Building resilient teams: The role of immune health in employee productivity

Americans catch an average of two to three colds each year—and when kids bring illnesses home, it often sidelines entire households. In turn, this leads to missed workdays, reduced focus, and even a significant hit to overall productivity.

Employee absenteeism costs U.S. employers $225.8 billion annually or $1,685 per employee. Beyond absenteeism, presenteeism—when employees work while sick—can further significantly reduce productivity and potentially spread illness to colleagues. 

While traditional workplace wellness programs often focus on managing symptoms after someone gets sick, a functional medicine approach takes it a step further—by helping employees stay healthier in the first place. By identifying key biomarkers and implementing targeted interventions, employers can build more resilient teams with reduced illness-related downtime and enhanced overall productivity. Keep reading to learn more about why this is important and how you can support your team and their immune function.

‍

Why does immune health matter for employee productivity?

The link between immune function and workplace performance goes far beyond the occasional sick day. A strong immune system supports sharper thinking, sustained energy, and emotional resilience—all essential for high-level job performance. 

Impacts cognitive performance

When the immune system is activated to fight even mild infections, inflammatory cytokines can cross the blood-brain barrier and temporarily impair executive function, memory, and decision-making. In turn, this can further impact problem-solving abilities and other cognitive functions.

Reduces energy

The immune system requires significant energy resources. When fighting inflammation or infection, the body diverts energy away from other systems, resulting in fatigue and reduced stamina.

Decreases emotional regulation

The immune-brain connection significantly influences mood stability and stress responses. Inflammatory markers correlate with increased anxiety, irritability, and reduced stress tolerance—factors that directly impact team dynamics and client interactions.

May impact long-term performance

Chronic immune dysregulation contributes to accelerated aging and cognitive decline. Organizations investing in employee immune health protect not just current productivity but their long-term human capital investment.

‍

Implementing a comprehensive immune support program

By viewing immune health as a performance optimization strategy rather than simply illness prevention, employers can leverage functional medicine approaches to build more resilient, high-performing teams. Here’s how you can do that:

1. Offer baseline assessments and personalized interventions

Advanced biometric testing establishes each employee’s immune status baseline and identifies specific areas for improvement. This data-driven approach enables targeted interventions rather than one-size-fits-all wellness programs.

For example, an employee showing low vitamin D but optimal zinc levels would receive a different protocol than someone with the opposite pattern. This personalization increases both effectiveness and employee engagement.

2. Optimize nutrition and diet for immune strength

What we eat plays a major role in how well the immune system functions. Here’s how organizations can support immune health through nutrition:

• Micronutrient Support: Nutrients like vitamin C, vitamin D, zinc, and selenium are essential for immune defense. Workplace wellness programs can help by promoting immune-boosting foods in cafeterias and offering education on smart dietary choices or supplements.
• Anti-Inflammatory Foods: Ongoing inflammation weakens the immune system. Employers can stock break rooms and meals with anti-inflammatory options like berries, leafy greens, fatty fish, nuts, seeds, and fiber-rich veggies to help reduce inflammation naturally. These can also be great replacements for traditional processed food vending machines.
• Gut Health Matters: About 70-80% of the immune system resides in the gut. Offering fermented foods, prebiotic fibers, and a variety of plant-based options can help support gut health, which in turn boosts immune strength and resilience.

Additionally, education around portion sizing and mindful eating can help thwart chronic issues, like obesity, which also lead to increases in inflammation—eventually impacting immunity.

3. Teach healthy stress management techniques

Chronic stress significantly impairs immune function by elevating cortisol and depleting protective immune cells. Workplace stress management initiatives deliver measurable immune benefits through multiple approaches. 

For instance, structured mindfulness programs, even brief practices (5-10 minutes) implemented during work hours, can reduce stress hormones and improve immune markers. Companies can integrate guided sessions into the workday schedule or provide access to mindfulness applications. 

Additionally, strategic workload balancing prevents the chronic stress that suppresses immune function, with employers implementing team-based approaches that distribute intense work periods and recovery time. Environmental modifications also play an important role, as workplace design elements like natural light exposure, air filtration, and quiet spaces support the body’s natural circadian rhythms and reduce immune-depleting stress. By addressing stress through this comprehensive approach, organizations protect both immediate immune resilience and long-term health outcomes.

4. Promote healthy sleep habits to support immune resilience

Workplace initiatives can support better sleep through multiple complementary approaches. After all, we all know how tough it can be to sustain productivity after a sleepless night.

Once again, this strategy starts with education, such as providing evidence-based information about sleep’s immune impacts and practical improvement strategies that employees can implement immediately. Work schedule flexibility represents another powerful tool, as allowing schedule adjustments that align with employees’ natural chronotypes can significantly improve sleep quality and duration. 

Digital boundaries complete this comprehensive approach, with clear expectations around after-hours communications helping protect employees’ sleep time. Together, these sleep-supporting strategies create an organizational culture that recognizes rest as essential for optimal immune function and workplace performance.

5. Implement strategic movement breaks & education

Regular moderate exercise increases immune surveillance without triggering inflammatory responses. Workplace programs might include guided movement breaks, walking meetings, or onsite fitness facilities.

However, intense exercise without adequate recovery can actually suppress immunity. Thus, providing your employees with information about balancing training stress (such as high-intensity training) with recovery is also important here.

‍

Measuring success: The ROI of immune health programs

Investing in employee immune health delivers measurable returns across multiple business dimensions, including reduced absenteeism, decreased healthcare utilization, and improved self-reported productivity and engagement metrics.

By taking a proactive, functional medicine approach to immune health, employers do not just reduce illness-related costs; they create a foundation for sustainable high performance that benefits both individual employees and the organization as a whole. In today’s competitive business environment, supporting immune function represents one of the most strategic investments companies can make in their most valuable asset: their people.

‍

Sources

1. About Common Cold. (2024, October 15). Common Cold. https://www.cdc.gov/common-cold/about/index.html#:~:text=Colds%20usually%20last%20less%20than%20a%20week%20and%20are%20caused,and%20children%20often%20have%20more 

2. Worker illness and injury costs U.S. employers $225.8 billion annually. (2015, January 28). CDC Foundation. https://www.cdcfoundation.org/pr/2015/worker-illness-and-injury-costs-us-employers-225-billion-annually#:~:text=Worker%20Illness%20and%20Injury%20Costs%20U.S.%20Employers%20%24225.8%20Billion%20Annually,-January%2028%2C%202015&text=The%20Centers%20for%20Disease%20Control,States%2C%20or%20%241%2C685%20per%20employee 

3. Dantzer, R., O’Connor, J. C., Freund, G. G., Johnson, R. W., & Kelley, K. W. (2007). From inflammation to sickness and depression: when the immune system subjugates the brain. Nature Reviews. Neuroscience, 9(1), 46–56. https://doi.org/10.1038/nrn2297 

4. Wiertsema, S. P., Van Bergenhenegouwen, J., Garssen, J., & Knippels, L. M. J. (2021). The Interplay between the Gut Microbiome and the Immune System in the Context of Infectious Diseases throughout Life and the Role of Nutrition in Optimizing Treatment Strategies. Nutrients, 13(3), 886. https://doi.org/10.3390/nu13030886 

5. Nieman, D. C. (2011). Moderate exercise improves immunity and decreases illness rates. American Journal of Lifestyle Medicine, 5(4), 338–345. https://doi.org/10.1177/1559827610392876 

‍