Trusted by experts, loved by users
Developed by expert neurologists and leading researches
Repair your nervous system
Backed by Science. Continuously Researched.
Reduction in anxious states
*In a clinical trial, targeted stimulation of the vagus nerve increased vagal tone and inhibited cytokine production in the inflammatory process. Both are important mechanisms for anxiety resilience.
Reduced Fatigue & Increased Energy
*In the study, patients reported sustained improvements even one week after discontinuing the therapy, indicating prolonged relief from fatigue-related symptoms.
Improvement in HRV and Vagus Nerve activity
*In a clinical trial, a one-hour session of Nurosym favourably altered all parameters of Heart Rate Variability, when compared to a placebo. HRV indicates activation of psychophysiological self-repair mechanisms.
Backed by Science. Continuously Researched.
30 Day Money-Back Guarantee
If you try Nurosym for 30 days and aren’t happy with your results, we’ll send you a full refund
Fine-tuning Vagus Nerve Health With AVNT™
The Vagus Nerve acts as the body’s communication highway, linking the brain to vital organs and controlling essential functions like heart rate, digestion, and inflammation response.
Our in-house team of health professionals, scientists, and researchers worked with leading third-party institutions to rigorously study the effects of Vagus Nerve modulation through our proprietary AVNT™ method.
By modulating its activity through precise signal delivery and targeting the right nerve (on-target effect) but no other nerves (off-target effect), Nurosym can optimize this critical pathway, ensuring a seamless brain-body communication to provide wide-ranging benefits.
Our major research milestones:
How It Works
NEURAL REGULATION & PLASTICITY
Nurosym resets healthy brain chemistry and strengthens neuroplasticity
tVNS leads to increased activity in brainstem centers that regulate norepinephrine - responsible for mood, focus, and learning (Zheng 2024)
Scientific Explanation
Neuroplasticity is your brain’s ability to change — to form new connections (learning, focus), strengthen useful ones (habits), and prune away the rest. It’s adaptable. But that adaptability can be helpful or harmful — depending on which circuits get activated repeatedly.
Nurosym VNS lights up specific hubs like the locus coeruleus and brain centers tied to norepinephrine, dopamine, serotonin (focus, mood, motivation). Increased activity here means the brain prioritizes these routes. Nurosym sessions systemically retrain healthy brain chemistry and stable mental patterns.
INFLAMMATORY CYTOKINES REDUCTION
Nurosym regulates inflammation and unblocks energy production
78% reduction in IL-6 harmful cytokines (Dasari 2023)
Scientific Explanation
Cytokines are tiny immune messengers, but when overproduced, they can shut down the body’s ability to create and use energy.
In balanced levels pro-inflammatory cytokines (IL-6 and TNF-α) are designed to fight infection.
When in high doses, they can cross the blood-brain barrier and disrupt mitochondrial function in cells, leading to tiredness and a weaker immune system.
Nurosym activates vagal anti-inflammatory pathways that suppress excessive immune signaling.
AUTONOMIC TONE BALANCE
Nurosym regulates HRV and vagal tone for optimal nervous system resilience
18% increase in HRV and 61% increase in vagal parasympathetic activity compared to placebo (PLOS ONE journals)
Scientific Explanation
RMSSD measures HRV (heart rate variability) and is sensitive to parasympathetic changes. A high level indicates a favorable shift in your nervous system balance toward parasympathetic dominance, boosting the body’s psychophysiological self-repair mechanism and nervous system resilience.
In a two-stage trial, Nurosym neuromodulation produced 61% increase in vagal tone (HF power), and 18% increase in HRV. These effects persisted beyond the trial, demonstrating a carry-over effect.
FREQUENTLY ASKED QUESTIONS
Some of the most asked questions, answered
Contraindications
Nurosym is NOT recommended in the following cases for users:
- Undergone surgery to cut the vagus nerve (cervical vagotomy)
- Diagnosed with severe low resting heart rate
- Permanent implanted metallic/electronic device or jewellery at close proximity to the ear tragus (that cannot be removed before using Nurosym);
- Pregnant women.
Below are listed situations that are also contraindications unless the user receives a concrete health opinion on the device use by their health professional and is under the supervision of a health professional while using the device.
If you fall under one of these categories, your health professional might advise whether, in your specific case, the device is safe to use, potentially following certain precautions or under specific supervision:
- Users with any active implanted device (including electronic and/or medical devices) e.g. cochlear implant, cerebral shunts, invasive vagus nerve stimulators, pacemakers or non-active but potentially interacting with the nervous system (e.g. metal implants);
- Users with known severe coronary disease or recent heart attack (within 5 years);
- Paediatric users (children)
*Pregnant women have not been evaluated in scientific studies.
*Both paediatric users and users with pacemakers have been enrolled in scientific studies with Parasym technology, and no device related adverse events or interferences have been observed so far in the scientific setting.
30-Day Money Back Guarantee
Our 30-day money-back guarantee ensures your satisfaction with Nurosym. We're confident in its health-restoring effects, supported by remarkable results from scientific studies and positive feedback from customers worldwide so if for any reason Nurosym doesn't meet your expectations within 30 days of receiving it, simply return it with the provided tracking code, and we'll issue a refund promptly. We're committed to your health and well-being, and your satisfaction is our top priority.
Your satisfaction is our top priority, and we want you to feel confident in your purchase. If you are not completely satisfied, we will ensure that your refund is processed promptly and hassle-free.
Shipping & Returns
- We ship to all EU countries & UK and selected countries worldwide. If you can check out on our website, you can assume we can ship to you.
- We ship from Netherlands.
- Due to increased demand, orders are now temporarily processed and dispatched within 1-3 business days.
- You should receive your device within a few days after shipping depending on your location.
- There should not be any extra costs if you are inside the EU. If you are outside of the EU, you may be liable for import fees, which are out of our control.
- We know the impact Nurosym can have if used daily for 30 days, this is why we offer our guarantee. If you aren't happy after using Nurosym daily for 30 days, you can claim a full refund of your Nurosym Kit. This refund period is available 30 days after the date of purchase and expires the following week (37 days after the date of purchase).
Got Questions? Contact Us
For help with returns or warranty claims, simply reach out to our customer care team via the support widget in the bottom right hand corner of our website. We’ll provide personalized assistance to guide you through the process and address any concerns you have.
Medical Disclaimer
Always verify device certification before purchase. CE Certification is the only valid medical device certificate in Europe. Beware of manufacturers using non-medical device certifications such as FCC certificates. An FCC certification does not imply that the product is safe or durable. It simply means that it meets regulated limits for ionizing radiation. A certification does not imply that the device was manufactured in any specific way. FCC approval can be granted as long as the electronic device meets FCC emission rules and regulations and has been tested to comply with FCC standards. Exposing the nervous system to untested electrical current can risk permanent nerve damage, exacerbation of symptoms or death.
What Does Nurosym Do
With Nurosym you can:
- Recover and activate your self-repair mechanisms by countering dysregulation in the nervous system.
- Build up your stress resilience, recover faster from stressful events and help prevent mood swings.
- Counter post-viral symptoms, like fatigue or brain fog.
- Maintain optimal HRV, recovery and reduce cardiovascular health risks.
- Relax and stabilise your mental state to help you fall asleep faster, achieve high-quality sleep, wake up more with more energy and fewer negative thoughts.
- Improve digestive function by promoting healthy communication through the gut-brain axis.
- Reduce inflammation, pain and discomfort linked to your nervous system.
- Strengthen cognitive performance & focus to counteract the effects of aging.
How does Nurosym achieve all of this?
Nurosym is a wearable device that sends electrical impulses to the brain via the vagus nerve to alleviate symptoms of dysregulated nervous system. Modern science has discovered that many chronic mental & physical symptoms are linked to chronically dysregulated nervous system. The nervous system and one of its largest nerves - the vagus nerve - controls all body functions, from breathing, heart rate, digestion to energy, calmness and mood. When the vagus nerve is not functioning properly, organs & systems of the body don’t work in harmony leading to poor physical & mental health. By strengthening the nervous system in a natural way through modulating the activity of the vagus nerve, Nurosym helps restore balance to the mind and body.
Nurosym exerts its effects through various mechanisms:
- It triggers the “rest and digest” response, promoting relaxation, lowering heart rate and improving digestion.
- Reduces inflammation markers leading linked to pain & overactive immune response
- Decreases oxidative stress markers linked to chronic diseases and ageing.
- Increases neuroplasticity, rewiring the brain for better mood, better motor & cognitive learning and recovery from neurological symptoms.
This way Nurosym supports mental & physical health and helps alleviate symptoms of a range of symptoms.
Nurosym is a certified wearable device delivering proprietary Auricular Vagal Neuromodulation Therapy (AVNT)™ developed by Parasym, scientifically validated and optimised in 50+ scientific studies conducted in partnership with leading scientific research institutions including Harvard and UCLA.
Nurosym is the only certified wearable device approved for the purpose of targeting the vagus nerve via the ear available without prescription. It is the most studied neuromodulation system of this kind, widely considered as the gold standard in scientific neuromodulation research.
Symptoms 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 thoughts
- 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 Nurosym improves learning and short-term memory and cognition.
Nurosym 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 Auricular Vagal Neuromodulation Therapy on athletic performance, muscle recovery, weight management problems, substance dependency and more.
If you’re not sure if Nurosym is for you consult with your health professional or contact our support by clicking the Support icon at the bottom right of the page.
Scientific Evidence & Research
Nurosym has partnered with 60+ research institutions, including UCLA and Harvard, to conduct scientific studies to validate the health benefits of Nurosym.
Our research is founded on these principles:
- Parasym’s studies are led by independent university experts, with no financial ties to us, unless explicitly mentioned.
- Our research is externally funded, ensuring unbiased and genuine results.
- We value transparency: All our study findings (positive or otherwise) are open and accessible to everyone.
- We collaborate with distinguished physicians and scientists, ensuring the pinnacle of research quality.
- At Parasym, we adhere to the highest scientific standards, consistently achieving significant and trustworthy results in the most stringent tests. A large part of our scientific evidence comes from Randomised Placebo-controlled Scientific Studies, which are considered the highest standard of evidence.
Results From Scientific Studies
Actividad del nervio vago
Síntomas post virales
Fatiga, niebla cerebral, síntomas gastrointestinales, dolor
Fatiga
Sueño
Inflamación
Cambio postural del ritmo cardíaco
Variabilidad de la frecuencia cardiaca
Puntuación depresiva
Estrés oxidativo
Memoria
Lectura
Macrocirculación
Microcirculación
Deficiencia de atención
Estados de pensamientos ansiosos
Palpitaciones
Función del músculo cardíaco
Síntomas gastrointestinales
Presión arterial
Resultados en poblaciones de estudio específicas. Los resultados individuales pueden variar.
How to Use
Watch Dr Denef explain how to use Nurosym:
How to use Nurosym in a few steps:
- Apply a bit of moisture on the tragus.
- Wear the earpiece correctly on your left tragus, the cable should go over and behind your ear to keep the electrodes in place.
- Turn on Nurosym
Slowly increase energy level until you feel a light tingling sensation in your ear. - Notice how pleasant the sensation of neuromodulation feels. This is a signal that the current is flowing and that your parasympathetic nervous system is activated.
- Sit or lie down with the device or perform daily activities while Nurosym works to strengthen your parasympathetic nervous system, decrease inflammation, oxidative stress and activate neuroplasticity to help you feel better.
- Notice the sensations of calmness, relaxation, decreased stress, improved mood, more energy flowing into your body.
- If you feel the sensation intensifies over time or you stop feeling it, adjust the energy level until you feel a light pleasant tingling sensation again.
- Continue using Nurosym every day for 30-60 mins a day, preferably in the morning or split between morning after waking up and evening before sleep and enjoy better health & mood.
Vea al Dr. Denef explicar cómo utilizar Nurosym:
Cómo utilizar Nurosym en pocos pasos:
- Aplique un poco de humedad en el tragus.
- Colóquese el auricular correctamente en el tragus izquierdo, el cable debe pasar por encima y por detrás de la oreja para mantener los electrodos en su sitio.
- Encienda Nurosym
Aumente lentamente el nivel de energía hasta que sienta un ligero cosquilleo en la oreja. - Observe lo agradable que resulta la sensación de neuromodulación. Esta es una señal de que la corriente está fluyendo y de que su sistema nervioso parasimpático está activado.
- Siéntese o túmbese con el dispositivo o realice las actividades diarias mientras Nurosym trabaja para fortalecer su sistema nervioso parasimpático, disminuir la inflamación, el estrés oxidativo y activar la neuroplasticidad para ayudarle a sentirse mejor.
- Note las sensaciones de calma, relajación, disminución del estrés, mejora del estado de ánimo, más energía fluyendo en su cuerpo.
- Si nota que la sensación se intensifica con el tiempo o deja de sentirla, ajuste el nivel de energía hasta que vuelva a sentir un ligero hormigueo agradable.
- Siga utilizando Nurosym todos los días durante 30-60 minutos al día, preferiblemente por la mañana o repartido entre la mañana después de despertarse y por la noche antes de dormir y disfrute de una mejor salud y estado de ánimo.
Why Trust Nurosym
Gold standard in scientific research
- Nurosym is a certified medical device, with over $10M deployed in scientific research, 60+ partner research organisations including Harvard, UCLU, 50+ published papers in leading journals covering our exciting and scientifically significant results.
- This is why Nurosym is the leading non-invasive vagal neuromodulation system used in scientific neuromodulation research and now widely adopted.
Certified medical device (CE) in the EU with confirmed safety and FDA Non-Significant Risk Designation
Nurosym is a certified medical device (CE) in Europe. It has also received FDA Non-Significant Risk Designation in multiple studies in the US. This means:
- It has been audited by medical regulators
- It is based on rigorous scientific evidence
- The benefits outweighs the risks
- It has demonstrated scientific efficacy
- It has strict quality management systems
Be sure to read the important safety information before use.
- Exposing your nervous system and brain to untested electrical currents can put you at risk of a permanent damage to the brainstem and vagal nerve fibres, worsening your symptoms. Never use or suggest using DIY electrical current devices on your nervous system.
- Ensuring safety and efficacy requires extensive scientific studies that cost millions of dollars. This is why few neuromodulation devices have been certified by health regulatory bodies as safe and effective.
- Beware of websites claiming to deliver benefits from uncertified therapies that present online reviews instead of scientific evidence. Carefully verify if a therapy you’re evaluating is registered as a medical device, which certifies it is safe and effective to use.
- When considering any health intervention, be sure to evaluate the status of certification, scientific evidence, warnings and seek advice of trusted health care professionals.
- Nurosym is one of a few registered neuromodulation based medical devices with safety confirmed by regulatory bodies in EU in Randomised Placebo Controlled Studies.
Proven target activity
- In addition to safety, it is crucial to consider efficacy of various devices.
- The fact that a device is delivering a safe electrical current is not enough.It also needs to demonstrate that it indeed stimulates the right nerves and activates them. Triggering nerve action potential to fire requires precise waveform, frequency, wavelength and amplitude of electrical signal, as well as a specific stimulation site on the body closest to a particular branch of
- Without scientific data, we cannot know if a device is 1)actually stimulating the right neural pathways 2)not stimulating unintended neural pathway.
- Nurosym is demonstrated in scientific studies to stimulate the brainstem via the vagus nerve. Our patented waveform that exerts these effects has been developed over 8 years of laborious research with a total cost of over $10M.
Efficacy confirmed in Randomised Placebo Controlled Studies
- Many devices on the market claim benefits when combined with other practices such as meditation or breathing, which independently provide benefits such as relaxation, reduced anxious states, mood, stress, sleep. This fact makes it hard to discern whether claimed benefits are due to the device itself or the additional practice.
- What’s more placebo effect is a strong influencer on benefits of numerous devices. Only randomised placebo controlled scientific studies can demonstrate whether a device benefit is independent of the placebo effect. Make sure to verify quality of evidence provided by the manufacturer.
- Nurosym has demonstrated benefits independent of other practices in a number of Randomised Placebo Controlled Studies.
Try risk-free for 30 days
Experience Nurosym at home and return it for a full refund if you don't love it
Certified medical device
Resets your resting state for deeper sleep and more daily energy
Worry-free warranty
Ongoing device protection for up to 5 years.
Sources
1. Abhijit Chaudhuri
“Autonomic dysfunction in chronic fatigue syndrome”
QJM: An International Journal of Medicine, 2022
2. Frontiers in Neurology
Intense illumination in the morning hours improved mood and alertness but not mental performance.
Zheng et al., 2024 — Zheng, Z. S., Simonian, N., Wang, J., Rosario, E. R.
Read Article3. Journal of Cardiac Failure 29(4): 660–661
Effects of low level tragus stimulation on inflammation in acute decompensated heart failure
Dasari et al., 2023 — University of Oklahoma Health Sciences Center / Dasari, T. W., Akhtar, K. H., Amil, F., Zhao, Y. D., Sohinki, D., Po, S.
Read Article