Deoxynivalenol, a toxin found in approximately 60% of foods worldwide, damages the male reproductive system in both young and adult mice, according to a 2026 study of 60 mice published in Mycotoxin Research. The toxin reduced sperm production and increased abnormal sperm in adult mice while weakening antioxidant defenses in both age groups. Gram Research analysis shows this highlights potential risks to human fertility from a widespread food contaminant
A new study shows that deoxynivalenol, a toxic substance found in about 60% of foods worldwide, can harm the reproductive system in both young and adult male mice. Researchers exposed mice to this toxin and found it damaged testicular structure, reduced sperm production in adults, and weakened the body’s natural defense systems against damage. The toxin affected young mice differently than adults, suggesting that the timing of exposure matters. These findings help scientists understand how this widespread food contaminant might affect human reproduction and fertility.
Key Statistics
A 2026 study of 60 mice found that deoxynivalenol, a mycotoxin present in approximately 60% of foods worldwide, reduced daily sperm production and increased sperm abnormalities in adult mice exposed to contaminated feed
Research published in Mycotoxin Research in 2026 showed that deoxynivalenol impaired antioxidant defenses in both prepubertal and adult mice, as evidenced by reduced FRAP values and ABTS radical scavenging activity
A 2026 mouse study revealed that deoxynivalenol exposure altered the seminiferous epithelial cycle, reducing the proportion of testicular tubules in advanced developmental stages in both young and adult animals
According to a 2026 research article, deoxynivalenol increased macrophage numbers and IL-1 beta levels in both age groups, with adult mice additionally showing elevated TNF-alpha concentrations
The Quick Take
- What they studied: How a common food toxin called deoxynivalenol affects the male reproductive system in young versus adult mice
- Who participated: Sixty laboratory mice divided into two age groups: prepubertal (young) mice and adult mice. Half received normal food, and half received food contaminated with deoxynivalenol at levels found in real-world food supplies
- Key finding: Deoxynivalenol damaged the structure of the testes in both young and adult mice. In adult mice, the toxin reduced daily sperm production and increased abnormal sperm. Young mice showed increased production of harmful molecules called superoxide, while both groups had weakened antioxidant defenses
- What it means for you: This research suggests that deoxynivalenol, a toxin present in many foods, may pose risks to male fertility. While this study was conducted in mice, it highlights the importance of understanding how food contaminants affect reproduction. More research is needed to determine if similar effects occur in humans
The Research Details
Researchers divided 60 mice into groups based on age and exposure duration. Young mice (prepubertal) were exposed to deoxynivalenol for 15 days, while adult mice received the same toxin for 28 days. The contaminated food contained 10 milligrams of deoxynivalenol per kilogram of feed, a level comparable to what humans might encounter in real food supplies. The control group received normal, uncontaminated food.
After the exposure period, scientists examined the mice’s testes using multiple methods. They looked at tissue structure under a microscope, measured specific markers of cell damage and inflammation, tested the body’s ability to fight oxidative stress (damage from harmful molecules), and analyzed sperm quality and production rates. This comprehensive approach allowed researchers to understand how the toxin affected different aspects of male reproductive health.
The study design was important because it compared two different developmental stages. Puberty is a critical time when the reproductive system is developing and may be more vulnerable to toxins. By testing both young and adult mice, researchers could determine whether age affects how the toxin damages the reproductive system.
This research approach matters because deoxynivalenol is a real-world problem affecting food supplies globally. Understanding how this toxin affects reproduction at different life stages helps scientists predict which populations might be most at risk. The study’s focus on both structural damage and functional changes (like sperm production) provides a complete picture of how the toxin harms the reproductive system
The study used multiple measurement techniques to assess toxin effects, which strengthens the reliability of findings. Researchers examined tissue structure, measured specific damage markers, and tested sperm quality, providing multiple lines of evidence. The study included both young and adult animals, allowing for age-related comparisons. However, this research was conducted in mice, so results may not directly apply to humans. The study did not specify whether findings were statistically significant, which is important context for interpreting the results
What the Results Show
Deoxynivalenol caused clear damage to testicular structure in both young and adult mice. The toxin altered the normal development cycle of sperm-producing cells, reducing the proportion of tubules in advanced stages of development. In adult mice specifically, the toxin reduced the number of sperm produced daily and increased the percentage of abnormal sperm, suggesting direct harm to fertility.
The toxin also weakened the body’s natural defense systems in both age groups. Researchers measured antioxidant defenses, which are the body’s ability to neutralize harmful molecules. Both young and adult mice exposed to deoxynivalenol showed reduced antioxidant activity. Young mice additionally showed increased production of superoxide, a particularly damaging type of harmful molecule.
Inflammatory responses differed between age groups. Both groups showed increased numbers of immune cells called macrophages and elevated levels of IL-1 beta, a signaling molecule that promotes inflammation. However, adult mice also showed elevated TNF-alpha, another inflammatory marker. These findings suggest that the toxin triggers an inflammatory response that may contribute to reproductive damage.
Interestingly, the toxin did not increase markers of programmed cell death (caspase-3 expression) in either group, suggesting that the damage mechanism may not involve cells dying through this particular pathway. This finding helps narrow down how the toxin causes harm. The differences between young and adult mice in superoxide production and inflammatory markers suggest that age influences how the body responds to this toxin
According to Gram Research analysis, this study extends previous knowledge by directly comparing toxin effects across different developmental stages. Earlier research established that deoxynivalenol can harm reproduction, but this work clarifies that both young and adult animals are vulnerable, though in somewhat different ways. The finding that adult mice show reduced sperm production aligns with concerns about this toxin’s impact on fertility
This study was conducted in mice, so results may not directly translate to humans. The study examined relatively short exposure periods (15 to 28 days), whereas humans might experience chronic, long-term exposure to this toxin through food. The research did not specify sample sizes for each group or provide statistical significance values, making it difficult to assess the strength of individual findings. The study also did not examine whether the effects were reversible or permanent
The Bottom Line
Based on this research, reducing exposure to deoxynivalenol through careful food selection and storage is prudent, particularly for individuals concerned about fertility. While this study was conducted in mice, the widespread presence of this toxin in food supplies warrants attention. Confidence level: Moderate. This is animal research, and human studies are needed to confirm similar effects
Men concerned about fertility or reproductive health should be aware of this research. Individuals planning to have children may want to consider food safety practices that reduce mycotoxin exposure. Parents of young children should note that this toxin may affect developing reproductive systems. This research is less immediately relevant to those not concerned with fertility, though the general food safety implications apply to everyone
In the mouse study, reproductive damage was observed after 15 to 28 days of exposure. In humans, the timeline for effects is unknown. Chronic exposure over months or years might be necessary to cause noticeable changes, or effects might accumulate gradually. More research is needed to establish realistic timelines for human exposure
Frequently Asked Questions
What is deoxynivalenol and where is it found in food?
Deoxynivalenol is a toxic substance produced by mold that contaminates approximately 60% of foods worldwide, particularly grains, nuts, and dried fruits. It forms naturally when crops are exposed to certain mold species during growth or storage
Can deoxynivalenol affect human fertility like it did in the mice?
This mouse study suggests deoxynivalenol may harm human reproduction, but human research is needed to confirm. The toxin’s effects on humans remain unclear, though its widespread presence in food warrants caution, particularly for those concerned about fertility
How can I reduce my exposure to deoxynivalenol?
Store grains and nuts in cool, dry conditions, purchase smaller quantities more frequently, choose certified low-mycotoxin products when available, and inspect food for visible mold. Proper food handling and storage significantly reduce mycotoxin levels
Why does age matter when it comes to toxin exposure?
This study found that young and adult mice responded differently to deoxynivalenol, with young mice showing increased harmful molecule production and adults showing reduced sperm production. Puberty appears to be a critical window when the reproductive system may be more vulnerable to toxins
Is this toxin dangerous at the levels found in food?
The mouse study used food contamination levels comparable to real-world exposure. While this research suggests potential risks, human studies are needed to determine safe exposure limits and actual health impacts at typical dietary levels
Want to Apply This Research?
- Track weekly consumption of high-risk foods known to contain mycotoxins, such as grains, nuts, and dried fruits. Log the types and quantities consumed, then correlate with any changes in energy levels or health markers over time
- Implement a food storage improvement plan: store grains and nuts in cool, dry conditions, purchase smaller quantities more frequently to reduce storage time, and choose certified low-mycotoxin products when available. Log these changes in the app to monitor adherence
- Set monthly reminders to review food storage practices and mycotoxin exposure sources. Track any health changes or concerns related to reproductive health or general wellness. Use the app to identify patterns between dietary choices and health outcomes over a 3 to 6 month period
This research was conducted in mice and has not been confirmed in humans. Deoxynivalenol’s effects on human reproduction remain unclear. This article is for informational purposes only and should not replace professional medical advice. Individuals with concerns about fertility or reproductive health should consult a healthcare provider. Food safety practices should follow guidance from regulatory agencies like the FDA. This study does not establish safe or unsafe exposure levels for humans
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.