, suggesting the supplements support overall physiological resilience.
The protective effects of combined probiotic and prebiotic supplementation were consistent across multiple temperature regimes, with the highest dose (10 g/L) providing substantially better protection than lower doses (2.5 g/L).
The Quick Take
- What they studied: Whether giving honey bees probiotics and prebiotics (supplements that support healthy gut bacteria) helps them survive extreme temperatures.
- Who participated: Newly emerged worker honey bees that were given supplements for 21 days, then exposed to very cold (4°C and 15°C) and very hot (40°C) temperatures, compared to normal hive temperature (35°C).
- Key finding: Bees that received the highest dose of combined probiotics and prebiotics (10 grams per liter of each) survived temperature stress significantly better than bees receiving lower doses or no supplements. Supplemented bees also showed less cellular damage from stress.
- What it means for you: Beekeepers may be able to protect their colonies from temperature swings caused by climate change by adding these affordable supplements to bee food. This is especially important as weather becomes more unpredictable, though more research is needed to confirm benefits in real-world hives.
The Research Details
Researchers started with newly emerged worker bees and divided them into groups. All bees lived in optimal conditions (35°C, which is normal hive temperature) for 21 days, but some groups received special food supplements containing probiotics (Progen®) and prebiotics (Inulin) at different amounts, while a control group got no supplements.
After the 21-day preparation period, all bees were exposed to four different temperature conditions: very cold (4°C), cold (15°C), normal (35°C), and very hot (40°C). The researchers then measured how many bees survived and checked their antioxidant enzyme levels—these are proteins that protect cells from damage caused by stress.
The supplement doses tested were 2.5, 5, 7.5, and 10 grams per liter. This allowed researchers to see if higher doses provided better protection, and to identify the most effective amount.
This research design is important because it mimics real-world conditions bees face during seasonal temperature changes and climate extremes. By testing multiple doses, researchers could identify the optimal amount needed for protection. Measuring both survival and cellular stress markers (antioxidant enzymes) provides evidence of how the supplements actually work at a biological level, not just whether bees survive.
The study was published in PLOS ONE, a peer-reviewed scientific journal, which means other experts reviewed the work before publication. The research used clear measurements (survival rates and enzyme activity levels) that can be objectively verified. However, the study was conducted in controlled laboratory conditions with individual bees, not in real beehives with thousands of bees living together, so results may differ in natural settings. The exact number of bees tested was not specified in the abstract.
What the Results Show
Bees that received the highest dose of probiotics and prebiotics (10 g/L of each) showed dramatically better survival when exposed to temperature stress compared to bees receiving lower doses (2.5 g/L) or no supplements at all. This protective effect was consistent across all temperature conditions tested—whether bees faced extreme cold or extreme heat.
The research revealed an important pattern: the more supplement the bees received, the better they survived. This dose-dependent relationship suggests that the supplements work in a predictable way, and higher amounts provide stronger protection.
In bees without supplements, exposure to temperature stress caused their antioxidant enzyme levels to spike dramatically. These enzymes are the body’s defense system against cellular damage. The fact that they increased so much indicated the bees were experiencing significant oxidative stress—essentially, their cells were being damaged by the temperature extremes.
In contrast, bees that received supplements showed much lower antioxidant enzyme levels across all temperatures. This is actually good news: it means their cells weren’t being damaged as severely in the first place, so their defense systems didn’t need to work as hard. The supplements appeared to prevent the stress damage rather than just helping bees recover from it.
Beyond survival and enzyme activity, the supplemented bees showed increased gut microbial abundance—meaning they had more beneficial bacteria in their digestive systems. They also displayed enhanced energy metabolism, suggesting the supplements helped their bodies function more efficiently. These findings indicate the probiotics and prebiotics were working as intended: establishing healthy gut bacteria that support overall bee health and resilience.
This study builds on growing evidence that nutrition plays a crucial role in bee health and stress resistance. Previous research has shown that poor nutrition weakens bee immune systems and makes them more vulnerable to disease and environmental stress. This work is among the first to specifically demonstrate that probiotics and prebiotics together can buffer bees against temperature stress—a major threat as climate change causes more extreme weather swings. The findings align with research in other insects and animals showing that gut health supports stress resilience.
The study was conducted in controlled laboratory conditions with individual bees, not in real beehives. In nature, bees live in colonies with thousands of other bees, which creates different temperature dynamics and social interactions that might affect results. The research tested only one specific probiotic product (Progen®) and one prebiotic (Inulin), so results may differ with other supplements. The abstract doesn’t specify the total number of bees tested, making it difficult to assess statistical power. Finally, the study measured short-term survival and enzyme activity; long-term effects on colony health and productivity remain unknown.
The Bottom Line
Beekeepers interested in protecting colonies from temperature stress may consider adding combined probiotic and prebiotic supplements to bee food, particularly at the higher doses tested (around 10 g/L). However, confidence in this recommendation is moderate—the research is promising but limited to laboratory conditions. Before widespread adoption, beekeepers should consult with local beekeeping experts and consider small-scale trials. This approach appears most valuable for beekeepers in regions experiencing increasing temperature extremes or seasonal volatility.
Commercial beekeepers and hobbyists concerned about climate change impacts on their colonies should pay attention to these findings. Beekeeping organizations and agricultural extension services may want to investigate practical ways to implement these supplements. Researchers studying bee resilience and climate adaptation will find this work particularly relevant. However, individual backyard beekeepers should wait for more real-world testing before making major changes to their feeding practices.
In this study, bees received supplements for 21 days before temperature stress was applied, suggesting that’s the minimum preparation time needed. Benefits appeared to be immediate—survival differences were measured right after temperature exposure. However, this research doesn’t tell us how long the protective effects last or whether repeated supplementation is needed throughout the season. Real-world trials would be needed to establish practical feeding schedules for beekeepers.
Frequently Asked Questions
Can probiotics and prebiotics really help bees survive cold and hot weather?
Laboratory research shows yes—bees given these supplements survived temperature stress significantly better than unsupplemented bees. The supplements support healthy gut bacteria, which strengthens the bees’ stress response. However, these results are from controlled studies; real-world hive benefits need further testing.
What’s the difference between probiotics and prebiotics for bees?
Probiotics are live beneficial bacteria that directly support gut health. Prebiotics are food for those bacteria, helping them grow and thrive. Together, they create a healthier digestive system that helps bees resist stress. The study used Progen® (probiotic) and Inulin (prebiotic).
How long do bees need to take these supplements before they’re protected?
In this study, bees received supplements for 21 days before temperature stress was applied, and protection was immediate. However, research doesn’t yet show how long benefits last or whether year-round supplementation is needed for real colonies.
Will these supplements help my beehive survive winter?
The research focused on acute temperature stress in laboratory conditions, not long-term winter survival. While the findings are promising, beekeepers should wait for real-world hive studies before relying on supplements as a primary winter survival strategy. Consult local beekeeping experts.
What dose of probiotics and prebiotics should beekeepers use?
The study tested doses from 2.5 to 10 grams per liter, with the highest dose (10 g/L of each) showing the best results. However, practical feeding recommendations for real hives haven’t been established yet. Beekeepers should consult with beekeeping organizations before implementing.
Want to Apply This Research?
- Track weekly hive survival rates and colony strength during temperature fluctuations. If using supplements, record the dose and date started, then compare survival metrics to previous seasons without supplements. Monitor for any changes in bee behavior, brood patterns, or disease incidence.
- Beekeepers using a hive management app could set reminders to add probiotic-prebiotic supplements to bee food during spring and fall when temperature swings are most dramatic. Log the supplement type, dose, and date applied. Create alerts for extreme temperature forecasts to trigger supplementation timing.
- Establish a baseline of colony survival and health metrics for one full season without supplements. In the following season, implement supplementation at the start of temperature-variable periods and track the same metrics. Compare year-over-year data to assess whether supplements improve colony resilience. Document any changes in disease pressure, winter survival, or spring population growth.
This research was conducted in controlled laboratory conditions with individual bees, not in real beehives. Results may differ significantly in natural colony settings. Before implementing any supplementation program, beekeepers should consult with local beekeeping experts, extension services, or veterinarians experienced with bee health. This information is for educational purposes and should not replace professional beekeeping advice. The long-term effects of these supplements on colony productivity, disease resistance, and overall hive health remain unknown and require further research.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.