Understanding the Power of the Vagus Nerve

Understanding the Power of the Vagus Nerve

Let’s get to know a part of your body that often goes unnoticed, but is incredibly important – the vagus nerve. The vagus nerve works silently behind the scenes, controlling functions like your heart rate, breathing, digestion, and even your mood!

But what happens when it stops working as it should? Unfortunately, a range of symptoms that can be tricky to diagnose. In this article, we’ll explore why this little nerve is so critical to our everyday health – and how to stimulate yours for better health.

Understanding the role of the vagus nerve

The vagus nerve is the longest cranial nerve in the body. It starts from the brainstem and winds its way through the neck and chest, connecting to major organs like the heart, lungs, liver, and digestive system along the way.

Believe it or not, there are twelve cranial nerves in our bodies. These nerves come in pairs and play an essential role in connecting the brain to other parts of the body. Some of them send sensory information to the brain, including details about smells, sights, tastes, and sounds. Other cranial nerves control our body movements and the function of certain glands. And some do both! One such nerve is the vagus nerve. It’s responsible for a wide range of functions, including regulating the heart rate, breathing, and digestion process.

How the vagus nerve affects your health

Regulate Heart Rate and Blood Pressure

The vagus nerve is responsible for a process known as the "baroreceptor reflex”. It's like a built-in system that ensures your blood pressure stays within a healthy range.

Here's how it works: the baroreceptors (fancy word for pressure sensors) in your blood vessels, detect changes in blood pressure. Then, they send a signal to your brain through the vagus nerve. Your brain takes this signal and sends a message back down the nerve to the heart, telling it to either slow down or speed up, in order to maintain a healthy blood pressure.

Now, when you're just relaxing and taking it easy, your vagus nerve is working in the background, slowing down the heart rate. It knows that your body doesn't need as much oxygen or nutrients when you're at rest. But, as soon as you start moving or exercising, the vagus nerve springs into action, telling your heart to pick up the pace and increase blood pressure to supply those hard-working muscles with the nutrients they need. 

Improve Digestion

Have you ever thought about what happens inside your body when you take a bite of food? As soon as you start chewing, the vagus nerve wakes up and sends a message to the brain that food is on the way. Your brain then sends a signal to the digestive system to get ready for the incoming meal. And once the food finally reaches the stomach, the vagus nerve continues to play its role by stimulating the production of stomach acid and digestive enzymes, which break the food down into smaller particles that our body can absorb and use for energy.

The vagus nerve also contracts the muscles in the stomach and intestines to push the food along, ensuring that everything keeps moving in the right direction. However, if the vagus nerve is out of sync with the brain and body, it can cause unpleasant problems such as bloating, constipation, and acid reflux.

Keep Inflammation in Check

Inflammation is a natural response the body has to injury or infection. It's a good thing because it's a sign that your immune system is doing its job. But here's the thing: chronic inflammation can happen when your body's immune system is constantly activated, even when there's no injury or infection to fight off. And this can lead to a range of issues, from arthritis to heart disease. 

What causes all this trouble? One major culprit, cytokines. These little proteins can wreak havoc when they get out of hand. The vagus nerve helps out by stimulating the production of anti-inflammatory molecules like norepinephrine. These molecules help reduce the production of troublesome cytokines.

The vagus nerve also activates the "cholinergic anti-inflammatory pathway." This pathway is like a feedback loop between the nerve and the immune system. The vagus nerve sends signals that help calm down the inflammatory response, while the immune system sends signals back to the nerve to let it know when the inflammation has been controlled.

Mood Regulation

The vagus nerve is connected to the parasympathetic nervous system, which is responsible for the "rest and digest" response. When this nerve gets activated, it sends signals to your brain that help you relax and feel at ease. It's like pressing the "off" button on your stress levels.

This happens in part because the vagus nerve stimulates the release of a neurotransmitter called acetylcholine. Acetylcholine acts as a natural mood stabilizer, helping to regulate the activity of other neurotransmitters like dopamine and serotonin. So when acetylcholine levels are low, you may be more prone to depression, anxiety, and other mood disorders. By activating your vagus nerve, you can help to boost your acetylcholine levels, leading to improved mood and reduced anxiety.

Immune Function

Your immune system works 24/7 to protect your body against harmful pathogens. However, when things go wrong, it can cause chronic inflammation and autoimmune diseases. That’s where the vagus nerve comes in. It acts as a mediator between the immune system and the brain, making sure that the immune response doesn't get too carried away and cause more harm than good.  When the vagus nerve is doing its job, it helps balance out the pro-inflammatory and anti-inflammatory responses of your immune system. 

The vagus nerve also regulates the production of important immune cells like T-cells and B-cells and influences the activity of macrophages. You can think of macrophages as the body's clean-up crew, swooping in to get rid of foreign substances. Without them, our bodies would be overrun with harmful bacteria, leaving us feeling sick and fatigued.

By understanding the importance of this nerve and taking steps to stimulate it, you can keep all systems working together in harmony.

Symptoms of a weak vagus nerve

Whether you're busy at work or catching up on sleep, the vagus nerve is always clocked in, keeping your body functions in check. But what happens when things start to go wrong? Everything from anxiety to digestive issues and heart problems can be traced back to the vagus nerve. How can you tell if yours is struggling to keep up? 

Here are some potential warning signs to look out for:

  • Dizziness and fainting
  • Digestive issues
  • Nausea
  • Ringing ears
  • Heart palpitations
  • Anxiety and depression
  • Chronic inflammation

Which factors may cause vagus nerve damage?

Chronic stress: Stress is a common culprit. When you're stressed, your body releases a hormone called cortisol, which can interfere with the vagus nerve's ability to function properly. This can lead to heart palpitations, digestive issues, and difficulty breathing.

Inflammation: Another cause of vagus nerve dysfunction is inflammation. When there's inflammation in the body, it can irritate the vagus nerve and cause it to malfunction. This can result in pain, fatigue, and even more digestive issues.

Physical Trauma: In some cases, the vagus nerve can be directly damaged by physical trauma. Whether it's a surgical procedure, an injury, or an underlying medical condition, damage to the vagus nerve can cause a variety of symptoms depending on the severity and location of the damage.

Lifestyle Factors: Lifestyle habits can also contribute to vagus nerve dysfunction. Poor diet, lack of exercise, and insufficient sleep can all lead to chronic inflammation and stress, which in turn can interfere with the vagus nerve's ability to do its job.

The vagus nerve plays a big role in your overall health and well-being. By being mindful of the factors that can cause it to malfunction, you can take steps to keep it functioning properly and keep our bodies running smoothly.

5 ways to stimulate the vagus nerve for better health

So, how can you keep your vagus nerve healthy and functioning properly? 

When you activate or stimulate your vagus nerve, it means you're essentially giving it a little boost, helping it to function more efficiently. There are a number of ways to do this, and they range from simple techniques to more advanced practices. Let’s start with the basics.


Magnesium does a lot of heavy lifting in your body. This mineral is responsible for over 300 enzymatic reactions, including muscle and nerve function, blood sugar control, and blood pressure. Magnesium helps keep your nerves healthy by regulating the flow of calcium in and out of nerve cells. And that's important because it helps control the electrical impulses that run through your nerve fibers. When you’re not getting enough magnesium, your nerves can become overstimulated, which can lead to all sorts of unwanted symptoms like muscle weakness, tremors, and even seizures. 

By making sure you’re getting enough magnesium in your diet and supplementing with a liquid magnesium chloride formula, you can support our overall health and wellbeing. So if you're feeling a little off or experiencing any of those pesky nerve-related symptoms, it might be worth checking your magnesium levels.


When you have a diverse and healthy gut microbiome, it sends positive signals to the vagus nerve. And this is where probiotics come in! Probiotics are live bacteria and yeasts found in certain foods and supplements. Certain strains of probiotics, like Lactobacillus and Bifidobacterium, have been shown to increase the production of neurotransmitters like serotonin and GABA. These neurotransmitters play a key role in regulating your mood and anxiety levels. And not only that, but they also act on the vagus nerve, helping to reduce inflammation and improve gut motility.

You can start incorporating more probiotics into your diet with fermented foods like yogurt, kefir, sauerkraut, and kimchi. These foods are packed with probiotics that can be a delicious addition to any meal. You can also take probiotic supplements, just be sure to choose a high-quality brand that contains soil-based strains.

Deep Breathing or Meditation

When you take slow, deep breaths, you activate the part of your nervous system that's responsible for relaxation – the parasympathetic nervous system. This, in turn, stimulates the vagus nerve and helps calm your mind and body.

Deep breathing is one of the easiest and most effective ways to stimulate the vagus nerve. The key is to breathe deeply from your belly, allowing your diaphragm to fully expand and contract. Try taking 10 deep breaths in a row, focusing on the sensation of the air moving in and out of your body.

Sing it Out

When you sing, you naturally elongate your exhalation and engage your diaphragm muscles and vocal cords, which can help stimulate the vagus nerve. In fact, studies have shown that singing, humming, chanting, and gargling can increase the activity of the vagus nerve, leading to improved heart rate variability, reduced anxiety, and even better immune function.

So, the next time you're feeling stressed or anxious, why not try singing your heart out? Whether it's in the shower, in the car, or even at a karaoke night with friends, singing can be a fun and effective way to boost your vagal tone and promote overall wellness. And the best part? You don't have to be a professional singer to reap the benefits. 

Cold Exposure

Studies have shown that exposing yourself to cold temperatures, such as taking a cold shower or dipping our face in ice water, can stimulate the vagus nerve. This can help to reduce inflammation, improve heart rate variability, and boost mood.

Benefits of stimulating your vagus nerve

Your vagus nerve affects your mental and physical health in a variety of ways. By implementing strategies to stimulate it, it may help with the following:

  • Improved mood
  • Better digestion
  • Lowered heart rate
  • Reduced blood pressure
  • Cognitive function
  • Immune response
  • Reduced inflammation

The body’s superpower

Your vagus nerve plays a key role in helping you deal with all sorts of emotional and physical challenges that life throws your way. By paying close attention to your nerve health, you can unlock a whole world of benefits for your overall well-being.