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N-Acetyl L-Cysteine Capsules

N-Acetyl L-Cysteine antioxidant that supports immune function, reduces oxidative stress, and provides neuroprotective benefits.

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N-Acetyl L-Cysteine Capsules

N-Acetyl L-Cysteine antioxidant that supports immune function, reduces oxidative stress, and provides neuroprotective benefits.

(31 Reviews) Write a Review

View All Reviews

Available in multiple forms! Click Here for:
  • Powerful Antioxidant For Immune Support
  • Third-Party Lab Tested Purity
  • 500mg Pharmaceutical Grade NAC
  • Reduces Oxidative Stress Daily

3rd Party Lab Tested & Verified

See Why ND NAC Is The Best

Updated On: 05/05/2026

$16.99

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Benefits

When You'll Notice Effects

Immediate Effects

N-Acetyl L-Cysteine (NAC) is a powerful antioxidant that supports immune function, reduces oxidative stress, and lowers inflammation. It may also offer neuroprotective benefits.

  • Immune Immune
  • Oxidation Oxidation
  • Inflammation Inflammation
  • Neuroprotection Neuroprotection

Why ND N-acetyl L-cysteine?

PHARMACEUTICAL Grade N-Acetyl L-Cysteine HPLC Verified Purity and Potency
test

How To Take

Dose
Dose

500mg (One Capsule)

Timing
Timing

Flexible

How to Take
How to Take

With Or Without Food

Frequency
Frequency

1 Time Daily

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  • About N-Acetyl L-Cysteine Capsules

    N-Acetyl L-Cysteine (NAC) is a stable form of the amino acid L-cysteine that supports your body's natural antioxidant defenses. This powerful compound helps maintain glutathione levels, supports respiratory health, and promotes immune function while helping to reduce oxidative stress throughout the body.

    Our N-Acetyl L-Cysteine Story

    Many people seek reliable ways to support their body's natural detoxification processes and antioxidant systems. While L-cysteine itself is valuable, it's highly unstable and degrades rapidly. NAC offers superior stability and bioavailability, making it the preferred form for supplementation. Our research revealed that quality and purity were major concerns in the NAC market, with many products containing impurities or inconsistent potency.

    Our N-Acetyl L-Cysteine capsules address these quality issues directly. Every batch undergoes rigorous testing at our third-party labs for both purity and identity verification. Strict manufacturing standards and comprehensive testing protocols ensure you receive a consistent, high-quality NAC supplement that supports your cellular health and antioxidant needs without compromise.

    Benefits

    • Supports Immune Function: NAC boosts your body's production of glutathione, a master antioxidant that strengthens cellular health and enhances immune cell activity to help your system respond effectively to daily challenges.
    • Reduces Oxidative Stress: By replenishing glutathione stores, NAC neutralizes harmful free radicals throughout your body, protecting cells from damage and supporting healthy aging at the cellular level.
    • Reduces Inflammation: NAC modulates inflammatory pathways and supports a balanced inflammatory response, helping to reduce excessive inflammation that can impact overall wellness and recovery.
    • Promotes Neuroprotection: This amino acid crosses the blood-brain barrier to support neuronal health, helping protect brain cells from oxidative damage while promoting healthy cognitive function and mental clarity.

    NAC also supports respiratory health by thinning mucus and promoting clear breathing pathways. Its ability to chelate heavy metals and support liver detoxification pathways makes it valuable for enhancing your body's natural cleansing processes and maintaining optimal liver support.

    Quality and Standardization

    • Pharmaceutical-Grade Manufacturing: Our NAC capsules are manufactured in FDA registered, cGMP certified facilities using pharmaceutical-grade standards to ensure consistent potency and quality in every batch.
    • Third-Party Verified Purity: Each lot undergoes comprehensive identity and purity testing by independent ISO accredited laboratories to verify the absence of contaminants and confirm precise active ingredient content.
    • Standardized Potency: Every capsule delivers exactly 500mg of pure N-Acetyl L-Cysteine with no fillers or unnecessary additives, ensuring reliable dosing for optimal anti oxidative stress supplements benefits.
    • Certificate of Analysis Available: We provide complete COA documentation for every production lot, allowing you to verify the exact specifications and testing results of your specific bottle through our third-party labs program.

    Mechanism of Action

    • Glutathione Precursor Support: NAC provides cysteine, a critical building block for glutathione synthesis, helping your cells produce this essential antioxidant more efficiently when levels become depleted from environmental stressors or metabolic demands.
    • Mucolytic Activity: The compound breaks down disulfide bonds in mucus proteins, reducing viscosity and promoting easier clearance of respiratory secretions while supporting healthy lung health support supplements naturally.
    • Cellular Detoxification: By replenishing intracellular glutathione pools, NAC enhances your body's ability to neutralize reactive oxygen species and supports liver support supplements through improved phase II detoxification pathways.
    • Protein Stabilization: The acetyl group in NAC improves stability and bioavailability compared to regular L-cysteine, allowing for better absorption and more sustained support for glutathione production throughout the day.

    Overview of the Science

    Research into NAC's mechanisms of action reveals its multifaceted therapeutic potential through several distinct pathways. Studies demonstrate that NAC functions as both a direct antioxidant and an indirect one by serving as a rate-limiting precursor for glutathione biosynthesis [1]. The compound's ability to break disulfide bonds in mucus proteins has been extensively documented, showing significant improvements in mucus viscosity and clearance in respiratory conditions [2]. Additionally, NAC exhibits neuroprotective properties through its modulation of neuroinflammation and support for mitochondrial function, making it valuable for brain health supplements [3].

    Clinical investigations have revealed NAC's role in cellular detoxification processes extends beyond traditional antioxidant activity. The compound helps maintain healthy levels of various inflammatory markers while supporting the body's natural detoxification pathways in both liver and kidney tissues [4]. Recent research has also highlighted NAC's potential in supporting healthy dopamine signaling and cognitive function, particularly in situations involving oxidative stress or age-related cellular changes [5]. These diverse mechanisms make NAC a valuable addition to comprehensive longevity protocols focused on cellular health optimization.

    [1] Rushworth GF, Megson IL. Existing and potential therapeutic uses for N-acetylcysteine: the need for conversion to intracellular glutathione for antioxidant benefits. Pharmacol Ther. 2014;141(2):150-159.

    [2] Sheffner AL, Medler EM, Jacobs LW, Sarett HP. The in vitro reduction in viscosity of human tracheobronchial secretions by acetylcysteine. Am Rev Respir Dis. 1964;90:721-729.

    [3] Samuni Y, Goldstein S, Dean OM, Berk M. The chemistry and biological activities of N-acetylcysteine. Biochim Biophys Acta. 2013;1830(8):4117-4129.

    [4] Tepel M, van der Giet M, Schwarzfeld C, Laufer U, Liermann D, Zidek W. Prevention of radiographic-contrast-agent-induced reductions in renal function by acetylcysteine. N Engl J Med. 2000;343(3):180-184.

    [5] Dean O, Giorlando F, Berk M. N-acetylcysteine in psychiatry: current therapeutic evidence and potential mechanisms of action. J Psychiatry Neurosci. 2011;36(2):78-86.

    Ingredients

    N-Acetyl L-Cysteine:

    • N-Acetyl-L-Cysteine (NAC)
    • 500mg per capsule
    • Pharmaceutical-grade purity

    Each capsule delivers 500mg of pure N-Acetyl L-Cysteine without fillers, artificial colors, or unnecessary additives. This standardized dosage provides the optimal amount studied in clinical research for supporting cellular health supplements and antioxidant function. The pharmaceutical-grade manufacturing process ensures consistent bioavailability and potency, making it an ideal choice for those seeking reliable daily anti oxidative stress supplements support.

  • Frequently asked questions

    1. Can N-Acetyl L-Cysteine be taken with other antioxidant supplements like vitamin C or glutathione?

      Yes, N-Acetyl L-Cysteine can be safely combined with other antioxidants like vitamin C or glutathione. NAC actually works synergistically with these compounds since it helps replenish your body's natural glutathione stores while vitamin C provides additional antioxidant support through different pathways. Many people find that combining antioxidants creates a more comprehensive approach to supporting their body's natural defense systems.

    2. What's the best time of day to take N-Acetyl L-Cysteine for maximum antioxidant benefits?

      N-Acetyl L-Cysteine can be taken at any time of day since it provides immediate antioxidant effects and doesn't depend on circadian timing for optimal function. Many people prefer taking it in the morning to support their body's natural detoxification processes throughout the day, though evening doses work equally well for maintaining glutathione levels and reducing oxidative stress.

    3. How long does it take for N-Acetyl L-Cysteine to start supporting glutathione levels in the body?

      N-Acetyl L-Cysteine begins supporting glutathione production within hours of consumption, as it serves as a direct precursor that your body can immediately utilize for glutathione synthesis. Most people notice the full antioxidant benefits within 1-2 weeks of consistent daily use, as glutathione levels stabilize and accumulate throughout the body's tissues.

    4. How does N-Acetyl L-Cysteine work as a precursor to glutathione production?

      N-Acetyl L-Cysteine works as a rate-limiting precursor by providing the sulfur-containing amino acid cysteine, which is the bottleneck ingredient your body needs to produce glutathione. Once NAC is absorbed, it's converted to cysteine and then combined with glycine and glutamate to form glutathione, your body's master antioxidant. This process helps maintain optimal glutathione levels, especially when your natural stores become depleted due to oxidative stress or aging.

    5. What are the benefits of n acetyl cysteine?

      N-Acetyl L-Cysteine supports your body's natural antioxidant defenses by helping maintain glutathione levels, which reduces oxidative stress throughout the body. It promotes immune function and respiratory health by breaking down mucus proteins, improving clearance in the respiratory system. NAC also provides neuroprotective benefits through its modulation of neuroinflammation and support for mitochondrial function.

    6. When to take n acetyl cysteine?

      Our N-Acetyl L-Cysteine can be taken at any time of day since it has flexible dosing timing. Most people take NAC once daily with or without food, making it easy to incorporate into any routine. The supplement provides immediate effects, so you can take it whenever is most convenient for your schedule.

    7. How does n acetyl cysteine work?

      N-Acetyl L-Cysteine works by serving as a precursor to glutathione, your body's master antioxidant, helping to replenish depleted levels and strengthen natural detoxification pathways. It also functions as a direct antioxidant itself, neutralizing harmful free radicals and reducing oxidative stress throughout the body. Additionally, NAC breaks disulfide bonds in mucus proteins, helping to thin and clear respiratory secretions while supporting healthy lung function.

    8. Why choose Nootropics Depot's N-Acetyl L-Cysteine capsules over other NAC supplements on the market?

      Our N-Acetyl L-Cysteine capsules use pharmaceutical-grade NAC that we rigorously test for purity, potency, and contaminants in our ISO-accredited laboratory. We provide complete certificates of analysis for every batch, ensuring you receive exactly what's on the label without fillers or adulterants. Unlike many NAC supplements that use lower-grade material or skip third-party testing, we maintain the highest manufacturing standards to deliver consistent, reliable results you can trust.

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N-Acetyl L-Cysteine Capsules

N-Acetyl L-Cysteine Capsules

$16.99