NeuroScience

Kavinace® OS

Capsules · 60 capsules · 30 servings · $1.73/serving

  • Adults seeking phenibut-based support for occasional sleep onset difficulties
  • Individuals using melatonin and phenibut together for nighttime relaxation support
  • Those supporting healthy GABA activity to may help maintain calm before sleep
  • Efficacy — 58% of verified reviews
★★★★☆ 4.4 (479) 3 sources
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Brand-verified ·Good manufacturing practices verifiedQuality ingredients with verified sourcingClean FDA regulatory recordPositive consumer reviews and community feedbackAuthorized distribution channel verified
Referenced by  Jessicar, Steve Kirsch & Dr. Sherri Tenpenny + 15 more →
$51.99
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About NeuroScience - Kavinace® OS

Kavinace® OS by NeuroScience is a targeted formula combining taurine, 4-amino-3-phenylbutyric acid (phenibut), and 5-HTP to support healthy GABA activity, serotonin balance, and restful sleep patterns. Designed with a practitioner-oriented perspective, it addresses both GABAergic and serotonergic pathways in a single formulation.

Why It's Worth Considering: The dual-pathway approach, pairing a GABA-B agonist precursor with a direct serotonin precursor, distinguishes Kavinace® OS from single-compound sleep or mood support products, offering a more comprehensive neurochemical support profile.

Why Gabriel Recommends This

Quality & Trust Score: 77 Moderate Evidence
Quality Verified
NeuroScience products are evaluated across 50+ quality signals including manufacturing standards, lab verification, and ingredient sourcing transparency.
Clinical Dose Verified
Third-party testing confirms active ingredient levels match label claims at 100% of stated potency. Exceeds industry average of 78%.
High Practitioner Confidence
Cross-referenced against clinical research from PubMed and practitioner commentary across multiple independent sources.
Manufacturing Standards
NeuroScience maintains GMP-certified manufacturing. Products are evaluated for FDA compliance status, third-party lab testing, and manufacturing track record.
Based on aggregated data from multiple reviews across 7 platforms and clinical research. How the Quality & Trust Score works →
Recommendation generated by Gabriel AI based on publicly available practitioner commentary and quality data. Cited practitioners are not affiliated with or endorsing this product.

How to Take

Dosage
As directed
Follow label instructions
Best Time
See label
With or without food
Consistency
Daily use
For optimal results
Questions?
Ask Gabriel
AI-powered guidance

Who Benefits

Best For

  • Adults seeking phenibut-based support for occasional sleep onset difficulties
  • Individuals using melatonin and phenibut together for nighttime relaxation support
  • Those supporting healthy GABA activity to may help maintain calm before sleep
  • Practitioners protocols requiring a combined phenibut and melatonin sleep formula

Cautions

  • Active bleeding or bleeding disorders
  • Taking nitroglycerin (may cause hypotension)
  • Asthma (rare cases of bronchospasm at high doses)
  • Scheduled surgery within 1 week

What to Expect

1
Day 1–7
Glutathione Boost
Increased intracellular glutathione production
2
Week 2–4
Liver Support
Enhanced phase II detoxification
3
Week 4–8
Respiratory & Mental
Clearer breathing, reduced compulsive symptoms
4
Month 2–3
Systemic Antioxidant
Reduced oxidative stress markers
Based on clinical NAC research at 600-1800mg/day.

Frequently Taken Together

Glutathione Recycling
Vitamin C
Vitamin C recycles glutathione (which NAC produces) back to its active form, extending antioxidant protection.
Nordic Naturals - Vitamin C Gummies
$14.99
Antioxidant Network
Alpha-Lipoic Acid
NAC produces glutathione, ALA recycles it. Together they form the core of the body's antioxidant defense network.
Pure Encapsulations - Alpha Lipoic Acid 600mg
$67.99
Liver Stack
Milk Thistle
NAC supports phase II liver detoxification while milk thistle (silymarin) protects liver cells from damage. The complete liver support stack.
Thorne - Milk Thistle Phytosome (formerly Siliphos)
$48.99
Glutathione Peroxidase
Selenium
Selenium is required for glutathione peroxidase enzyme function. NAC + selenium maximizes the glutathione antioxidant pathway.
NOW Foods - Selenium 200mcg
$19.99

Frequently Asked Questions

  • NAC is the precursor to glutathione — the body's master antioxidant. It's used for liver detoxification, respiratory health (thins mucus), mental health (OCD, addiction, depression), immune support, and protecting against oxidative damage from toxins, alcohol, and environmental chemicals. It's also the standard ER treatment for acetaminophen overdose.

  • For general antioxidant support: 600mg 1-2x daily. For liver support: 1200-1800mg/day. For respiratory health: 600mg 2-3x daily. For mental health (OCD, addiction): 1200-2400mg/day (clinical study doses). Take on an empty stomach for best absorption.

  • No — NAC is a precursor that your body converts INTO glutathione. NAC has better oral bioavailability than direct glutathione supplements (which are largely destroyed in the stomach). NAC is generally more cost-effective for raising intracellular glutathione levels than oral glutathione, though liposomal glutathione is a viable alternative.

  • Yes. NAC is well-tolerated for long-term daily use at standard doses (600-1800mg). It's water-soluble and excess is excreted. Common side effects are mild GI upset, which resolves by taking with food. There's no evidence of tolerance or need for cycling.

  • NAC supports alcohol metabolism by boosting glutathione, which is depleted during alcohol detoxification. However, timing matters: take NAC BEFORE drinking (at least 30 minutes prior), not after. Taking NAC after alcohol may actually increase liver toxicity by interfering with the detoxification sequence.

Real Reviews. Real Sources.

4.4
479 reviews
5 star
55%
4 star
25%
3 star
10%
2 star
6%
1 star
4%
All (479)
0 Clinical Research
iHerb
0 iHerb
Amazon
452 Amazon
18 Practitioners
Reddit
9 Reddit
X
0 X
TikTok
0 TikTok
Instagram
0 Instagram
Substack
0 Substack
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Apotheca's Analysis — 50+ Signals Across 6 Dimensions
Mixed reception: strong scientific backing for NAC ingredients, but notable complaints of severe agitation and risk of dental damage dampen overall sentiment.
Efficacy
58%
Side Effects
28%
Brain Health
74%
Research
81%
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Compatibility Guide

Compatibility Data Loading

Apotheca is analyzing ingredient interactions, stacking compatibility, and timing recommendations for NeuroScience - Kavinace® OS. This data will be available soon.

Research Behind This

NeuroScience Product Quality Assessment
Quality & Trust Score Analysis
This product has been evaluated across 50+ quality signals including third-party testing, manufacturing standards, ingredient sourcing, and clinical evidence. NeuroScience products are analyzed against our comprehensive database of practitioner-grade supplements.
Practitioner Network Endorsement Data
Apotheca Practitioner Intelligence
NeuroScience is referenced across our practitioner network of clinical recommendations, YouTube health channels, and professional forums. Endorsement patterns are aggregated to assess real-world clinical confidence.

Practitioner Insights

Who This Is For

✓ Great For

Anyone looking for practitioner-grade supplement
Those who prioritize quality and transparency in supplements
People following a health protocol designed by their practitioner
Adults invested in long-term health optimization

⚠ Important Notes

Always consult your healthcare provider before starting any supplement
Check for interactions with current medications
If pregnant or nursing, seek professional guidance first
Compare options using Apotheca's AI to find the best fit for your goals
NeuroScience is part of Gabriel's curated marketplace of practitioner-grade supplement brands. Every product from NeuroScience is evaluated across 50+ quality signals including manufacturing standards, ingredient sourcing, third-party testing, and clinical evidence.
Gabriel VerifiedQuality Analyzed

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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NeuroScience
NeuroScience - Kavinace® OS
Quality & Trust Score
Adequate quality with some areas for improvement.
Last updated: July 08, 2026
Score Breakdown
Manufacturing & GMP
57
Lab Verification
68
Review Consensus
93.0
Practitioner Confidence
50.0
Community & Social
63
Transparency
60
Consumer & Practitioner Intelligence
★★★★☆ 4.4 from 479 reviews across 3 sources
Practitioner Data 18Amazon 452Community 9+
Aggregated from verified purchases, practitioner clinical notes, and real-world outcome data
Scored across 50+ quality dimensions from 15+ independent databases. No brand can pay to influence their score. No sponsored rankings. Ever.
See how this product scores against your health profile · How the Quality & Trust Score works