5 Facts About Your Immune System That May Surprise You

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Immune System

Fact: You know your immune system does an important job.

But do you know some of the reasons why it’s so incredible?

Your immune system is about so much more than fighting off infections (although that is, of course, a huge part of it!). It’s an intricate, deeply interconnected system that influences nearly every function in your body and massively impacts your overall wellness.

From the surprising role of gut health to the hidden impact of chronic stress—and why sleep matters more than you might think—here are five fascinating facts that will help you better understand and support your body’s natural defenses.

Brain Cell

Surprising Fact 1: Your Immune System Has a Memory to Rival an Elephant’s

Have you ever wondered why we’re able to fight off colds and infections we’ve encountered before?

That’s because, thanks to specialized memory B and T cells, your immune system can actually “remember” pathogens it has previously encountered. This incredible biological memory allows your body to mount a faster, more effective immune response when exposed to the same troublemaker in the future, neutralizing the threat before it becomes a real problem.

Your immune system’s “memory,” so to speak, is massively important because it builds resilience against what would otherwise be recurring illnesses over time. Its adaptability is one of the most powerful tools your body has in its arsenal against disease—and easily one of the most fascinating aspects of immune health.

Gut Health

Surprising Fact 2: The Majority of Your Immune System (70%!) is in Your Gut

Gut health is essential for a healthy immune system—but why?

Well, your gut is home to an enormous network of immune cells that work with your body’s unique microbiome to regulate inflammation and fight off dangerous pathogens. (This is why a balanced and diverse microbiome is key for a thriving immune response!)

Even if this fact is a new addition to your wealth of health knowledge, you can already see why it’s no surprise that studies continue to show that maintaining a healthy gut microbiome can reduce inflammation, improve immune responses, and even lower the risk of autoimmune diseases.

Mindfulness

Surprising Fact 3: Stress Weakens Your Immune System

Do you know how stress affects your immune function?

Hint: it’s not great.

When under chronic stress, your body’s inflammatory responses are, to be totally colloquial, thrown out of whack—making you more susceptible to common colds, infections, and even long-term health conditions like cardiovascular disease.

One major reason for this is cortisol, the hormone that suppresses immune activity.

Under prolonged stress, cortisol production increases, directly weakening your body’s ability to fight infections. Over time, this can not only lead to a higher risk of illness, but also a slower recovery when you do get sick.

Thankfully, mindfulness practices, exercise, and adequate rest are all phenomenal ways to manage stress and, in turn, support a healthy immune system.

Woman Sleeping

Surprising Fact 4: Proper Sleep is Essential for Proper Immune Function

Who doesn’t love a good night’s sleep? Well, you may appreciate it even more after reading this.

Getting enough sleep isn’t just about rest and recovery—it’s also connected to your immune function. Specifically, deep, restorative sleep is vital for the production of cytokines—proteins that help fight infections and regulate inflammation.

On the flip side, the lack of sleep can make it harder for your body to fight off bacteria and viruses because it can impair the effectiveness of T-cells. In fact, studies show that people who consistently get fewer than six hours of sleep per night are significantly more susceptible to colds and infections than those who sleep seven or more hours.

Prioritize getting your quality Zzzzs. Your body will thank you.

Colorful fruits and vegetables

Surprising Fact 5: Your Diet Impacts Your Health—Including Immune Health

Okay, maybe this one isn’t a huge surprise.

But it could be surprisingly more important than you might think at first.

Because what you eat on a regular basis doesn’t just impact your digestion or weight, it helps lay the foundation for your overall health—including your immune health.

Nutrients like zinc, selenium, and omega-3 fatty acids play a crucial role in strengthening your immune system. Vitamins C and D are also super important—Vitamin C helps boost white blood cell production to fight infections, while Vitamin D regulates your body’s immune response and reduces inflammation.

Eat to keep your immune system in peak fighting condition. Enjoy a variety of colorful fruits and vegetables so you get a broad range of essential vitamins and antioxidants—and make sure you opt for whole, nutrient-dense foods over processed options.

ION* +Vital Immunity

A Final Surprising Fact? Taking Care of Your Immune Health is Easier Than You Think!

Truly, the immune system is fascinating—its incredible adaptive memory, deep connection to the gut, sensitivity to stress and sleep, and reliance on proper nutrition all play a role in your overall wellness.

With so many interconnected factors influencing it, keeping your immune system strong might seem complicated.

But the good news is, it doesn’t have to be! A few simple habits can go a long way in supporting your body's natural defenses.

  • Maintain your gut health
  • Find ways to manage stress
  • Get enough sleep!
  • Focus on nutrient-rich foods and limit processed ones

And if you want to take your immune support to the next level? Try incorporating +Vital Immunity into your daily wellness routine for an extra boost!

All natural +Vital Immunity is crafted with powerful adaptogens and whole botanicals—including KSM-66® Ashwagandha, Elderberry, and Astragalus—all carefully selected to enhance key components of your immune system.

What’s more, it’s incredibly easy to fit into even the busiest schedules. Simply add it to filtered water for an immune boost on the go. The convenient, travel-friendly packaging makes it super easy to support your natural defenses wherever you may be. (Plus, it’s designed to work synergistically with ION* Gut Support!)

In short? Take care of your immune system, and it will take care of you.

Try +Vital Immunity today.

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