Discover the Nervous System Self-Assessment and learn if your energy regulation system needs support
Do You Feel Dizzy or Lightheaded Just Standing Up?
Ask yourself
- Do you feel faint when standing, leaning on walls or counters for balance?
- Do hot showers leave you weak, like gravity is pulling you down?
- Do you avoid standing in lines because you know you’ll feel faint?
If you answered yes, your autonomic nervous system (ANS) may not be regulating blood pressure and circulation correctly.
Physiological Mechanisms:
- Blunted baroreflex sensitivity: The body’s “blood pressure stabilizer” relies on vagal input to adjust heart rate and blood pressure when you stand.
- Vagal underactivity: When the vagus nerve isn’t firing properly, blood pools in the legs instead of circulating efficiently to the brain.
- Sympathetic surge: The body overcompensates with adrenaline, creating dizziness and faintness.
Research shows taVNS can modulate autonomic outflow and improve markers of autonomic balance, including heart rate variability (HRV) and stress reactivity.
Do You Suffer from a Racing Heart and Palpitations?
Ask yourself
- Does your heart pound when you stand up?
- Do you feel like your heart is racing even when you’re at rest?
- Do you get sudden palpitations that leave you anxious and drained?
Physiological Mechanisms:
- Autonomic imbalance: Sympathetic “accelerator” gets stuck on, vagal “brake” isn’t working.
- Reduced vagal tone: Without vagal counterbalance, HR soars abnormally on standing.
- Overactive adrenaline loop: Your heart races to compensate for poor circulation.
Early studies suggest vagal stimulation can reduce sympathetic activity, shifting the nervous system back toward balance.
Do You Crash from Exhaustion After Simple Activities?
Ask yourself
- Do grocery trips or showers leave you wiped out?
- Do you plan your entire day around pacing energy?
- Do even minor exertions trigger a “post-crash” that takes hours or days to recover from?
Physiological Mechanisms:
- Perfusion failure: Poor blood/oxygen delivery to muscles and brain drives extreme fatigue.
- Sympathetic overdrive: Constant stress signaling drains energy reserves.
- Cellular fatigue: Low vagal tone contributes to oxidative stress and poor mitochondrial recovery.
Pilot studies in post-viral fatigue and Long-COVID cohorts suggest taVNS may improve energy levels and recovery tolerance, with larger clinical trials underway.
Is Brain Fog Stealing Your Clarity?
Ask yourself
- Do you forget what you were saying mid-sentence?
- Do you reread the same page but absorb nothing?
- Do you feel detached in conversations, like your mind is underwater?
Physiological Mechanisms:
- Reduced cerebral blood flow: Poor autonomic regulation limits oxygen to the brain.
- Neuroinflammation: Linked to “slowed processing” in patients experiencing.
- Disrupted neurotransmission: Low vagal tone affects dopamine/acetylcholine, impairing focus and motivation.
Clinical research shows taVNS can influence brain networks involved in attention and working memory, with some studies reporting improvements in clarity and focus.
Do You Sleep but Wake Just as Exhausted?
Ask yourself
- Do you spend 8–10 hours in bed but wake feeling unrefreshed?
- Do you feel wired at night but tired all day?
- Do naps fail to restore your energy?
Physiological Mechanisms:
- Chronic stress mode: The ANS fails to switch into deep parasympathetic recovery at night.
- Poor sleep architecture: Fragmented REM/NREM cycles.
- Overnight sympathetic surges: Heart rate spikes during the night keep the body on high alert.
In a randomized clinical trial, taVNS reduced insomnia severity compared with control, suggesting a role in supporting deeper, more restorative sleep.
Is Postural Heart Rate Abnormalities Affecting Your Digestion and Immunity Too?
Ask yourself
- Do you get bloated after meals or feel nauseous when standing after eating?
- Do you catch colds frequently or recover slowly from minor illnesses?
- Do you have unpredictable bowel habits?
Physiological Mechanisms:
- Gut-brain axis disruption: Low vagal tone impairs digestion and gut motility.
- Immune dysregulation: Poor vagal input weakens the anti-inflammatory reflex.
- Systemic inflammation: Contributes to worsened fatigue and symptom flares.
Vagal pathways help regulate both gut and immune balance; taVNS is being studied for potential benefits in motility and immune signaling.
The Missing Piece Your Doctor Never Learned
Here’s what connects all 6 truths: your vagus nerve controls every one of these processes.
- It regulates blood pressure and circulation.
- It helps calm a racing heart.
- It shapes how your body recovers energy.
- It clears brain fog and supports neuroplasticity.
- It helps synchronize restorative sleep cycles.
- It modulates digestion and immune responses.
These findings support the vagus nerve as a central switchboard for recovery. Non-invasive stimulation is actively being studied as a way to help restore this control system.
Discover Nuropod: The Natural Path to Autonomic Balance
Nuropod offers a scientifically studied, drug-free approach to restore energy and stability by targeting your vagus nerve through auricular stimulation.
Why Nuropod Works:
Evidence indicates taVNS can dampen stress-hormone reactivity, modulate autonomic balance, and improve sleep. Pilot studies in post-viral fatigue and Long-COVID cohorts also report encouraging improvements, with larger clinical trials underway.
Instant ANS reset
Begin rebalancing within minutes of use.
Clinically studied
50+ studies exploring autonomic balance, HRV, sleep, fatigue.
Natural & safe
Non-invasive, no drug interactions.
Nuropod is a general wellness product in the EU and is used under FDA “non-significant risk” designations in U.S. studies.
Endorsed by Leading Autonomic & Recovery Specialists
Real Results from Real People
“From Postural Heart Rate Abnormalities to fewer rough days—take it off for a day and I feel the difference.”
– Nuropod user
“After post-viral dysautonomia, I finally got a foothold out of exhaustion.”
– Sarit
“Constant crashes turned into steadier days. The improvement was immediate.”
– Postural Heart Rate Abnormalities sufferer testimonial
How to Choose a Vagus Nerve Stimulator
With a variety of different devices on the market, it’s important to do the proper research and make the choice that’s right for you. Most importantly, you need to be sure that the intervention you’re looking at has been scientifically proven to target the vagus nerve.
Here are a few of the key factors to consider when making a decision:
- Consult with your health care professional
Before starting any new medical intervention, it’s always a good idea to consult with a medical professional first. For vagus nerve stimulation, choose a neurologist or specialist who is familiar with VNS devices, so they can correctly advise you on if it will help your specific symptoms. - Compatibility with your symptoms
VNS devices are designed to improve specific symptoms, including depressive states, chronic tiredness, gastrointestinal issues, and brain fog. Make sure that vagus nerve stimulation has been studied and evaluated for its effectiveness for your specific health needs. VNS devices also have different stimulation locations, such as the neck and ear. Sensate, which is not a VNS device, claims to stimulate it through the chest. However, Nuropod’s AVNT approach and Gammacore’s approach both have scientific evidence of precise targeting and safety. Other approaches at any location are at best playing the piano out of tune and at worst actively dangerous. - Safety & Wearable Device Status
Many devices claim to be VNS devices and be safe, but it’s important to evaluate the scientific research done on each device to understand its safety profile. Sensate and Pulsetto say that they activate the vagus nerve, but they don’t have any scientific evidence to confirm it. Different methods of vagus nerve stimulation are associated with different side effects too, so it’s good to understand all the risks before you buy. Devices that have obtained certified Wearable Device status are key––this certification requires rigorous quality testing and safety studies to ensure that they don’t harm the nervous system - Effectiveness & Research
Be sure to look for devices backed by scientific research and ideally, placebo-controlled studies. A reputable device will have published research to back up its claims. Randomised placebo-controlled testing ensures that a device’s effects are not based on placebo, giving confidence in the device’s actual therapeutic benefits. Similarly, peer-reviewed studies reduce the risk of biased results and prove the credibility of the device tested.Many devices quote generic VNS research but they haven’t conducted any safety and efficacy studies on their device. Just because a device emits an electrical current where the vagus nerve is located, doesn’t guarantee that it activates the vagus nerve or impacts it positively. Most research on vagus nerve stimulation was done with invasive methods, not portable devices. So a handheld device that references invasive VNS research is falsely representing the data to sell their product.
- Stimulation vs Modulation
It’s also important to be aware that some devices, like Pulsetto or GammaCore, provide high-intensity stimulation which may increase the chance of side effects and may harm people with chronic symptoms whose nervous systems are already dysregulated. Nuropod with 45 energy levels offers precise control of modulation to provide the same benefits with fewer risks.
- Price
The device you choose must fit in your budget. Some devices have a subscription model that requires ongoing payments over time. Others like Nuropod and Sensate are one-time purchases. Because the benefits of using VNS require consistent use, the more they are used, the better the outcomes. Therefore, when considering getting a device, think long term how the costs of long term use would stack up. Taking Nuropod as an example, the cost of the device averages out to approximately 2 EUR per day over a year, and after that there are no more payments. Meanwhile, GammaCore is preloaded with 3 months of sessions. After that, you’ll need to purchase more sessions to continue using it. Pulsetto offers a paid app subscription, so long term costs of use might add up.
Testing Protocol
Since these devices are NOT created equal, it’s essential to carefully evaluate their features, effectiveness, and user experience before making a decision. So we set out to compare four of the most popular devices that people purchase for vagus nerve stimulation – Pulsetto, Sensate, Gammacore, and Nuropod. However, it’s important to note that unlike Nuropod and GammaCore, Pulsetto and Sensate are not certified VNS devices.
For an accurate comparison, we had each device evaluated by a team of PhDs and medical health care professionals. I used each device for one month, with a one-month break after each to avoid any carryover effects. I started with Sensate, then Pulsetto, Nuropod, and finally, GammaCore.
Here are the results and rankings:
| Nuropod | Gammacore | Pulsetto | Sensate | |
| Evaluated in and supported by peer-reviewed placebo-controlled scientific studies | ✓ | ✓ | Χ | Χ |
| Number of scientific studies conducted | 40+ | 20+ | 0 | 0 |
| Scientific studies investment | $10M+ | $50M+ | $0 | $0 |
| Usable without app | ✓ | Χ | Χ | Χ |
| Available without prescription | ✓ | Χ | ✓ | ✓ |
| Mode of action | Auricular Vagal Neuromodulation Therapy (AVNT) | Non-invasive Cervical Vagus Nerve Stimulation (ncVNS) | No validated mode of action | No validated mode of action |
| Target site | Auricular branch of the vagus nerve | Cervical branch of the vagus nerve | Neck | Chest |
| Delivery | Proprietary (Electrical) | Proprietary (Electrical) | Electrical | Vibration |
| Pleasantness of stimulation | Pleasant, mild | More intense, can clench a jaw | More intense | No direct stimulation, pleasant vibratio |
| Is gel needed to use? | No | Yes | Yes | No |
| Battery Life | >1 month | 1 week | 1 week | 1 week |
| Easy to travel with | Yes | No | No | Yes |
| Device type requiring regulatory review and approval before marketing | Required | Required | Required | Χ |
| Approved to be used by the public | ✓ | ✓ | Χ | n/a |
| Certified Wearable Device | ✓ | ✓ | Χ | Χ |
| Medical evaluation process on purchase | ✓ | ✓ | Χ | Χ |
| Documented safety controls | ✓ | ✓ | Χ | Χ |
| SAE (serious adverse events) reported in scientific study | 0 | 0 | No scientific evaluation. Adverse events have been reported online | No scientific evaluation. |
| Risk profile | Low risk based on scientific studies | Low risk based on scientific studies | High risk based on lack of scientific studies and user reports | Low risk based on delivery (vibration) |
| Initial cost | $900 | $450 (first 3 months only) | $233 | $349 |
| Additional costs | $0 | $598 every 3 months | $15 – $45 per month Paid app with more features | $49.99 per year Paid app with more features |
| Total estimated cost over 5 years of daily use | $900 | $14,073 | $931 | $720 |
| Overall Recommendation | Our top pick – Highly recommended | Recommended for headache sufferers | Not recommended | Can be used as a supplementary tool |
Meet The Doctors
A practicing doctor of psychiatry, Elisabetta has an MBA from INSEAD Business School, and experience in direct patient care, neuroscience research, communication and management. Dr. Burchi is a physician-scientist, working with Parasym in clinical affairs with a track record of publishing in the most important scientific journals such as The Lancet, writing successful grant proposals for the NIH, and leading the production of editorial, clinical, regulatory and promotional material in collaborative multidisciplinary teams. Dr. Burchi has also coordinated clinical trials and implemented a tele-medicine practice which received a certification of excellence among more than 100,000 professionals.
Dr. Elisabetta Burchi, MD, MBA
Translational research lead at Parasym
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Participate in the fatigue recovery research study and save 60$ on your Nuropod product.
*Research participation assessment takes less than 3 minutes
50+
Clinical studies referenced
4M+
Sessions delivered
30
Day money back guarantee
certified medical device
Join thousands reclaiming stability and energy.
Participate in our Postural Heart Rate Abnormalities research program and save €70 on your Nuropod product.
*Research participation assessment takes less than 3 minutes
50+
studies referenced
4M+
successful sessions delivered
30
Day money back guarantee
certified medical device
30-Day Money-Back Guarantee
Every Nuropod Kit is backed by a 30-day, full-refund policy if users aren’t satisfied with their progress.
Got questions? Here is everything you need to know
Symptoms we studied
These symptoms have been linked to autonomic nervous system imbalance and Vagus Nerve Impairment:
- Anxious states and Stress related symptoms
- Chronic Tiredness, Fatigue, Brain Fog, Burnout
- Digestive issues, irritable gut reflux, diarrhoea, constipation, bloating
- Sleep problems
- Negative thought
- Inflammatory symptoms
- Pain, headaches
- Memory & Attention problems
- Postural Heart Rate Abnormalities or fainting
- Post-Viral Symptoms
- Widespread body pain
Our latest research data also suggests Nuropod improves learning and short-term memory and cognition.
Nuropod also has been shown to promote relaxation, mood, sleep, healthy digestion, increased HRV, as well as to alleviate symptoms of stress, burnout, adrenal fatigue.
Parasym research is also investigating the impact of neuromodulation on athletic performance, muscle recovery, weight management problems, substance dependency and more.
If you’re not sure if Nuropod is for you consult with your health professional or contact our support by clicking the Support icon at the bottom right of the page.
When can I start feeling the effects?
The timeframe for experiencing the effects of Nuropod varies. Individuals with severe symptoms may notice improvements within 1 to 3 days, while others may see results within 4 to 6 weeks. Rest assured, the transformative benefits of Nuropod will be within reach.
Is Nuropod safe?
Neuromodulation via Nuropod is considered safe when used as intended.
Nuropod has these certificates.
– It is based on scientific evidence
– It is safe to use
– It has demonstrated scientific efficacy
Be sure to read the important safety information before use. Thousands of users have tested the device and no serious adverse effects have been reported in studies to date.
What does it feel like?
Feels like a pleasant, light vibration or tingling sensation in your ear.
Are there any additional costs or subscription fees?
There are no additional costs or fees, only the one-time purchase of the Nuropod.
Before using Nuropod
Read the instructions for use before using Nuropod. However, it’s possible this may not be enough to fully explain the safe and effective use of Nuropod in your particular situation. Ask your health professional or contact Nuropod care if you have any questions about how to use Nuropod or require any further clarification.
Only use Nuropod as described in the instructions for use or as otherwise directed by your health professional. Remove jewelry that may interfere with the electrode location (earrings etc.) before using Nuropod. Do not use Nuropod if the skin on the tragus is broken, cracked or numb.
What is the difference between Nuropod and other devices claiming to stimulate nervous system?
Important Safety Note: Exposing the nervous system to untested electrical currents or using DIY Transcutaneous Electrical Nerve Stimulation (TENS) devices carries risks, including potential nerve damage. Prioritize safety and efficacy in your choice.
Devices claiming to affect vagus nerve differ significantly, impacting their effectiveness and safety. Even small differences in factors like waveform and site placement can yield notable results. Most importantly, level of scientific evidence is crucial.
Nuropod is the leading non-invasive vagal neuromodulation system used in scientific research– with over $10M deployed in scientific studies, 50+ published papers in leading journals covering our exciting and scientifically significant results. Our device is one of a few registered medical devices with safety & efficacy confirmed by regulatory bodies in EU.
How long should I use Nuropod each day for optimal results?
We recommend using Nuropod for 1 hour each day, however, benefits can be seen with as little as 15 minutes of use.
Can I perform other activities while using it?
Yes, you can experience the benefits of Neurostimulation anywhere, anytime while doing any activity.
Do I need a prescription to purchase Nuropod?
No. However, we recommend that you consult with your health professional if you’re unsure whether Nuropod is right for you.
What are the details of your 30-day guarantee?
If you try Nuropod daily for 30 days and aren’t happy with your results, we’ll send you a fund refund. No questions asked.
Given the remarkable results Nuropod has had in scientific studies and with our customers around the world, we’re confident in its health restoring effects. Our goal will always be to restore our collective health – restoring health for as many people as we can and in turn, restoring the health of our planet. If Nuropod doesn’t work for you for any reason, we’re happy to send you a refund. This refund period is available 30 days after the date of purchase and expires the following week (37 days after the date of purchase).
Does Nuropod come with a warranty?
Yes! We offer a one-year warranty with every Nuropod device.
How long do orders take to ship?
Orders are processed and dispatched within 1-3 business days.
When will my order arrive?
Nuropod is shipped via priority tracked and signed couriers, so delivery times will vary based on shipping location. When you checkout, you’ll receive an estimated shipping time for your order.
What is in the Nuropod Package?
- Nuropod device
- Earpiece
- USB charger
- Case
- Quick start guide
How to use Nuropod?
REFERENCES:
- Chakraborty, P., Farhat, K., Morris, L., Whyte, S., Yu, X., & Stavrakis, S. (2023). Non-invasive vagus nerve stimulation in postural orthostatic tachycardia syndrome. Arrhythmia & Electrophysiology Review, 12, e31. https://doi.org/10.15420/aer.2023.20
- Diedrich, A., Urechie, V., Shiffer, D., Rigo, S., Minonzio, M., Cairo, B., Smith, E. C., Okamoto, L. E., Barbic, F., Bisoglio, A., Porta, A., Biaggioni, I., & Furlan, R. (2021). Transdermal auricular vagus stimulation for the treatment of postural tachycardia syndrome. Autonomic Neuroscience, 236, 102886. https://doi.org/10.1016/j.autneu.2021.102886
- Geng, D., Liu, X., Wang, Y., & Wang, J. (2022). The effect of transcutaneous auricular vagus nerve stimulation on HRV in healthy young people. PLOS ONE, 17(2), e0263833. https://doi.org/10.1371/journal.pone.0263833
- Kim, A. Y., Marduy, A., de Melo, P. S., Gianlorenço, A. C., Kim, C. K., Choi, H., Song, J.-J., & Fregni, F. (2022). Safety of transcutaneous auricular vagus nerve stimulation (taVNS): A systematic review and meta-analysis. Scientific Reports, 12, 22055. https://doi.org/10.1038/s41598-022-25864-1
- Stavrakis, S., Chakraborty, P., Farhat, K., Whyte, S., Morris, L., Asad, Z. U. A., Karfonta, B., Anjum, J., Matlock, H. G., Cai, X., & Yu, X. (2024). Noninvasive vagus nerve stimulation in postural tachycardia syndrome: A randomized clinical trial. JACC: Clinical Electrophysiology, 10(2), 346–355. https://doi.org/10.1016/j.jacep.2023.10.015
- Zheng, Z. S., Simonian, N., Wang, J., & Rosario, E. R. (2024). Transcutaneous vagus nerve stimulation improves Long COVID symptoms in a female cohort: A pilot study. Frontiers in Neurology, 15, 1393371. https://doi.org/10.3389/fneur.2024.1393371
The article does not in any way constitute as medical advice. Please seek consultation with a licensed medical professional before starting any treatment. This website may receive commissions from the links or products mentioned in this article.
