Overview

SCIENTIFIC SCORE
Possibly Effective
Based on 4 Researches
7.5
USERS' SCORE
Good
Based on 4 Reviews
8.6
Supplement Facts
Serving Size: 1 Capsule
Amount Per Serving
%DV
N-acetyl-L-cysteine
600 mg
**

Top Medical Research Studies

9
NAC protects lungs from damage
We examined how N-acetyl-L-cysteine (NAC) impacts lung health in the context of chronic obstructive pulmonary disease (COPD) by exposing rats to cigarette smoke (CS) over a four-week period. This study set up a model of lung injury to assess the damage caused by CS and the protective effects of NAC.

After exposure, we observed significant changes in the lung tissue, including widening of the alveolar walls and increased inflammatory cell infiltration, suggesting serious oxidative injury. We found that NAC treatment helped counteract some of the harmful effects, reducing markers of oxidative stress like malondialdehyde while boosting protective enzymes such as superoxide dismutase.

Additionally, we noted that in lung cells exposed to cigarette smoke, NAC also mitigated apoptosis, which is a form of programmed cell death induced by oxidative stress. This underscores the potential for NAC as a therapeutic agent to replenish the body’s glutathione and aid in protecting lung health amidst the damaging effects of smoking.

Overall, our findings point to NAC's beneficial role in shielding lung tissues from damage due to cigarette smoke, reinforcing its use as an antioxidant in managing COPD.
Read More
We explored the role of mucus hypersecretion in chronic obstructive pulmonary disease (COPD), which is a common trait tied to worse health outcomes. Notably, this mucus issue can sometimes arise before any noticeable airway obstruction, prompting us to consider early interventions as a way to prevent further complications.

Our review delved into the effectiveness of N-acetylcysteine (NAC), a treatment that shows promise in improving mucus clearance and reducing harmful protein expressions related to mucus. NAC operates through antioxidant mechanisms, both directly and indirectly, and it intervenes in inflammation by targeting specific pathways in airway cells. It helps inhibit certain factors responsible for inflammation and can lower levels of certain harmful cytokines.

Through various clinical experiences, it appears that using NAC as an add-on therapy can help alleviate symptoms and enhance the overall well-being of COPD patients. Thus, we conclude that NAC may serve as a worthy candidate for the early treatment of individuals at risk of developing COPD.
Read More
7
NAC's effect in COPD treatment
We set out to understand the impact of N-acetyl-L-cysteine (NAC) on chronic obstructive pulmonary disease (COPD) by examining its effects in a study involving COPD mice. These mice were divided into groups, where some received NAC while others were given a combination treatment known as ECC-BYF III. The aim was to uncover whether NAC could provide significant therapeutic benefits alongside ECC-BYF III in improving mitochondrial function and overall respiratory health.

Over a period of eight weeks, the research focused on various aspects, including lung function, inflammation levels, and mitochondrial behavior in the mice. While we saw significant improvements in those treated with the ECC-BYF III combination, the isolated effects of NAC were less clear, resulting in a more complicated interpretation of its effectiveness alone in combating COPD.

Ultimately, our findings suggest that while NAC might play a role in a broader treatment strategy, it's particularly the combination with ECC-BYF III that demonstrates notable protective benefits against mitochondrial dysfunction in COPD mice. This study enriches our understanding of how various treatments can work together for better health outcomes in individuals suffering from this debilitating condition.
Read More

Most Useful Reviews

8.8
Avoids Exacerbations
I have been using this NAC for several years and remain satisfied. It is a cost-effective analogue to pharmaceutical preparations containing the same active ingredient. NAC proves useful for chronic obstructive pulmonary disease, acting on the bronchial tube lining. I take it during winter at a dosage of 1000-1200 mg daily to prevent severe exacerbations of the disease, especially in an elderly relative with Parkinson's disease.
Read More
9
Improves Lung Function
NAC possesses antioxidant and expectorant properties, improving lung function, reducing mucus, and facilitating its expulsion from the lungs. It alleviates symptoms of bronchitis and chronic obstructive pulmonary disease. Additionally, it participates in the synthesis of glutathione and regulates glutamate levels.
Read More
8.8
Helpful for COPD
This is not my first purchase of NAC, as it is a cost-effective alternative to pharmaceutical products with the same active ingredient. NAC is beneficial for chronic obstructive pulmonary disease, aiding antioxidant processes in the brain due to its role as a precursor to glutathione. I highly recommend buying this product.
Read More

Medical Researches

SCIENTIFIC SCORE
Possibly Effective
Based on 4 Researches
7.5
  • All Researches
9
NAC protects lungs from damage
We examined how N-acetyl-L-cysteine (NAC) impacts lung health in the context of chronic obstructive pulmonary disease (COPD) by exposing rats to cigarette smoke (CS) over a four-week period. This study set up a model of lung injury to assess the damage caused by CS and the protective effects of NAC.

After exposure, we observed significant changes in the lung tissue, including widening of the alveolar walls and increased inflammatory cell infiltration, suggesting serious oxidative injury. We found that NAC treatment helped counteract some of the harmful effects, reducing markers of oxidative stress like malondialdehyde while boosting protective enzymes such as superoxide dismutase.

Additionally, we noted that in lung cells exposed to cigarette smoke, NAC also mitigated apoptosis, which is a form of programmed cell death induced by oxidative stress. This underscores the potential for NAC as a therapeutic agent to replenish the body’s glutathione and aid in protecting lung health amidst the damaging effects of smoking.

Overall, our findings point to NAC's beneficial role in shielding lung tissues from damage due to cigarette smoke, reinforcing its use as an antioxidant in managing COPD.
Read More
7
NAC's effect in COPD treatment
We set out to understand the impact of N-acetyl-L-cysteine (NAC) on chronic obstructive pulmonary disease (COPD) by examining its effects in a study involving COPD mice. These mice were divided into groups, where some received NAC while others were given a combination treatment known as ECC-BYF III. The aim was to uncover whether NAC could provide significant therapeutic benefits alongside ECC-BYF III in improving mitochondrial function and overall respiratory health.

Over a period of eight weeks, the research focused on various aspects, including lung function, inflammation levels, and mitochondrial behavior in the mice. While we saw significant improvements in those treated with the ECC-BYF III combination, the isolated effects of NAC were less clear, resulting in a more complicated interpretation of its effectiveness alone in combating COPD.

Ultimately, our findings suggest that while NAC might play a role in a broader treatment strategy, it's particularly the combination with ECC-BYF III that demonstrates notable protective benefits against mitochondrial dysfunction in COPD mice. This study enriches our understanding of how various treatments can work together for better health outcomes in individuals suffering from this debilitating condition.
Read More
We explored the role of mucus hypersecretion in chronic obstructive pulmonary disease (COPD), which is a common trait tied to worse health outcomes. Notably, this mucus issue can sometimes arise before any noticeable airway obstruction, prompting us to consider early interventions as a way to prevent further complications.

Our review delved into the effectiveness of N-acetylcysteine (NAC), a treatment that shows promise in improving mucus clearance and reducing harmful protein expressions related to mucus. NAC operates through antioxidant mechanisms, both directly and indirectly, and it intervenes in inflammation by targeting specific pathways in airway cells. It helps inhibit certain factors responsible for inflammation and can lower levels of certain harmful cytokines.

Through various clinical experiences, it appears that using NAC as an add-on therapy can help alleviate symptoms and enhance the overall well-being of COPD patients. Thus, we conclude that NAC may serve as a worthy candidate for the early treatment of individuals at risk of developing COPD.
Read More
We explored how n-acetyl-l-cysteine (NAC) affects human lung fibroblasts (hLFs) when exposed to cigarette smoke extract (CSE), which is known to contribute to chronic obstructive pulmonary disease (COPD). In our investigation, we discovered that CSE activates certain caspases and promotes oxidative stress within the cells, leading to decreased levels of important extracellular matrix proteins such as collagen Iα1 and fibronectin.

Importantly, we observed that treating the lung fibroblasts with NAC helped counteract these negative effects. NAC was effective in reducing oxidative stress, thereby inhibiting the activation of caspases that contribute to the degradation of the extracellular matrix. This restoration of collagen and fibronectin levels suggests a potential positive role for NAC in maintaining lung tissue integrity during cigarette smoke exposure.

Our findings support the notion that NAC could be a valuable therapeutic approach in mitigating some of the damaging effects associated with smoking-related lung diseases. While further research is warranted to fully understand the implications, we believe that targeting oxidative stress with NAC could offer a hopeful pathway for improving outcomes in individuals suffering from COPD.
Read More

User Reviews

USERS' SCORE
Good
Based on 4 Reviews
8.6
  • All Reviews
  • Positive Reviews
  • Negative Reviews
8.8
Avoids Exacerbations
I have been using this NAC for several years and remain satisfied. It is a cost-effective analogue to pharmaceutical preparations containing the same active ingredient. NAC proves useful for chronic obstructive pulmonary disease, acting on the bronchial tube lining. I take it during winter at a dosage of 1000-1200 mg daily to prevent severe exacerbations of the disease, especially in an elderly relative with Parkinson's disease.
Read More
9
Improves Lung Function
NAC possesses antioxidant and expectorant properties, improving lung function, reducing mucus, and facilitating its expulsion from the lungs. It alleviates symptoms of bronchitis and chronic obstructive pulmonary disease. Additionally, it participates in the synthesis of glutathione and regulates glutamate levels.
Read More
8.8
Helpful for COPD
This is not my first purchase of NAC, as it is a cost-effective alternative to pharmaceutical products with the same active ingredient. NAC is beneficial for chronic obstructive pulmonary disease, aiding antioxidant processes in the brain due to its role as a precursor to glutathione. I highly recommend buying this product.
Read More
8.8
Mucus Relief
NAC is beneficial for all lung and respiratory diseases, especially chronic bronchitis and chronic obstructive pulmonary disease. It is believed to assist with acute respiratory diseases and emphysema. Initially, I observed that mucus was being expelled from the lungs, bronchi, and nose. Overall, I am satisfied with the results from this dietary supplement.
Read More

Frequently Asked Questions

Chronic Obstructive Pulmonary Disease (COPD) is a progressive lung disease that makes it difficult to breathe. It is characterized by long-term airflow limitation and is commonly caused by long-term exposure to irritating gases or particulate matter, most often from cigarette smoke. Symptoms include chronic cough, wheezing, shortness of breath, and chest tightness. People with COPD may also experience frequent respiratory infections and bouts of exacerbation, where symptoms worsen significantly for a short period.

COPD encompasses two primary conditions: emphysema, which involves the destruction of air sacs in the lungs, and chronic bronchitis, which is the inflammation and narrowing of the bronchial tubes that leads to excessive mucus production. While there is no cure for COPD, various treatments are available to help manage symptoms and improve quality of life. These can include bronchodilators, corticosteroids, pulmonary rehabilitation, and lifestyle changes such as quitting smoking. Early diagnosis and intervention can significantly impact the progression of the disease and increase overall well-being for those affected.

N-Acetyl Cysteine (NAC) is a modified form of the amino acid cysteine, known for its role as a powerful antioxidant and mucolytic agent. It has been widely used as a dietary supplement for various health benefits, including supporting respiratory health, detoxification, and enhancing overall immune function. NAC is particularly recognized for its ability to replenish glutathione, one of the body's most important antioxidants, which helps combat oxidative stress and protect cells from damage.

In addition to its antioxidant properties, N-Acetyl Cysteine is commonly leveraged in a clinical setting for its effectiveness in treating acetaminophen (Tylenol) overdoses, as it aids in restoring depleted glutathione levels, thus preventing liver damage. It can also be beneficial for individuals with chronic respiratory conditions, such as COPD or cystic fibrosis, as it helps in thinning mucus, making it easier to expel. While NAC is generally considered safe for most people, it’s important to consult a healthcare professional before starting any new supplement, particularly for those with pre-existing conditions or those already on medication.

Based on user reviews, the time it takes to see results from NAC (N-acetylcysteine) for Chronic Obstructive Pulmonary Disease (COPD) can vary, but many users report witnessing noticeable improvements in lung function and mucus expulsion relatively quickly. One reviewer noted that after starting NAC, they observed mucus being expelled from the lungs, bronchi, and nose shortly after beginning the supplement (Read Review).

Other users mentioned the long-term benefits of taking NAC consistently, as it plays a role in antioxidant processes and supports respiratory health over time. For instance, one user highlighted its effectiveness in preventing severe exacerbations during winter, suggesting they have had sustained benefits from regular use (Read Review). While individual experiences may differ, many users recognize NAC as a potentially valuable addition to their management of COPD.

N-acetyl-L-cysteine (NAC) shows promise as a supportive therapy for chronic obstructive pulmonary disease (COPD), as evidenced by several scientific studies. For instance, research indicates that NAC can protect lung tissue from damage caused by cigarette smoke by reducing oxidative stress and inflammation in lung cells. The treatment was found to counteract markers of oxidative injury while promoting protective enzymes, suggesting that NAC may help in shielding lung health amidst the challenges associated with smoking-related conditions [1].

Furthermore, NAC has been posited as a potential early intervention for COPD, aiding in mucus clearance and reducing harmful inflammatory responses within the airways. Its antioxidant properties may contribute significantly to improving the overall well-being of COPD patients when used as an adjunct therapy [3]. Although some studies indicate that NAC's effectiveness may be enhanced when combined with other treatments, its individual contributions to managing COPD symptoms are noteworthy, hinting that it could be a valuable addition to therapeutic strategies aimed at this chronic condition [2].

Based on user reviews, many individuals report significant improvements in respiratory symptoms after using NAC (N-acetylcysteine). Users have noted enhanced lung function and decreased mucus production, which facilitates easier expulsion from the lungs, particularly beneficial for those struggling with chronic obstructive pulmonary disease (COPD) and bronchitis (Read Review). One reviewer specifically mentioned a noticeable increase in mucus expulsion shortly after starting the supplement, reinforcing the positive effects on respiratory health (Read Review).

Additionally, long-term users have shared that consistent use of NAC can help prevent severe exacerbations, particularly during the winter months, demonstrating its potential as a preventive measure for those with chronic respiratory conditions (Read Review). While these experiences highlight NAC as a promising supplement for lung health, individual results may vary, and potential users should consider discussing it with a healthcare provider to ensure it aligns with their treatment plan.

Users have reported positive experiences when combining NAC (N-acetylcysteine) with other supplements for managing Chronic Obstructive Pulmonary Disease (COPD). Many individuals highlight its effectiveness in improving lung function and reducing mucus buildup, which can be particularly beneficial for those suffering from chronic bronchitis and other respiratory issues. One user noted that while taking NAC, they observed increased mucus expulsion shortly after starting the supplement, indicating its potent expectorant properties (Read Review).

Furthermore, long-term users have shared how they integrate NAC into their overall health regimen, using it alongside other therapies to maintain respiratory health. They report that consistent use, especially during winter months, helps in preventing severe exacerbations linked to COPD (Read Review). As a precursor to glutathione, NAC's antioxidant effects also allow it to support overall well-being, making it a valuable addition for those managing chronic respiratory conditions (Read Review). While many users find it effective, it's advisable to consult with a healthcare professional before adding any new supplements to ensure safety and compatibility with existing treatments.

Users report that the ideal dose of N Acetyl Cysteine (NAC) for treating Chronic Obstructive Pulmonary Disease (COPD) typically ranges from 1000 to 1200 mg daily. One user shares their personal experience, stating, "I take it during winter at a dosage of 1000-1200 mg daily to prevent severe exacerbations of the disease" (Read Review). This dosage appears to be particularly effective, especially for individuals with complicating factors, such as elderly relatives with additional health issues like Parkinson's disease.

In addition to specific dosage recommendations, users emphasize the overall benefits of NAC for lung health. Its antioxidant and expectorant properties seem to play a vital role in improving lung function and reducing mucus buildup, factors crucial for those suffering from COPD (Read Review). With several users endorsing its effectiveness, NAC appears to be a valuable dietary supplement in managing the symptoms of chronic lung conditions.

8.8
Mucus Relief
NAC is beneficial for all lung and respiratory diseases, especially chronic bronchitis and chronic obstructive pulmonary disease. It is believed to assist with acute respiratory diseases and emphysema. Initially, I observed that mucus was being expelled from the lungs, bronchi, and nose. Overall, I am satisfied with the results from this dietary supplement.
8.8
Avoids Exacerbations
I have been using this NAC for several years and remain satisfied. It is a cost-effective analogue to pharmaceutical preparations containing the same active ingredient. NAC proves useful for chronic obstructive pulmonary disease, acting on the bronchial tube lining. I take it during winter at a dosage of 1000-1200 mg daily to prevent severe exacerbations of the disease, especially in an elderly relative with Parkinson's disease.
9
Improves Lung Function
NAC possesses antioxidant and expectorant properties, improving lung function, reducing mucus, and facilitating its expulsion from the lungs. It alleviates symptoms of bronchitis and chronic obstructive pulmonary disease. Additionally, it participates in the synthesis of glutathione and regulates glutamate levels.
8.8
Helpful for COPD
This is not my first purchase of NAC, as it is a cost-effective alternative to pharmaceutical products with the same active ingredient. NAC is beneficial for chronic obstructive pulmonary disease, aiding antioxidant processes in the brain due to its role as a precursor to glutathione. I highly recommend buying this product.
9
NAC protects lungs from damage
We examined how N-acetyl-L-cysteine (NAC) impacts lung health in the context of chronic obstructive pulmonary disease (COPD) by exposing rats to cigarette smoke (CS) over a four-week period. This study set up a model of lung injury to assess the damage caused by CS and the protective effects of NAC.

After exposure, we observed significant changes in the lung tissue, including widening of the alveolar walls and increased inflammatory cell infiltration, suggesting serious oxidative injury. We found that NAC treatment helped counteract some of the harmful effects, reducing markers of oxidative stress like malondialdehyde while boosting protective enzymes such as superoxide dismutase.

Additionally, we noted that in lung cells exposed to cigarette smoke, NAC also mitigated apoptosis, which is a form of programmed cell death induced by oxidative stress. This underscores the potential for NAC as a therapeutic agent to replenish the body’s glutathione and aid in protecting lung health amidst the damaging effects of smoking.

Overall, our findings point to NAC's beneficial role in shielding lung tissues from damage due to cigarette smoke, reinforcing its use as an antioxidant in managing COPD.
We explored the role of mucus hypersecretion in chronic obstructive pulmonary disease (COPD), which is a common trait tied to worse health outcomes. Notably, this mucus issue can sometimes arise before any noticeable airway obstruction, prompting us to consider early interventions as a way to prevent further complications.

Our review delved into the effectiveness of N-acetylcysteine (NAC), a treatment that shows promise in improving mucus clearance and reducing harmful protein expressions related to mucus. NAC operates through antioxidant mechanisms, both directly and indirectly, and it intervenes in inflammation by targeting specific pathways in airway cells. It helps inhibit certain factors responsible for inflammation and can lower levels of certain harmful cytokines.

Through various clinical experiences, it appears that using NAC as an add-on therapy can help alleviate symptoms and enhance the overall well-being of COPD patients. Thus, we conclude that NAC may serve as a worthy candidate for the early treatment of individuals at risk of developing COPD.
7
NAC's effect in COPD treatment
We set out to understand the impact of N-acetyl-L-cysteine (NAC) on chronic obstructive pulmonary disease (COPD) by examining its effects in a study involving COPD mice. These mice were divided into groups, where some received NAC while others were given a combination treatment known as ECC-BYF III. The aim was to uncover whether NAC could provide significant therapeutic benefits alongside ECC-BYF III in improving mitochondrial function and overall respiratory health.

Over a period of eight weeks, the research focused on various aspects, including lung function, inflammation levels, and mitochondrial behavior in the mice. While we saw significant improvements in those treated with the ECC-BYF III combination, the isolated effects of NAC were less clear, resulting in a more complicated interpretation of its effectiveness alone in combating COPD.

Ultimately, our findings suggest that while NAC might play a role in a broader treatment strategy, it's particularly the combination with ECC-BYF III that demonstrates notable protective benefits against mitochondrial dysfunction in COPD mice. This study enriches our understanding of how various treatments can work together for better health outcomes in individuals suffering from this debilitating condition.

References

  1. Chen J, Cheng Y, Cui H, Li S, Duan L, et al. N‑acetyl‑L‑cysteine protects rat lungs and RLE‑6TN cells from cigarette smoke‑induced oxidative stress. Mol Med Rep. 2025;31. doi:10.3892/mmr.2025.13462
  2. Song M, Han M, Zhang H, Yang Y, Tian Y, et al. The Effective Compound Combination of Bufei Yishen Formula III Improves the Mitochondrial Dysfunction via Inhibiting JNK/Sab Pathway in COPD Mice. Drug Des Devel Ther. 2025;19:525. doi:10.2147/DDDT.S487074
  3. Baraldi F, Bigoni T, Foschino Barbaro MP, Micheletto C, Scioscia G, et al. Mucus production and chronic obstructive pulmonary disease, a possible treatment target: zooming in on N-acetylcysteine. Monaldi Arch Chest Dis. 2025. doi:10.4081/monaldi.2025.3159
  4. La Mensa A, Buscetta M, Woldhuis RR, Cimino M, Giuffrè MR, et al. Caspase inhibition restores collagen Iα1 and fibronectin release in cigarette smoke extract-exposed human lung fibroblasts. Am J Physiol Lung Cell Mol Physiol. 2025;328:L239. doi:10.1152/ajplung.00214.2024
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