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N-Acetyl L-Cysteine Capsules

N-Acetyl L-Cysteine antioxidant that supports immune function and promotes healthy antioxidant activity.

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N-Acetyl L-Cysteine Capsules

N-Acetyl L-Cysteine antioxidant that supports immune function and promotes healthy antioxidant activity.

(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: 06/16/2026

$16.99

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Benefits

When You'll Notice Effects

Immediate Effects

N-Acetyl L-Cysteine (NAC) is an antioxidant that supports immune function and promotes healthy antioxidant activity. It also supports healthy neurological function.

  • Immune
  • Oxidation
  • Inflammation
  • Neuroprotection

Why ND N-acetyl L-cysteine?

Pharmaceutical grade N-Acetyl L-Cysteine with 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 compound helps maintain glutathione levels, supports respiratory health, and promotes immune function while helping to support a healthy response to 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 supports your body's production of glutathione, a master antioxidant that supports cellular health and healthy immune cell activity to help your system respond effectively to daily challenges.
    • Supports a Healthy Response to Oxidative Stress: By replenishing glutathione stores, NAC helps support healthy oxidative balance throughout your body, protecting cells and supporting healthy aging at the cellular level.
    • Supports a Healthy Inflammatory Response: NAC modulates inflammatory pathways and supports a balanced inflammatory response, helping to promote overall wellness and recovery.
    • Promotes Healthy Neurological Function: This amino acid crosses the blood-brain barrier to support neuronal health, helping protect brain cells while promoting healthy cognitive function and mental clarity.

    NAC also supports respiratory health by thinning mucus and promoting clear breathing pathways. Its ability to support healthy 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 support a healthy response to reactive oxygen species and supports liver support supplements through healthy 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 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 support for mucus viscosity and clearance in healthy respiratory function [2]. Additionally, research suggests NAC supports healthy neurological function 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 [...]: 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.

    LACTOSE FREE
    GLUTEN FREE
  • Frequently asked questions

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

      Yes, NAC combines well with vitamin C and glutathione. It helps replenish the body's natural glutathione stores, while vitamin C supports antioxidant defense through different pathways.

    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 any time of day since it doesn't depend on circadian timing. Morning is popular for all-day antioxidant support, but evening doses work equally well for maintaining glutathione levels.

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

      NAC can provide immediate antioxidant effects, with most people noticing full benefits within 1-2 weeks as glutathione levels stabilize. It works as a rate-limiting precursor for glutathione biosynthesis.

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

      NAC provides cysteine, the rate-limiting amino acid for glutathione synthesis, converting after absorption and combining with glycine and glutamate to form this key antioxidant when stores are depleted by oxidative stress or aging.

    5. What are the benefits of N-Acetyl L-Cysteine?

      NAC supports glutathione production to reduce oxidative stress, promotes respiratory health by breaking down mucus, and provides neuroprotective benefits through neuroinflammation modulation and mitochondrial support.

    6. When to take N-Acetyl L-Cysteine?

      Our N-Acetyl L-Cysteine can be taken at any time of day with or without food. Most people take NAC once daily, making it easy to incorporate into any routine.

    7. How does N-Acetyl L-Cysteine work?

      N-Acetyl L-Cysteine serves as a precursor to glutathione, your body's master antioxidant, helping replenish depleted levels and strengthen natural detoxification pathways. It also functions as a direct antioxidant, neutralizing harmful free radicals and reducing oxidative stress.

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

      Our NAC capsules use pharmaceutical-grade material, tested for purity, potency, and contaminants in our ISO-accredited lab, with a certificate of analysis for every batch.

Trust Through Transparency

Your health matters, which is why we only use the best 3rd party ISO accredited labs and cGMP certified and FDA registered facilities right here in the USA

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N-Acetyl L-Cysteine Capsules

N-Acetyl L-Cysteine Capsules

$16.99