Our immune system works around the clock to protect us from all kinds of pathogens—from bacteria to viruses and fungi, there’s nothing it won’t tackle. Every day, we come into contact with millions of different germs, and our immune system produces at least as many immune cells to fight them—a fascinating feat!
Especially since the COVID-19 pandemic, the role of a healthy immune system has become much more important. Many people have become more aware than ever of how important a strong immune system is and how much it influences the course of an infection.
So what can we do to strengthen our immune system and protect our bodies from invaders? In this article, you’ll learn about the importance of your immune system and get plenty of tips on how to support it. We’ll also share some simple home remedies that can give your immune system an extra boost.
The Importance of the Immune System for Your Body
What exactly is the immune system? The immune system is a complex network of various organs, cells, and tissues in the body. For example, many mucous membranes, the bone marrow, the stomach, and, above all, the intestines are part of the immune system. White blood cells (leukocytes) are also part of it as defense cells.
This complex system is vital and plays a crucial role in maintaining our body’s health. Without a strong immune system, the body would be defenseless against harmful pathogens and environmental influences.
The main functions of the immune system include:
- Fight off pathogens such as viruses, fungi, and bacteria
- protect the body from environmental toxins
- detect and eliminate pathological changes within the body, such as cancer cells
Thus, the immune system not only helps prevent acute infections—chronic inflammation is also linked to a weak immune system. A healthy immune system is therefore the foundation of overall good health. That is why it is all the more important to protect and strengthen it.
Nutrition as the Foundation of a Healthy Immune System
Your diet is the key to a strong, healthy, and natural immune system. It directly affects your body’s ability to protect itself against infections and fight off pathogens. That’s why we strongly recommend that you follow these guidelines when planning your meals:
- Make sure to eat a colorful and varied diet: A balanced and varied diet strengthens your immune system. According to the German Nutrition Society (DGE), your daily diet should include 5 servings of fresh fruit and/or vegetables.
- Eat mostly natural, seasonal foods: In addition to fruits and vegetables, these include, above all, nuts, seeds, legumes, and whole grains.
- Avoid industrially processed foods and sweets: These usually contain a lot of sugar, processed salt, and saturated fats, which can put a strain not only on your metabolism but also on your immune system.
Boosting Your Immune System: What Nutrients Do I Need?
An adequate intake of essential micronutrients is important for all bodily functions—especially for your immune system.
The most important micronutrients for a healthy immune system include:
- Vitamins: especially vitamins C, D3, B12, and A. Learn more here about vitamins that are important for a strong immune system.
- Minerals: especially zinc, selenium, and iron
- Phytochemicals: They strengthen the immune system, have anti-inflammatory and antioxidant effects—in other words, they protect your cells from harmful free radicals.
However, it’s important to note that these days it’s nearly impossible to meet your daily nutritional needs through diet alone. This is because most fruits and vegetables no longer have the high nutrient content that was once common, due to selective breeding, harvesting while unripe, and long storage periods. To ensure you’re getting a comprehensive range of nutrients, you can also take high-quality dietary supplements.
A Healthy Gut – A Strong Immune System
It’s often said—and for good reason—that the gut is “the foundation of our health,” because the gut plays an enormous role in relation to our immune system. It is often even referred to as the center of the immune system. This is primarily because approximately 70 to 80 percent of the immune cells that are actively involved in fighting pathogens are located in the gut. The immune system associated with the gut also contributes to the production of antibodies.
In addition, the approximately 38 trillion beneficial gut bacteria—also known as the gut flora or microbiome —play a central role in a healthy immune response. This is because they support the body’s defense against pathogens through various mechanisms and help maintain the balance of the immune system. For example, they produce antimicrobial substances (bacteriocins) for direct defense or generate acidic metabolic byproducts, thereby fostering an acidic environment that is hostile to disease-causing pathogens. The cells of the intestinal mucosa also produce natural antimicrobial substances known as defensins.
Boost Your Immune System with Fresh Air
It has been clear, at least since the COVID-19 pandemic, that enclosed spaces increase the risk of infection because pathogens cannot disperse. In winter, the warm air from the heating system also dries out the mucous membranes in your throat, nose, and back of your throat, making it easier for pathogens to enter your body.
Even if there are days when you’d rather just hide away at home and the mere sight out the window takes away your desire to go out: It’s worth going outside regularly! That’s because long walks or bike rides in the great outdoors don’t just boost your immune system—your circulation and mental health will thank you, too.
Also, be sure to air out your entire apartment several times a day. To do this, open the windows all the way for at least 5 minutes to promote air circulation. This method of ventilation is much more effective than leaving the windows slightly open all the time.
Vitamin D3: Sunshine for Your Immune System
Vitamin D3 is directly linked to the immune system. It regulates the function of various immune cells and has antimicrobial and anti-inflammatory properties, which are crucial for a healthy immune response.
We obtain about 80 to 90% of our daily vitamin D3 requirement through our skin when exposed to sunlight, and only a fraction comes from our diet. In fact, there are very few foods that contain significant amounts of vitamin D3.
In addition to getting fresh air, this is another reason to spend time outdoors every day. However, especially during the winter months, it is often difficult to get enough sunlight. For this reason, many experts recommend taking additional vitamin D3 through high-quality dietary supplements, especially during the cold months. It is advisable to take vitamin D3 together with vitamins A and K2, as these vitamins work together in many processes and their effects complement and enhance one another.
Enough Sleep for a Strong Immune System
It’s no coincidence that strict bed rest is recommended when you have a cold. That’s because, along with a balanced diet, sleep is one of the most important regulators of a healthy immune response. This is primarily due to the fact that important immune processes—such as the production of immune cells and antibodies— are regulated while you sleep. In addition, sleep promotes the production of growth hormones, which are crucial for the repair and regeneration of various cells, including immune cells.
Numerous studies have already examined the effect of sleep on the activity of immune cells and have yielded impressive results. For example, scientists at the University of Tübingen discovered in an experiment that T-cell activity decreases after just 3 hours without sleep. This means that a lack of sleep has been shown to weaken the immune response and make us more susceptible to pathogens.
Strengthen the Body's Immune System Through Exercise and Sports
Regular exercise is a real boost for your whole body! When it comes to the immune system, exercise can have numerous positive effects. These include:
- Stimulation of Immune Cells: Exercise can help activate and increase the number of certain immune cells, including T cells and killer cells.
- Blood Circulation: Exercise promotes blood circulation, which allows immune cells to be transported throughout the body more quickly and efficiently.
- Lymphatic circulation: Exercise stimulates lymphatic circulation. This plays a role in the elimination of toxins and the distribution of immune cells throughout the body.
- Stress Relief: Exercise helps reduce stress and promotes the release of endorphins, which can enhance overall physical well-being.
- Reducing Inflammation: Moderate exercise can help increase the levels of anti-inflammatory molecules in the body.
In addition, exercise has long-term positive effects on the body: It can have a stabilizing effect by helping to boost metabolism and regulate blood pressure.
Avoid stress; relax your immune system
The impact of stress on the body is often underestimated. Yet stress is directly linked to many bodily functions and can severely impair the immune system. This is because stress activates the fight-or-flight response, causing the body to go into survival mode. Since survival is now the top priority, other important bodily processes are scaled back —including the immune system.
As part of this process, cortisol —the so-called "stress hormone"—is also released. Cortisol has an immunosuppressive effect, which means it actively suppresses the immune system.
If you want to combat stress in your daily life, make sure to take enough breaks. You can also incorporate regular relaxation exercises into your daily routine, such as yoga, breathing exercises, autogenic training, or progressive muscle relaxation.
Hydrate Your Body for a Strong Immune System
It’s hardly surprising that water is also extremely important for the immune system. In fact, the human body is made up of more than 50% water, which is therefore an essential component of nearly all bodily functions . It plays a crucial role in the immune system—for a variety of reasons:
- Transport of Substances: Water is the main component of blood, which is responsible for transporting oxygen, nutrients, and immune cells. A well-hydrated body therefore has an easier time efficiently transporting these substances throughout the body.
- Elimination of toxins: Substances that are harmful to the body are excreted through bodily fluids, such as urine or sweat. Thus, water helps the body rid itself of substances that can impair the immune system.
- Moisturizing the Mucous Membranes: Fluids help keep the mucous membranes—such as those in the mouth and nose—moist. Moist mucous membranes help inhibit the growth of pathogens and promote their removal.
To ensure your body stays properly hydrated, we recommend drinking about 1.5 to 2 liters of water or mild, unsweetened herbal teas per day.
More Tips for Naturally Boosting Your Immune System
To help you strengthen your immune system naturally, we've listed a few more tips for you here:
- Saunas and contrast showers: Alternating between hot and cold stimulates blood circulation and thus boosts your immune system. A visit to the sauna also helps you sweat out toxins and pathogens.
- Avoid nicotine and alcohol: They contain many toxins and harmful substances that can weaken your immune system.
- Laugh and sing: It puts you in a good mood and helps reduce cortisol, the stress hormone that suppresses the immune system.
- Eat spicy food: Spicy food can have antibacterial and anti-inflammatory effects, helping to boost your immune system.
- Keep your body warm: A normal body temperature is crucial for the optimal functioning of many immune processes.
What home remedies boost the immune system?
Now you already know what to look out for to boost your immune system. Here are some tried-and-true home remedies you can use to give your immune system an extra boost:
- Ginger has anti-inflammatory and antimicrobial properties that can fight pathogens and thus support your immune system.
- Lemon juice is a real vitamin C booster. Vitamin C plays a key role in maintaining a healthy immune system. Even Grandma knew the benefits of a hot lemon.
- Turmeric stimulates immune cells and can therefore strengthen your immune system.
- Garlic and onions contain specific compounds (such as allicin) that support the immune system.
- Beets are among the most nutrient-dense vegetables. They are rich in vitamins, minerals, zinc, and iron.
- Probiotic foods support your gut health and can therefore boost your immune system. Pro EM san offers you a balanced combination of 31 essential probiotic bacterial strains and 24 fermented herbal and plant extracts.
Conclusion
Maybe you've been there: You don't realize how precious your health is until you're lying in bed with a stuffy nose and a sore throat. That's when you long to breathe easily again and be able to go about your day as you please.
That’s why now is the time to appreciate and protect your immune system—it does an outstanding job every day! With small, everyday habits and simple home remedies, you can already make a big difference and actively support your health. It’s up to you to strengthen your immune system and thus enjoy a more active, vibrant lifestyle. After all: “Health isn’t everything, but without health, everything is nothing.”
Sources
- Federal Center for Nutrition: Strengthening the Immune System, accessed on Jan. 12, 2023
- Tübingen University Hospital: How Sleep Strengthens the Immune System, accessed on January 12, 2024
- Gesund.bund: How to Boost Your Immune System, accessed on Jan. 13, 2024
- DocCheck Flexikon: Immune System, accessed on Jan. 13, 2024
