Why optimize HRV?
"Heart Rate Variability (HRV) is the ultimate biomarker for nervous system health, recovery, and resilience. Easily seen via Apple Watch, Whoop band or other biofeeback devices, HRV directly measures the body's stress levels, innate healing reflex, fitness, sleep quality and more.
Vagus Nerve activity (links every major organ to the brain) relaxes our nervous system, keeps it strong and healthy, thus dramatically boosting HRV score."
Physiology
AVNT™ is clinically validated to boost HRV by 18% in 5 minutes vs placebo*
HRV link: RMSSD (ms) is the method most biofeedback devices measure HRV (heart rate variability) and is sensitive to parasympathetic changes. A high level indicates a favorable shift in your nervous system balance toward parasympathetic, "rest-and-digest" dominance, boosting the body’s psychophysiological self-repair mechanism and nervous system resilience.
Clinical trial results: In a two-stage trial, Nurosym neuromodulation produced 61% increase in vagal tone (HF power), and 18% increase in HRV within 5 minutes compared to placebo* (The effect of transcutaneous auricular Vagus Nerve stimulation on HRV in healthy young people, Geng et al., 2022, PLOS ONE). These effects persisted beyond the trial, demonstrating a carry-over effect.
Highly Recommended
"I was drawn to vagal nerve stimulation after discovering my blood pressure was elevated and my HRV was poor. After researching the available devices it was clear that Nurosym was expertly developed and backed by multiple research publications.... both my BP and HRV readings returned to normal within the first month of use.
Resilience
AVNT™ breaks the chronic stress loop (when your body's never truly relaxed)
HRV link: You feel "wired but tired." Even when you sit to relax, your chest feels tight, your mind races, and you stay tense. When stuck on the gas pedal your heart beats irregularly, which drains energy and crashes daily HRV score.
Root cause: Why your body refuses to relax? Because your brain's threat center (the amygdala) starts treating everyday stress as life-or-death situations. It relentlessly floods your body with cortisol, locking you in "fight-or-flight" mode and blocking your natural ability to recover.
Nurosym AVNT™ VNS mechanism:
Nurosym acts as your nervous system's emergency brake. By sending gentle neural signals through your ear, it bypasses the stress and speaks directly to your brainstem to turn off the alarm. It safely breaks the loop, telling your body "you are safe" so your heart can finally return to a calm, flexible rhythm.
- Stop the spiral: Quiet your racing mind and release physical chest tension so you can actually shut down and unwind after a chaotic day.
- Stay composed under pressure: Build real resilience to everyday stressors—so you stay calm instead of instantly reacting or panicking.
I am genuinely astonished...
"I feel more regulated, calmer, and better equipped to handle daily stress, and the HRV data reflects exactly how much my nervous system has benefited. Seeing such measurable progress has been both motivating and reassuring."
Resilience
AVNT™ helps enhance physical capacity and endurance
HRV link: You push hard, but hit a wall. Your limbs feel heavy, and deep fatigue sets in fast. This physical exhaustion correlates with a low HRV, meaning your system cannot adapt to the heavy strain. Your heart struggles to pace your energy, crashing your stamina.
Root cause: Why do you gas out so quickly? Without a healthy functioning Vagus Nerve, your nervous system struggles to optimize blood flow and deliver oxygen efficiently. Your muscles drown in fatigue signals, forcing you to quit.
Nurosym AVNT™ VNS mechanism:
Nurosym acts as a biological pace-setter. By sending precise signals through your ear, it stimulates the vagus nerve to stabilize your autonomic response. This helps enhance microcirculation and oxygen delivery, delaying physical fatigue so you can sustain peak effort longer.
- Shatter your ceiling: Sustain high-output energy for longer periods without hitting that agonizing, heavy mid-workout wall.
- Bounce back faster: Keep your heart adaptable, allowing you to recover rapidly between intense intervals or demanding physical tasks.
Performance enhancement
"The benefits I've experienced include a measurable reduction in stress, improved recovery metrics as measured by my WHOOP device, and an increased ability to focus or train for long periods of time."
Resilience
AVNT™ lets you get more out of sleep
HRV link: You spend 7-8 hours in bed but feel tired the next day. You wake up around 3AM, struggling to fall asleep. These kind of sleep issues correlate directly with HRV. The hours are there, but the effect you seek is not.
Root cause: Why does your brain refuse to power down? Even in the dark, your mind stays on high alert. This spikes your body with cortisol instead of mellatonin, blocking your transition into the deep, slow-wave sleep phases where true physical recovery happens.
Nurosym AVNT™ VNS mechanism:
Nurosym helps release mental and physical tension that breaks the nighttime cortisol stress spikes, signaling safety so your body can finally sink into a heavy, restorative sleep rhythm.
- Shut down rapidly: Quiet your racing thoughts the moment you hits the pillow so you can fall into a deep sleep without staring at the ceiling.
- Awaken genuinely recharged: Fully replenished morning HRV, giving you the raw, clean energy to dominate your day.
For the guts and mind
"We have noticed higher energy levels, improved digestion, higher HRV levels, improved sleep, and better stress management. We feel immediately calmer during and after the session, and we finally get a full night's rest"
Recovery
AVNT™ helps accelerate post-workout recovery
HRV link: Your muscles ache, your joints are stiff, and your body feels heavy days after a training block. This lingering soreness correlates directly with a crashed HRV. Your system struggles to pace the optimal blood flow required to effectively clear out metabolic waste.
Root cause: Why does it take so long to bounce back? Physical strain tears muscle fibers and floods your tissue with lactic acid. If you cannot quickly shift into recovery state, blood vessels stay constricted. You miss the critical repair window, leaving muscles starved of nutrients and drowning in fatigue markers.
Nurosym AVNT™ VNS mechanism:
Nurosym acts as a biological fast-forward button for physical repair. It stimulates the vagus nerve to help trigger widespread vasodilation. It actively opens up your circulatory pathways, helping your body flush out trapped metabolites and shuttle vital nutrients directly to damaged tissue.
- Shorten downtime: Rapidly clear metabolic waste from muscles so you can hit your next training session feeling fresh, fluid, and powerful.
- Maximize adaptation: Shift out of the breakdown phase into the deep repair state where cellular regeneration and muscle growth happen.
So happy with Nurosym ❤️
"My HRV improved and my regeneration is way faster."
Recovery
AVNT™ helps activate the rest-and-digest system on-demand
HRV link: You rush through a quick meal between meetings, and your stomach instantly ties in knots. This heavy, bloated discomfort correlates directly with a crashed HRV. When your system is stressed your body actively shunts blood away from your gut, bringing digestion to a grinding halt.
Root cause: Relentless daily pressure starves your enteric nervous system—your gut's secondary brain—of vital blood flow. Without a strong vagal signal to release acetylcholine, the core neurotransmitter responsible for gastric motility, your digestive tract simply shuts down to conserve energy.
Nurosym AVNT™ VNS mechanism:
Nurosym acts as a biological switch for your digestive tract. It targets the vagus nerve to help trigger the release of acetylcholine. This actively supports the parasympathetic "rest-and-digest" pathway, helping redirect blood flow back to your gut.
- Release the knots: Ease the tight, stagnant feeling in your stomach after meals so you can comfortably move through your afternoon.
- Optimize natural digestion: Support your gut's natural motility to efficiently extract the clean energy you need to perform.
HRV booster...
"I’ve struggled with a consistently low HRV for years, averaging around 26 each month. Since using Nurosym, I’ve consistently seen a 10–20% increase... valuable in helping me balance a high-cognitive-load job, regular training, and family life."
Resilience
AVNT™ helps reach the calm state required for deep relaxation techniques
HRV link: You sit down to breathe, but your mind races and your chest stays tight. Trying to force a calm state through sheer willpower creates active mental friction. This frustration suppresses your parasympathetic tone, locking your heart into a poor rhythm that actively crushes your HRV.
Root cause: A highly stressed brain is dominated by fast-paced Beta waves and an overactive Default Mode Network (DMN)—the brain's rumination center. When hyper-aroused, forcing "top-down" relaxation through conscious thought becomes physiologically exhausting and often impossible.
Nurosym AVNT™ VNS mechanism:
Nurosym delivers "bottom-up" biological support. It directly reaches the nucleus tractus solitarius (NTS) in your brainstem. This helps passively modulate your DMN and shift brain activity toward calmer Alpha frequencies, bypassing the need for mental focus.
- Bypass the mental friction: Passively shift into a state of physiological calm.
- Aid the effect of traditional relaxation practices: Build resilience even on your most chaotic days and get the most out of breathing, cold exposure, meditation and other techniques.
Definitely recommend!
"i have used Nurosym for a few months now. It is super easy to learn and easy to fit into your routine since you can be doing other things while it is on. I have noticed an increase in my HRV and an improvement in sleep quality "
Physiology
AVNT™ helps the body flush out cortisol and other stress chemicals
HRV link: It's relaxation time, but you feel jittery, like you've had too much coffee. This toxic, wired sensation directly signals a crashed HRV. Because your bloodstream is saturated with lingering stress chemicals, your heart beat stays disrupted.
Root cause: Chronic stress overstimulates your HPA (Hypothalamic-Pituitary-Adrenal) axis, constantly pumping out cortisol and other stress chemicals. Cortisol's job is to keep our body awake and alert. Blood gets diverted away from your liver and kidneys and slows down the clearance of such chemicals.
Nurosym AVNT™ VNS mechanism:
Nurosym helps reset your brain chemistry. It helps downregulate HPA axis activity, signaling your adrenal glands to stop the cortisol drip. This helps restore blood flow to your filtering organs to clear the residual static.
- Flush the tension: Help clear the spiking cortisol, allowing you to physically and mentally decompress after high-stakes moments.
- Promote healthy chemicals: Nurosym VNS lights up specific hubs like the locus coeruleus and brain centers tied to norepinephrine, dopamine, serotonin (focus, mood, motivation).
Regeneration for Body and Mind
"My HRV readings (170–220 ms, measured with a chest strap) have improved noticeably ... challenges that used to feel stressful or intimidating have become much easier to handle, and my overall mental state feels more balanced and grounded."
Resilience
AVNT™ helps you be more adaptable and boost cognition (neuroplasticity)
HRV link: You stare at a complex report, but your brain feels like looking through a fog. This correlates with a low HRV. A disrupted heart actively starves your brain of the energy required for sharp, high-level cognition.
Root cause: Why does your mind freeze when the stakes are highest? Relentless pressure forces your brain into survival mode, actively suppressing Brain-Derived Neurotrophic Factor (BDNF)—the crucial protein required to grow new neural pathways. Instead of adapting, your brain locks its doors.
Nurosym AVNT™ VNS mechanism:
Nurosym is a catalyst for mental clarity. It helps activate your brain's locus coeruleus. This triggers a release of acetylcholine and noradrenaline, reopening your "neuroplasticity" so you can easily process and map new information.
- Shatter the afternoon fog: Counter cognitive fatigue that hits at 3 PM, allowing you to lock into deep, unbroken, concentrated work.
- Accelerate mental agility: Support your brain's natural ability to wire new connections, helping you rapidly process dense data and adapt to sudden high-pressure challenges.
Game changer for me
"Within the space of 6 months: further improvement in jaw pain by about 80%, improvement in cognition, alertness, memory, cognitive fatigue, happiness levels,"
Physiology
AVNT™ downregulates the body's systemic inflammation processes
HRV link: Your joints ache, your muscles feel heavy, and your body feels perpetually sluggish and swollen. Lingering systemic inflammation is a known HRV killer. Your immune system is constantly battling invisible internal fires, silently draining your daily battery.
Root cause: Relentless daily friction forces your immune system into overdrive, triggering the overproduction of pro-inflammatory cytokines. Without a strong vagal brake to stop them, these aggressive immune cells flood your bloodstream, leaving your tissues in a perpetual state of low-grade swelling.
Nurosym AVNT™ VNS mechanism:
Nurosym VNS activates the cholinergic anti-inflammatory pathway, prompting the release of acetylcholine, which binds to receptors on immune cells to halt the production of pro-inflammatory cytokines (like TNF-alpha). Lower inflammation translates directly to higher, more resilient HRV scores.
- Extinguish the internal fire: Ease lingering physical stiffness and heavy tissue tension, allowing your body to cool down.
- Stop the internal wear-and-tear: Downregulate chronic immune strain to support the clean biological energy your body needs to rebuild.
It works
"I have been using for a month daily. I was sceptical but willing to try anything to manage symptoms of an autoimmune condition. I experience improvement in sleep time, rem and deep sleep. Improvement in hrv and less brain fog."
If you try Nurosym daily for 30 days and aren't happy with your results, we'll send you a full refund of your Nurosym Kit. No questions asked Given the remarkable results Nurosym 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 Nurosym 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). The refund will be issued once we receive your tracking code for the return.
To receive a refund: contact us
Experience the future of bioelectric medicine
Experience the future of bioelectric medicine
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.