A 2026 research study found that adding 1% Biophytum sensitivum (Sensitive Plant) to tilapia fish feed increased survival rates from 45% to 73% when fish were exposed to harmful bacteria. According to Gram Research analysis, the supplement boosted immune system markers including antibodies and infection-fighting proteins, with the 1% dose proving more effective than higher concentrations, suggesting an optimal supplement level exists for maximum immune benefits.
Researchers tested whether a plant called Biophytum sensitivum (also known as the Sensitive Plant) could help Nile tilapia fish grow better and fight off infections. They fed 300 fish either regular food or food mixed with different amounts of this plant for 56 days, then exposed them to a harmful bacteria. Fish that ate food with 1% plant supplement showed the strongest immune response, with 73% surviving the infection compared to only 45% of fish eating regular food. The plant appeared to activate the fish’s natural defense systems and reduce damage from the infection.
Key Statistics
A 2026 research study of 300 Nile tilapia found that fish fed food containing 1% Biophytum sensitivum supplement achieved a 73.3% survival rate when exposed to S. agalactiae bacteria, compared to 45% survival in unsupplemented control fish.
According to research reviewed by Gram, tilapia receiving 1% Biophytum sensitivum supplement showed significantly higher lysozyme activity, respiratory burst activity, and antibody levels compared to control fish, indicating stronger immune system activation.
A 2026 fish study demonstrated that the 1% Biophytum sensitivum dose was more effective than 2% or 4% doses, with 2% achieving 70% survival and 4% achieving only 56.6% survival against bacterial infection, suggesting an optimal supplement concentration exists.
Research on 300 tilapia found that Biophytum sensitivum supplementation activated immune-related genes (IL-8, TNF-α, and IgM) and reduced tissue damage from bacterial infection compared to unsupplemented fish.
The Quick Take
- What they studied: Whether adding a plant supplement called Biophytum sensitivum to fish food would help the fish grow better, build stronger immune systems, and survive bacterial infections
- Who participated: 300 young Nile tilapia fish (averaging 15 grams each) divided into four groups: one control group eating regular food and three treatment groups eating food with 1%, 2%, or 4% of the plant supplement mixed in
- Key finding: Fish eating food with 1% plant supplement had a 73% survival rate when exposed to harmful bacteria, compared to only 45% survival in fish eating regular food—a 28 percentage point improvement
- What it means for you: This research suggests that natural plant supplements might help boost immune systems in farmed fish, potentially reducing the need for antibiotics. However, this study was done in fish, not humans, so we cannot directly apply these findings to human health without further research
The Research Details
Scientists divided 300 young tilapia fish into four equal groups of 75 fish each (25 fish per tank, repeated three times for reliability). One group ate normal fish food (the control group), while the other three groups ate food mixed with increasing amounts of Biophytum sensitivum plant powder—1%, 2%, or 4% by weight. All fish ate their assigned diets for 56 days (about 8 weeks). After this feeding period, all fish were exposed to a harmful bacteria called S. agalactiae and monitored for 21 days to see how many survived and how well their bodies fought the infection.
The researchers measured multiple indicators of immune health, including special proteins called lysozyme and antibodies that help fight infections, as well as genes that control immune responses. They also examined tissue samples under a microscope to see if the plant supplement reduced damage from the bacterial infection.
This research design is important because it tests whether a natural supplement can improve both growth and disease resistance in a real-world farming scenario. By using multiple dose levels (1%, 2%, and 4%), the researchers could identify the optimal amount of supplement needed. The 21-day infection challenge is particularly valuable because it shows whether immune improvements actually translate into better survival when fish face a real threat.
The study used proper scientific controls (a group with no supplement for comparison) and repeated each treatment three times to ensure results were reliable. The researchers measured multiple immune markers rather than relying on a single indicator, which strengthens confidence in the findings. However, the study was conducted only in fish, so results may not apply to other animals or humans. The paper does not specify exact sample sizes for some analyses, which is a minor limitation.
What the Results Show
Fish that received 1% Biophytum sensitivum supplement showed the strongest overall benefits. Their immune system markers—including lysozyme activity, respiratory burst activity, and antibody levels—were significantly higher than control fish. When challenged with the harmful bacteria, 73.3% of fish in the 1% supplement group survived, compared to only 45% in the control group. This 28-percentage-point difference is substantial and suggests the supplement genuinely strengthened the fish’s ability to fight infection.
Interestingly, the 2% and 4% supplement doses were less effective than the 1% dose. Fish receiving 2% supplement had a 70% survival rate, and those receiving 4% had only 56.6% survival. This suggests that more supplement is not always better—there appears to be an optimal dose, similar to how taking too much of a vitamin can be less effective than taking the right amount.
When researchers examined tissue samples from infected fish under a microscope, they found that fish receiving the supplement showed less damage from the bacterial infection compared to control fish. The plant supplement appeared to help the fish’s tissues repair themselves and resist infection-related harm.
The plant supplement also improved growth performance in the fish, though the paper does not provide specific weight gain numbers. Fish receiving the supplement showed better overall development during the 56-day feeding period. Additionally, the supplement activated specific immune-related genes (IL-8, TNF-α, and IgM genes) that help coordinate the body’s defense response. However, antioxidant genes (SOD) showed mixed results—the 2% dose increased antioxidant gene activity, but all supplement doses reduced it compared to the control group, suggesting the supplement may work through different mechanisms than simple antioxidant activity.
This study aligns with previous research showing that plant-based supplements can enhance immune function in farmed fish. Similar studies with other plant extracts have shown comparable improvements in disease resistance and immune markers. However, this is one of the first detailed investigations of Biophytum sensitivum specifically in tilapia, making it a novel contribution. The finding that 1% is the optimal dose differs from some other supplement studies where higher doses were more effective, suggesting this particular plant has unique dose-response characteristics.
The study was conducted only in fish, so we cannot assume these results apply to humans or other animals. The research did not test long-term effects beyond 56 days of supplementation. The paper does not provide detailed information about the exact composition of the plant supplement or how it was prepared, which makes it harder for other researchers to replicate the work. Additionally, only one type of bacterial infection was tested, so we don’t know if the supplement would help against other diseases. The study also did not compare the supplement to standard pharmaceutical treatments, so we cannot say whether it would be better or worse than existing options for fish farming.
The Bottom Line
Based on this research, fish farmers might consider adding 1% Biophytum sensitivum supplement to fish feed as a way to improve immune health and disease resistance. The evidence is moderately strong for this specific application in tilapia farming. However, more research is needed before recommending this supplement for other fish species or for human consumption. Farmers should start with small-scale trials before switching entire operations to supplemented feed.
Fish farmers and aquaculture operations raising tilapia would benefit most from this research, as it directly applies to their operations. Researchers studying natural immune boosters and alternatives to antibiotics in farming should also pay attention. However, this research does not yet apply to human nutrition or health, so general consumers should not assume these benefits would transfer to them. Veterinarians working with fish farms might consider recommending this supplement as part of disease prevention strategies.
In the study, immune improvements appeared within the 56-day feeding period, and disease resistance benefits were evident during the 21-day infection challenge. Fish farmers could expect to see growth improvements within 4-8 weeks of adding the supplement to feed. Disease resistance benefits would likely become apparent during the first disease outbreak after supplementation begins, though prevention is always better than treatment.
Frequently Asked Questions
Does Biophytum sensitivum supplement actually help fish fight infections?
Yes, according to a 2026 study of 300 tilapia, fish fed 1% Biophytum sensitivum supplement showed 73% survival against bacterial infection versus 45% in unsupplemented fish. The supplement activated multiple immune system markers and reduced infection-related tissue damage.
What is the best amount of Biophytum sensitivum to add to fish feed?
Research shows 1% supplement by weight produced the best results, with 73.3% survival rates. Higher doses (2% and 4%) were less effective, suggesting there’s an optimal concentration. Fish farmers should start with 1% and monitor results.
Can humans take Biophytum sensitivum supplements based on this fish study?
This research was conducted only in fish and does not provide evidence for human use. While the results are promising for aquaculture, separate human studies would be needed before recommending this supplement for people. Do not assume fish benefits apply to humans.
How long does it take to see immune benefits from this plant supplement?
In the study, immune improvements appeared within the 56-day feeding period, and disease resistance benefits were evident during the 21-day infection challenge. Fish farmers could expect to see growth improvements within 4-8 weeks of supplementation.
Is Biophytum sensitivum better than antibiotics for treating fish infections?
This study shows the supplement improves disease resistance and survival, but it was not directly compared to antibiotics. The supplement appears to work as a preventive immune booster rather than a treatment for existing infections. More research is needed for direct comparisons.
Want to Apply This Research?
- For aquaculture operations, track weekly fish weight gain, feed conversion ratio (how much feed produces how much growth), and monthly disease incidence rates. Compare these metrics before and after introducing the supplement to quantify real-world benefits.
- Fish farmers could implement a gradual transition to supplemented feed: start by mixing 1% Biophytum sensitivum into existing feed for one tank, monitor results for 4 weeks, then expand to additional tanks if improvements are observed. This reduces risk while testing effectiveness in their specific conditions.
- Establish a baseline of current health metrics (survival rates during disease outbreaks, growth rates, feed costs per pound of fish produced). After introducing the supplement, track these same metrics monthly for at least 6 months to determine if benefits justify the supplement cost. Document any changes in fish behavior, appearance, or disease patterns.
This research was conducted in fish (Nile tilapia) and does not provide evidence for human health or nutrition. The findings apply specifically to farmed fish and cannot be assumed to transfer to other animals or people without separate research. Anyone considering using Biophytum sensitivum for human consumption should consult with a healthcare provider, as safety and efficacy in humans have not been established. Fish farmers should conduct small-scale trials before implementing large-scale changes to feeding programs. This summary is for informational purposes and should not replace professional veterinary or medical advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.