The immune system has many tasks
The immune system is a complex network of cells, tissues and organs that performs a variety of functions in the human body.
The most important tasks include:
- Defense against pathogens : The immune system can recognize and eliminate pathogens such as viruses, bacteria and parasites.
- Removal of degenerated cells: Mutated cells occur regularly in every person. The immune system (natural killer cells) recognizes such cells and removes them.
- Removal of harmful substances: Eliminated pathogens and other “waste products” can be disposed of via the lymphatic system with the help of immune cells.
- Control of inflammatory responses: In the event of infection or injury, an inflammatory response is necessary for the body to heal. The immune system controls the progression and resolution of inflammation.
- Memory function: After contact with pathogens, the immune system remembers the pathogen in order to respond more quickly and effectively to future infections.
The health of our immune system is influenced by many factors. Below, we present the most important influences and explain how to avoid potential adverse effects and strengthen your defenses in a targeted manner.
The role of nutrition for the immune system
Nutrition plays a central role in the health of the immune system. Foods rich in vital nutrients and low in toxins form the foundation of a strong immune system. Fruits, vegetables, herbs, and spices such as ginger and turmeric, in particular, offer a wealth of vitamins, minerals, trace elements, and antioxidant and anti-inflammatory plant compounds that promote immune function.
It's important to consume these foods raw or gently prepared to preserve their vital nutrients. High-quality proteins and fats in moderation also contribute to a well-functioning immune system.
The foods mentioned already contain many micronutrients that naturally strengthen the body. Supplementing a healthy diet with appropriate nutritional supplements, such as our Immun Power Up product, can further improve your immune system.
An unhealthy diet, on the other hand, can weaken the immune system, fuel inflammatory processes in the body, and even promote the development of allergies and autoimmune diseases. A key link in this is damage to intestinal health.
The intestine is the “home” of the immune system
Approximately 70 to 80% of immune cells are located in the intestinal wall. Gut health therefore plays a central role in the immune system. Disturbances in the intestinal flora and intestinal barrier are therefore also associated with a weakened immune system or dysregulation of the immune system (allergies, autoimmune diseases).
Foods that specifically strengthen the gut are therefore also good for our immune system. These include, for example, high-fiber foods such as fruits, vegetables, legumes, chia seeds, etc., or probiotic products such as kefir, kombucha, or sauerkraut.
Fiber provides food for beneficial intestinal bacteria and probiotic foods contain beneficial microorganisms that can strengthen the intestinal flora.
You can find out which foods damage the intestines and what else you should pay attention to when eating in our article “How a balanced intestinal flora promotes health” .
Strengthening the body's own protective barriers
In addition to strengthening intestinal health, it is also important to strengthen our body's other "barriers" to the outside world. These include the skin and the mucous membranes of the respiratory and urogenital tracts.
In our blog “Beauty from within: Nutrients for skin, hair & nails” we introduce you to important micronutrients that are important for healthy skin and mucous membranes.
Further tips for strengthening the skin and mucous membranes include:
- Use of a moisturizing nasal spray in dry air
- Use of indoor air purification devices
- Care for your skin with non-toxic lotions or creams
- Use of non-toxic sanitary products for women
Reduce stress for a strong immune system
Chronic stress negatively affects the immune system. Long-term stress leads to increased release of the hormone cortisol, which weakens the immune system. Cortisol inhibits the activity of immune cells, thereby increasing the risk of infections (1).
Methods such as meditation, yoga, and breathing exercises are suitable for reducing stress. But exercise, social interaction, and anything else that's fun and creates a sense of relaxation and balance are also helpful for stress relief.
In addition, it is of course also crucial to address the individual causes of chronic stress. Common causes include financial stress, relationship problems, or dissatisfaction at work.
Sleep: The regeneration engine for the immune system
Lack of sleep has been proven to weaken the immune system. During sleep, the body regenerates, and the immune system uses this time to repair cells and produce new immune cells. Deep sleep phases are particularly crucial for these processes.
Sleep deprivation leads to disruption of the immune system at various levels. Those who regularly lack enough sleep risk a chronic inflammatory state in the body (2) and also experience reduced activity of important defense cells such as natural killer cells (3). This increases the risk of various "diseases of civilization" and infections.
For healthy sleep, not only the length of sleep but also the quality of sleep is crucial. Tips such as avoiding blue light in the hours before bedtime, a dark, cool bedroom with good air circulation, exercise in the morning, and a relaxing evening routine can help improve sleep quality.
A regular day-night rhythm is also important for sleep quality. People who work shifts or night shifts often suffer from a disturbed circadian rhythm and less restful sleep.
Social bonds and mental health
Relationships with other people and a sense of community and belonging are important for our health. This not only improves mental well-being but also various physical functions, such as the immune system.
Studies have shown that people with a stable social network have a stronger immune response. In contrast, loneliness can lead to a weakened immune system, as the body is more exposed to chronic stress in isolation (4).
Sport – The right measure is crucial
Physical exercise has numerous positive effects on the immune system. Regular exercise promotes blood circulation and lymphatic drainage, thereby improving the transport of immune cells, antibodies, and immune messengers, as well as the removal of toxins from the body.
Increased sweating also eliminates toxins through the skin, and increased breathing during exercise supports the removal of mucus and pathogens from the respiratory tract. Other beneficial effects of physical exercise include the reduction of stress hormones that suppress the immune system and the temporary increase in body temperature, which supports the immune system in fighting off pathogens (5).
Exercise strengthens our immune system on many levels. However, excessive exercise without adequate rest should be avoided, as this weakens the body and thus the immune system, which in turn promotes the occurrence and reactivation of infections.
More tips for a healthy immune system
In addition to the tips mentioned above, there are many other things you can do and consider to strengthen your immune system.
Here is a small selection:
- Avoid alcohol and smoking: These habits burden the body with toxins and harm health in many ways.
- Adequate fluid intake: When we are well hydrated, blood circulation and lymphatic drainage are improved and all cellular processes function better.
- Fresh air: Regular ventilation improves air quality and has a positive effect on mucous membranes. Air filtration devices can also be beneficial.
- Natural sunlight: Natural sunlight is important for the production of vitamin D in the body and also contributes to a healthy day-night rhythm, thereby improving sleep quality.
- Chew thoroughly, do not overeat and do not drink while eating: these measures improve digestion and intestinal health, which can have a positive effect on the immune system.
- Regular sauna visits: The short-term increase in body temperature and increased sweating can have a positive effect on the immune system.
- Cold exposure: Cold showers and ice baths are simple and common ways to boost the immune system. Regular, short-term exposure to cold improves circulation, reduces inflammation, and strengthens the immune system.
Conclusion: Many small steps for a strong immune system
There are a variety of habits you can incorporate into your daily routine to improve your immune system. Of course, you don't have to and can't always implement all of these measures. What's crucial is that the foundation—diet, sleep, stress, and exercise—is largely "right" and that you gradually establish beneficial routines that you can follow most days.
Sources
- Zefferino R, Di Gioia S, Conese M. Molecular links between endocrine, nervous and immune systems during chronic stress. Brain Behavior 2021;11(2):e01960.
- Besedovsky L, Lange T, Haack M. The Sleep-Immune Crosstalk in Health and Disease. Physiol Rev. 2019;99(3):1325-1380.
- Irwin M, Mascovich A, Gillin JC, Willoughby R, Pike J, Smith TL. Partial sleep deprivation reduces natural killer cell activity in humans. Psychosom Med. 1994;56(6):493-498.
- Trachtenberg E. The beneficial effects of social support and prosocial behavior on immunity and health: A psychoneuroimmunology perspective. Brain Behavior Immune Health. 2024;37:100758. Published 2024 Mar 18.
- Exercise and immunity. University of Florida Health [Internet]. [Accessed: October 14, 2024].
