NeuroQuiet Review 2026: Does It Really Support Hearing?

Editorial Review Team

Independent Health & Supplement Research · July 2026 · 12-min read

★★★★

4.1 / 5.0

⚡ Quick Verdict

✅ Natural formula with research-backed ingredients

✅ Sublingual spray for faster absorption than capsules

✅ 90-day money-back guarantee — low financial risk

✅ Targets both tinnitus and cognitive well-being

NeuroQuiet at a Glance

Label Value
Product Name NeuroQuiet
Formula Type Sublingual oral spray
Purpose Support healthy hearing, reduce tinnitus-related discomfort, boost cognitive clarity
Key Benefits • Supports ear health and reduces noise perception
• Promotes relaxation and stress relief
• Boosts dopamine production and mood
• Enhances cognitive function and focus
• Improves blood circulation to the inner ear
How to Use 2 sprays in the morning + 4 sprays before bedtime. Hold under tongue for 20 seconds, then swallow. Avoid food/drink 30 min before or after.
Side Effects Generally well tolerated; possible mild reactions in sensitive users (see Side Effects section)
Price 2 Bottles (60-day): $79/bottle — $158 total + shipping
3 Bottles (90-day): $69/bottle — $207 total + free US shipping
6 Bottles (180-day): $49/bottle — $294 total + free US shipping
Guarantee 90-day money-back guarantee (no-questions-asked)
Availability Official website only
Official Site Visit Official Site →

NeuroQuiet review
NeuroQuiet review

The Constant Ringing That Won’t Let You Rest

Imagine trying to fall asleep while a high-pitched tone buzzes inside your ears. You turn off the TV, the room goes quiet — but the sound doesn’t stop. It’s just there, relentless and exhausting. Millions of people worldwide deal with exactly this reality every single day, and it affects far more than just their hearing. It disrupts sleep, crushes concentration, and quietly wears down mental well-being over time.

NeuroQuiet is a new hearing health supplement that claims to tackle this problem from a neurological angle. Rather than masking the noise externally, it targets the brain-ear connection using a blend of natural compounds in a sublingual spray format. This NeuroQuiet review takes an in-depth, unsponsored look at the formula — who makes it, what’s actually in it, and whether the science holds up.

This article is written for adults who are exploring natural options to support their hearing health and want clear, balanced information before spending their money. We cover everything: the ingredients, how it works, realistic timelines, known limitations, and honest user feedback.

What Is NeuroQuiet?

NeuroQuiet is an oral supplement developed by Christian Toller, a researcher who spent years studying auditory health and natural solutions for tinnitus-related discomfort. The product is manufactured and sold under the NeuroQuiet Research brand, distributed through BuyGoods — a registered Delaware-based retailer that handles many direct-to-consumer supplement products in North America.

What sets NeuroQuiet apart from traditional hearing supplements is its delivery format. Instead of a standard capsule, it comes as a sublingual spray. You apply it directly under the tongue, where the mucous membrane allows active compounds to absorb into the bloodstream more quickly than the digestive system would. This approach is well-established in pharmaceutical settings and can offer an advantage over swallowed capsules for certain ingredients.

The product’s label states it’s assembled in the United States. The official site displays certification badges suggesting GMP-compliant production standards, though the exact manufacturing facility is not disclosed. Its formula combines six core ingredients — all naturally derived — targeting both auditory function and broader cognitive well-being. It’s available exclusively online through its official website.

🇺🇸 Made in USA
✅ GMP Certified
🌿 Non-GMO Formula
🔬 Natural Ingredients

The Problem: Why Tinnitus Is So Hard to Treat

Tinnitus — the perception of sound with no external source — affects an estimated 15% of the global population. For many people, it’s a minor annoyance. However, for roughly 20% of those with tinnitus, the condition is severe enough to significantly impact daily life. Traditional approaches tend to focus on symptom management: white noise machines, ear protection, cognitive behavioral therapy. These methods help some people, but they rarely address what’s happening at the neurological level.

Research increasingly points to a disruption in neurotransmitter signaling — particularly dopamine and GABA — as a contributing factor in how the brain processes (and misprocesses) auditory signals. When these chemical messengers fall out of balance, the auditory cortex can become hyperactive, generating phantom sounds. Furthermore, poor blood flow to the delicate structures of the inner ear can accelerate hearing decline and worsen noise perception.

NeuroQuiet approaches this from the inside out. Rather than suppressing external sound, it aims to restore the neurochemical environment that supports healthy auditory processing. That’s an interesting angle — and it’s worth examining whether the ingredients actually support that goal.

✅ Check NeuroQuiet Price & Availability →

How Does NeuroQuiet Work?

The formula works through three complementary pathways. First, it aims to restore neurotransmitter balance — specifically by supporting dopamine and GABA levels, which play key roles in how the nervous system interprets sensory input. When these signals are stable, the brain is less likely to generate or amplify phantom noise.

Second, NeuroQuiet includes ingredients that support circulation. Better blood flow to the cochlea — the spiral-shaped structure inside the ear responsible for converting sound vibrations into nerve signals — may help protect against the kind of cellular stress that contributes to hearing decline over time.

Third, the formula targets cognitive function and stress resilience. Chronic tinnitus often creates a feedback loop: the noise causes anxiety, anxiety heightens the perception of noise. By supporting focus, calmness, and mental clarity, NeuroQuiet may help break that cycle — even if it doesn’t eliminate the underlying sound entirely. The sublingual delivery method accelerates the absorption of these compounds, potentially making them more bioavailable than equivalent doses in capsule form.

NeuroQuiet Ingredients: A Deep Dive

Here’s what the research shows about each of the six active ingredients in NeuroQuiet. Note that the company does not publicly disclose exact milligram amounts per serving, which limits how precisely we can evaluate potency.

🧠 Alpha-GPC

Alpha-glycerylphosphorylcholine (Alpha-GPC) is a choline compound that crosses the blood-brain barrier with relative ease. Inside the brain, it serves as a precursor to acetylcholine — the neurotransmitter most associated with memory formation, learning, and sustained attention. Several clinical trials have demonstrated its ability to support cognitive function in healthy adults and older populations alike.

In the context of hearing health, cognitive clarity matters more than people often realize. Tinnitus is partly a brain problem, not just an ear problem. When acetylcholine signaling improves, the brain becomes better at filtering and organizing incoming sensory data. That means sharper focus, better mental endurance, and potentially less cognitive amplification of the phantom sounds that define tinnitus.

🌊 GABA (Gamma-Aminobutyric Acid)

GABA is the brain’s primary inhibitory neurotransmitter. Think of it as the nervous system’s natural “calm down” signal. When GABA levels are healthy, neural activity stays regulated. When they drop — due to chronic stress, poor sleep, or other factors — the auditory cortex can become overactive, generating or amplifying internal noise.

The challenge with oral GABA is that its ability to cross the blood-brain barrier is debated in research circles. However, some studies suggest that supplemental GABA may still exert effects on the nervous system through peripheral pathways. In a sublingual spray like NeuroQuiet, absorption may differ from a standard swallowed dose, potentially offering a more direct route into systemic circulation.

🫘 L-Dopa Bean (Mucuna Pruriens)

Mucuna pruriens is a tropical legume that contains L-DOPA (levodopa) — a direct precursor to dopamine. Unlike dopamine itself, L-DOPA can cross the blood-brain barrier and convert into the neurotransmitter directly. Research on Mucuna pruriens has explored its application in mood support, stress resilience, and neurological conditions where dopamine is depleted.

For tinnitus sufferers, the dopamine connection is meaningful. Emerging research suggests that dopamine pathways in the auditory system influence how the brain gates and filters sound. A well-supported dopamine system may reduce the emotional distress associated with tinnitus and, in some cases, alter the perceived intensity of the ringing. It’s worth noting that high doses of L-DOPA carry potential side effects, so dosage transparency would strengthen confidence in this ingredient’s inclusion.

🏔️ Moomiyo (Shilajit)

Moomiyo — also known by the Sanskrit name Shilajit — is a mineral-rich resinous substance found in mountainous rock formations across Central Asia and the Himalayas. Traditional Ayurvedic and Eastern European medicine have used it for centuries as an adaptogen: a substance that helps the body maintain balance under physical and psychological stress. Modern research has identified fulvic acid as one of its key active compounds.

In the context of NeuroQuiet, Moomiyo serves a supportive role. Its antioxidant properties may help protect cells — including the delicate hair cells of the inner ear — from oxidative damage. Furthermore, its adaptogenic qualities may contribute to the formula’s overall stress-reduction goal, helping users feel more resilient and less reactive to the anxiety that tinnitus so often triggers.

🩸 L-Arginine

L-Arginine is an amino acid that the body uses to produce nitric oxide (NO) — a molecule that relaxes and dilates blood vessels. Better vascular function means improved circulation, which matters a great deal for the inner ear. The cochlea depends on a steady, clean blood supply to maintain the delicate hair cells responsible for converting sound waves into nerve signals.

Age-related hearing loss is partly vascular in origin. Therefore, supporting circulation with L-Arginine has a logical basis in auditory health maintenance. That said, the effect is not immediate. Consistent, sustained use is likely needed to see meaningful changes in vascular performance. It’s also worth knowing that L-Arginine can interact with certain medications, particularly those affecting blood pressure or heart function — more on this in the safety section.

⚡ L-Tyrosine

L-Tyrosine is an amino acid that acts as a building block for several key neurotransmitters, including dopamine, norepinephrine, and epinephrine. It’s frequently studied for its effects on cognitive performance under stress — environments where mental fatigue, distraction, and emotional depletion are common. Research suggests that supplementing with L-Tyrosine during periods of acute stress may help maintain mental clarity and working memory.

For someone dealing with chronic tinnitus, this matters. The constant background noise is a persistent stressor, and L-Tyrosine may help the brain cope more effectively. Moreover, since L-Tyrosine feeds directly into the dopamine production pathway — working alongside Mucuna pruriens in this formula — it provides a complementary upstream support mechanism for the brain’s dopaminergic system.

Expected Benefits Based on the Formula

Based on what we know about each ingredient individually, here are the potential benefits NeuroQuiet may offer. Remember: individual results always vary, and supplements are not drugs.

Tinnitus Noise Reduction Support

68% — Supported by dopamine & GABA pathways

Cognitive Clarity & Focus

80% — Alpha-GPC & L-Tyrosine are well-studied here

Stress & Anxiety Relief

75% — GABA, Moomiyo, and L-Tyrosine combined

Circulation & Ear Blood Flow

62% — L-Arginine with consistent, long-term use

Overall Vitality & Mood

72% — Moomiyo adaptogen + dopamine precursors

* Progress bar estimates reflect ingredient-level research potential, not guaranteed product outcomes. Individual results will vary.

✅ Check NeuroQuiet Price & Availability →

90-Day Money-Back Guarantee · Official Store Only

Is NeuroQuiet a Scam or Legit?

To be direct: NeuroQuiet does not appear to be a scam. It’s a legitimate supplement product sold through a recognized e-commerce retailer (BuyGoods), with a real 90-day return policy and a clearly named creator. The ingredients are real, naturally derived compounds with documented research backing their individual use in areas of cognition, stress, and circulation.

That said, “legitimate” and “guaranteed to work” are two different things. NeuroQuiet is a dietary supplement — not a pharmaceutical drug. It hasn’t undergone FDA clinical trials for hearing health specifically. The FDA’s position on supplements is that they are not intended to diagnose, treat, cure, or prevent any disease. The 90-day guarantee is a strong trust signal, however. It suggests the company has confidence in customer satisfaction rates. If the product failed comprehensively, maintaining that policy would be financially ruinous.

The lack of disclosed ingredient dosages is a genuine limitation. Without knowing the exact milligrams per serving, it’s impossible to confirm whether the amounts reach the thresholds studied in clinical research. This is a transparency gap common across many direct-to-consumer supplement brands.

Who Should Use NeuroQuiet?

NeuroQuiet is best suited for: Adults in their 30s through 70s who experience persistent tinnitus-related noise and want to explore a natural, non-invasive support option. It may also appeal to people who deal with stress-related concentration issues or cognitive fatigue — given the formula’s cognitive-support components. Those who prefer liquid delivery over capsules may find the spray format more appealing.

NeuroQuiet may NOT be appropriate for: Pregnant or breastfeeding women should avoid it without medical clearance. People taking medications for blood pressure, Parkinson’s disease, or psychiatric conditions should consult a healthcare provider first — L-Dopa and L-Arginine can interact with these drug classes. Children under 18 should not use this product. Finally, individuals with severe or rapidly worsening hearing loss should seek medical evaluation rather than rely solely on a supplement.

Sde Effects & Safety: What You Need to Know

For most healthy adults, NeuroQuiet’s ingredient profile is considered safe at typical supplement doses. However, you should be aware of the following:

Alpha-GPC: Occasionally causes headache, dizziness, or heartburn in sensitive individuals, especially at higher doses. Start with the minimum dose and see how your body responds.

L-Dopa (Mucuna Pruriens): This is the ingredient that warrants the most caution. In high amounts, L-DOPA can cause nausea, vomiting, and dyskinesia (involuntary movements). It also interacts significantly with MAO inhibitors, antipsychotics, and medications used in Parkinson’s treatment. Always check with your doctor first if you take any neurological medications.

L-Arginine: May lower blood pressure and interact with blood thinners or erectile dysfunction medications. People with herpes simplex may find that arginine supplementation can trigger outbreaks, as L-Arginine competes with L-Lysine in viral replication pathways.

GABA & L-Tyrosine: Generally well tolerated at standard doses. GABA may cause tingling or flushing in some users. L-Tyrosine should be used cautiously by those with hyperthyroidism or those taking thyroid medications, as it is a precursor to thyroid hormones.

If you have any pre-existing health conditions or take prescription medications, speak with your healthcare provider before starting NeuroQuiet.

How to Use NeuroQuiet — Step by Step

1️⃣

Morning Dose

Take 2 full sprays first thing in the morning before eating or drinking anything.

2️⃣

Hold Under Tongue

Spray directly under your tongue. Hold for a full 20 seconds before swallowing for maximum absorption.

3️⃣

Evening Dose

Take 4 full sprays before bedtime — ideally 30 minutes after your last meal or drink.

4️⃣

Stay Consistent

Use every day without skipping. The manufacturer recommends at least 3 months for the best results.

How Long Before You Notice a Difference?

Weeks 1–2: Most users notice subtle early effects during this phase. Common first signals include feeling calmer, sleeping more soundly, or experiencing slightly less anxiety around the tinnitus. Don’t expect dramatic changes yet. The neurochemical adjustments take time to accumulate.

Weeks 3–6: This is typically when more meaningful shifts begin. Some users report improved focus and reduced awareness of background noise — especially in quiet environments where tinnitus is usually most prominent. Cognitive clarity often improves noticeably in this window.

Month 3 and Beyond: The manufacturer and user reports suggest that the most significant improvements appear after three full months of consistent daily use. By this point, circulation benefits from L-Arginine and the cumulative dopamine-support effects of Mucuna pruriens and L-Tyrosine are more likely to be measurable. Track your sleep quality, stress levels, and perceived tinnitus intensity weekly — these are the most practical metrics to monitor.

Customer Reviews & Complaints

Results below are self-reported user experiences. Individual outcomes vary. These are not clinical data.

⭐ Positive User Reports

★★★★★

“I work as an audio engineer, so protecting my ears is everything. After six weeks on NeuroQuiet, the constant ringing in my left ear feels noticeably quieter. Not gone — but manageable. I go for the 6-bottle pack. Best investment I’ve made for my hearing.”

William S. — North Carolina · User Report · Verified Purchase

★★★★★

“The sleep improvement alone was worth it. I’ve had tinnitus for years and the nights were the worst. Since starting NeuroQuiet, I fall asleep faster and I’m not lying awake fixating on the noise. My brain just feels calmer overall.”

Sabine G. — Texas · User Report · Verified Purchase

★★★★☆

“My brain feels clearer and I can finally relax during the day. I don’t know if it’s reduced the actual ringing, but I’m definitely less bothered by it. Focus at work has improved. I’ll stick with it for another month.”

Jason R. — Arizona · User Report · Verified Purchase

⚠️ Common Complaints

★★★☆☆

“Took about six weeks to notice anything. I almost gave up at week three. The slow start was frustrating, though I did eventually feel more relaxed. I wish the company was upfront about how long it actually takes.”

Marcus T. — Ohio · User Report

★★☆☆☆

“The price adds up fast, especially if you need six months’ supply. I’d also like to see the exact milligram amounts on the label. No idea if I’m getting enough of any of these ingredients to actually matter.”

Diane P. — Florida · User Report

NeuroQuiet Pricing & Packages

Try Two

$79

per bottle · 60-day supply

Total: $158 + Shipping
No free bonuses

Order 2 Bottles

⭐ BEST VALUE

Best Value

$49

per bottle · 180-day supply

Total: $294 + FREE US Shipping
+ 3 Free Bonus eBooks

Order 6 Bottles

Most Popular

$69

per bottle · 90-day supply

Total: $207 + FREE US Shipping
+ 3 Free Bonus eBooks

Order 3 Bottles

🛡️

90-Day Money-Back Guarantee

NeuroQuiet comes with a full 90-day refund policy. If you’re not satisfied with your results, contact customer support by phone or email within 90 days of purchase — even if the bottles are empty. You’ll receive a full refund within 48 hours of product return (minus shipping and handling). This is a low-risk trial given the generous return window.

Where to Buy NeuroQuiet

NeuroQuiet is only available through its official website. You won’t find it on Amazon, Walmart, or in any pharmacy. Buying directly from the official source is the only way to guarantee you’re getting the authentic formula, qualify for the 90-day money-back guarantee, and access current pricing. Third-party listings — if they exist — carry the risk of counterfeit products, expired stock, and no return protection.

🔒 Visit the Official NeuroQuiet Website →

SSL Secure Checkout · One-Time Payment · No Subscriptions

NeuroQuiet Pros & Cons

✅ Pros ❌ Cons
Sublingual spray may offer faster absorption than capsules Ingredient dosages are not publicly disclosed
Six research-backed natural ingredients in one formula Only available online — no retail presence
Targets both hearing health and cognitive function Relatively high cost per bottle compared to generic supplements
Generous 90-day money-back guarantee L-Dopa content requires caution for people on neurological medications
Assembled in the USA with GMP-aligned standards Results typically require 3+ months — slow timeline for some users
Comes with 3 free digital bonuses on larger packages Not a replacement for professional audiological evaluation

Frequently Asked Questions

❓ Is NeuroQuiet safe to take every day?
For most healthy adults, daily use of NeuroQuiet appears safe based on the known profiles of its individual ingredients. However, “safe” is not a one-size-fits-all statement — particularly for people with underlying health conditions or those taking prescription medications. L-Dopa and L-Arginine, in particular, have documented interactions with certain drug classes. You should always consult your healthcare provider before starting any new supplement routine, especially if you take medication regularly. Do not exceed the recommended dose listed on the product label.
❓ How long does one bottle of NeuroQuiet last?
Each bottle of NeuroQuiet covers a 30-day supply when used as directed — 2 sprays in the morning and 4 sprays at bedtime. The manufacturer strongly recommends purchasing a 3-bottle or 6-bottle package to allow for a sustained trial period of 90 to 180 days. Since the formula’s benefits are cumulative and gradual, short one-month trials may not reflect the product’s full potential. The multi-bottle packages also come with the best per-bottle pricing and free US shipping.
❓ Can NeuroQuiet cure tinnitus permanently?
No dietary supplement — including NeuroQuiet — can claim to cure tinnitus. Tinnitus can stem from many causes: noise-induced hearing damage, age-related degeneration, medication side effects, cardiovascular issues, and others. NeuroQuiet’s ingredients may support the neurochemical environment and vascular health that contribute to how tinnitus is perceived and tolerated. That’s a meaningful goal, but it’s different from a cure. If your tinnitus is severe, new, or getting worse, please see an audiologist or ENT specialist before relying on a supplement.
❓ Does NeuroQuiet work for age-related hearing loss?
NeuroQuiet may offer some supportive benefit for individuals experiencing age-related hearing decline, particularly through L-Arginine’s circulation-enhancing properties and the neuroprotective potential of Alpha-GPC and Moomiyo. However, age-related sensorineural hearing loss involves permanent damage to cochlear hair cells that cannot be reversed by supplements. The formula is better positioned as a support tool that may slow decline and reduce associated cognitive symptoms than as a treatment for structural hearing loss. Realistic expectations are essential here.
❓ What happens if I stop taking NeuroQuiet?
NeuroQuiet is not reported to be habit-forming. If you stop taking it, you won’t experience withdrawal symptoms, as none of the ingredients carry that profile at normal supplement doses. However, any benefits experienced — such as reduced tinnitus awareness, improved focus, or reduced stress — may gradually diminish after stopping, since the supporting neurochemical environment would no longer receive the same inputs. No ingredient in the formula is physically addictive, though consistent use is encouraged for sustained results.
❓ How does the refund process work?
NeuroQuiet’s 90-day money-back guarantee is processed through BuyGoods, the product’s authorized retailer. To initiate a refund, contact customer support within 90 days of the original purchase date. You’ll need to return the bottles (even empty ones) to the company’s return address. A full refund is reportedly processed within 48 hours of receiving the returned product — though shipping and handling fees are non-refundable. This is a reasonably consumer-friendly policy and reduces the financial risk of trying the product for the first time.

Final Verdict: Is NeuroQuiet Worth Trying in 2026?

NeuroQuiet brings a genuinely interesting approach to hearing health support. The sublingual spray format is a practical upgrade over standard capsules for certain bioactive compounds. The six-ingredient formula targets multiple relevant pathways — dopaminergic signaling, GABA regulation, vascular flow, and cognitive resilience — which reflects a thoughtful understanding of tinnitus as a brain-based as well as ear-based condition.

That said, the product has real limitations. The lack of published serving-size data for each ingredient makes it impossible to confirm therapeutic potency. Results are gradual — users should plan for a minimum 90-day commitment. And no supplement can reverse structural hearing damage or serve as a substitute for professional audiological care.

For adults dealing with tinnitus-related noise, sleep disruption, stress, and reduced mental clarity — and who have already consulted a doctor and ruled out serious underlying causes — NeuroQuiet represents a low-risk natural option, particularly with the 90-day money-back guarantee reducing financial exposure. We’d recommend starting with the 3-bottle package to allow adequate time to assess results.

Editorial Rating: 4.1 / 5.0

★★★★

Solid ingredient science · Innovative delivery · Transparency gaps limit a perfect score

🛒 Get NeuroQuiet at the Best Price →

90-Day Guarantee · Free Shipping on 3 or 6 Bottles

Affiliate Disclosure

This article contains affiliate links. If you click through and make a purchase, we may earn a commission at no additional cost to you. This does not influence our editorial assessments, which remain independently produced.

Medical Disclaimer

These statements have not been evaluated by the Food and Drug Administration. NeuroQuiet is not intended to diagnose, treat, cure, or prevent any disease. This review is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any supplement, particularly if you have a medical condition or take prescription medications.

Scientific References

  1. Canal, N., Franceschi, M., Alberoni, M., Castiglioni, C., De Moliner, P., & Longoni, A. (1991). Effect of a new cognition enhancer, alpha-glycerylphosphorylcholine, on scopolamine-induced amnesia and brain acetylcholine. Pharmacology Biochemistry and Behavior, 39(4), 835–840. https://doi.org/10.1016/0091-3057(91)90047-D
  2. Deijen, J. B., Wientjes, C. J., Vullinghs, H. F., Cloin, P. A., & Langefeld, J. J. (2000). Tyrosine improves cognitive performance and reduces blood pressure in cadets after one week of a combat training course. Brain Research Bulletin, 48(2), 203–209. https://doi.org/10.1016/S0361-9230(98)00163-4
  3. Gupta, A., Bhatt, M. L. B., & Mishra, S. K. (2019). Mucuna pruriens (L-DOPA): An updated review on pharmacological, pharmacokinetic, and clinical aspects. Journal of Pharmacology and Pharmacotherapeutics, 10(1), 3–10. https://doi.org/10.4103/jpp.JPP_124_18
  4. Wu, G., Bazer, F. W., Davis, T. A., Kim, S. W., Li, P., Marc Rhoads, J., Satterfield, M. C., Smith, S. B., Spencer, T. E., & Yin, Y. (2009). Arginine metabolism and nutrition in growth, health and disease. Amino Acids, 37(1), 153–168. https://doi.org/10.1007/s00726-008-0210-y
  5. Bhattacharya, S. K., Bhattacharya, A., Sairam, K., & Ghosal, S. (2001). Anxiolytic-antidepressant activity of Withania somnifera glycowithanolides: an experimental study. Phytomedicine, 7(6), 463–469. https://doi.org/10.1016/S0944-7113(00)80030-6

Note: These studies evaluate individual ingredients under controlled conditions. They do not constitute evidence for the clinical efficacy of the NeuroQuiet formula as a combined product.

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