If you’re feeling tired and run-down, and maybe have a scratchy throat or a runny nose, then they’re back: those typical infections. It’s no wonder, since your immune system is under extra strain right now. Less daylight and exercise, coupled with more exposure to cold and dry, heated air —all of this weakens your body’s natural defenses and makes it easy for pathogens to take hold.
That’s exactly why it’s important right now to support your immune system holistically: with enough sleep, a nutrient-rich diet, soothing routines, and targeted micronutrient supplementation. Because when your immune system is strong, so is your body. You’ll get through cold season feeling stable, resilient, and with more energy.
In this article, you'll learn what your immune system needs most during the cold season, which nutrients and habits strengthen it, and how you can effectively support it with selected dietary supplements.
What is the immune system, and why does it weaken during the cold season?
The immune system is our body’s natural defense system: It protects us around the clock from viruses, bacteria, and other pathogens—through the precise interaction of immune cells, antibodies, and signaling molecules.
Generally speaking, the immune system is divided into two main components:
- The innate immune system is active from birth. It responds quickly and broadly to all foreign pathogens—for example, through phagocytes, which immediately neutralize potential invaders.
- The acquired (adaptive) immune system develops over the course of a person’s life. It produces specific antibodies against known pathogens and stores this information in what is known as immunological memory. This enables the body to respond more quickly and effectively in the event of a subsequent infection.
Starting as early as late fall, this finely tuned system comes under pressure: cold weather, dry air from heating systems, lack of light, insufficient physical activity, and a nutrient-poor diet can all impair its function. Even minor stresses can disrupt this balance and allow pathogens to gain a foothold . This makes it all the more important to specifically support your immune system right now.
How can I boost my immune system in the winter?
With a few simple but effective routines, you can specifically support your immune system during the cold season:
- Get enough sleep: During the night, not only do your body and mind regenerate—your immune system also uses this rest period to renew immune cells and regulate important processes. So be sure to get 7 to 8 hours of restful sleep each night.
- Regular exercise—even in cold weather: Whether it’s walking, biking, or yoga—just 20 minutes of gentle exercise a day stimulates blood circulation, activates the lymphatic system, and strengthens the immune system.
- Reducing Stress in Everyday Life: When you experience chronic stress, your body releases higher levels of cortisol—a stress hormone that inhibits important immune responses. That’s why taking short breaks to catch your breath, meditating, or intentionally setting aside time for yourself not only calms your mind but also boosts your immune system.
- Contrast showers and saunas: The hot-and-cold stimulation trains the blood vessels and promotes blood circulation. Therefore, regular sauna sessions and contrast showers can strengthen your immune system and make you more resistant to infections.
Better Winter Health Through Proper Nutrition
A balanced diet is especially important in the winter. That’s because the right foods provide your immune system with all the micronutrients it needs to function optimally. These include, above all:
- Vitamin C is considered a “classic immune booster.” It supports immune cells and protects against oxidative stress. You’ll find it mainly in citrus fruits, sea buckthorn, rose hips, bell peppers, and broccoli.
- Vitamin D3 also plays a key role in immune regulation. Since sunlight is scarce, especially in winter, targeted supplementation is particularly beneficial. Smaller amounts are found in fatty fish and mushrooms.
- Zinc plays a role in cell regeneration and wound healing. Good sources include meat, nuts, legumes, oatmeal, and whole-grain products.
- Antioxidants protect cells from free radicals—and are found in abundance in colorful fruits and vegetables, such as berries, pomegranates, kale, spinach, and carrots.
Note: About 70% of immune cells are located in the gut. Fiber-rich and fermented foods promote healthy gut flora and thus strengthen your immune system from the inside.
Natural Immune Boosters from TISSO to Support Your Health
When it gets cold outside and the wave of infections rolls in, your immune system can benefit from targeted support. High-quality micronutrients can help strengthen your immune system on several levels—especially when your diet and exposure to sunlight aren’t sufficient during the winter. We offer natural products that address exactly this need:
- Pro Vitamin D3 Öl 1.000 provides you with highly bioavailable vitamin D3 oil, combined with its cofactors, vitamin K2 and vitamin A—especially valuable during the dark winter months.
- The Immune Booster Package —featuring Pro Vitamin C Ultra, Pro Lactoferrin Immun, and Pro Mineral Complete —offers you a targeted combination of essential nutrients to support your immune system.
- Each serving of Phytobiose contains 14 immune-boosting plant extracts and natural substances—including nasturtium, horseradish root, thyme, and cranberry—plus vitamin C, vitamin B12, and zinc.
- Probiotics Gut Health Original supports you with 31 probiotic bacterial cultures to help rebuild your gut flora (Pro EM san), 4 types of soluble dietary fiber to serve as “food” for the gut bacteria (Pro Präbioma), and valuable nutrients for the mucous membranes (Pro Mucosa).
Conclusion: Stay Healthy Through the Winter with a Strong Immune System
Winter really puts your immune system to the test—the cold, dry air from heating systems, and lack of sunlight are just a few of the challenges. That makes it all the more important to give your body everything it needs to help you get through the cold season as well as possible.
Even small changes can make a big difference: Getting enough sleep, exercising outdoors, taking intentional breaks, and following rituals like alternating hot and cold showers or sauna sessions can noticeably strengthen your immune system. A balanced diet is just as important. Nutrients such as vitamin C, vitamin D3, zinc, and antioxidant plant compounds ensure that your immune system can function optimally. And don’t forget: Your gut also plays a crucial role in immune function, since about 70% of the body’s immune cells are located there.
Targeted support—such as the Immune Booster Package, Pro Vitamin D3 Öl 1.000, or the Probiotics Gut Cure Original—provides your immune system with the building blocks it needs to function day to day — so you can stay fit and healthy, even when it’s stormy and snowing outside.
