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NAC Capsules (600mg)
Supports cellular protection, natural detoxification, and immune function. It is also gaining attention for its role in women's health, including PMOS, hormonal balance, and insulin sensitivity.
- Supports glutathione production – one of the body's most powerful antioxidants
- Helps support the liver’s natural detoxification function
- Relevant to women's health, including PMOS, endometriosis, hormonal balance, and insulin sensitivity
- Helps reduce oxidative stress and supports the body at the cellular level
- Supports immune function and helps fight inflammation
- Ideal during periods of stress, intense training, or poor sleep
- Being studied for its role in mental and emotional well-being
What are the benefits?
With Women's Best NAC Capsules, we have developed a product designed to protect your body at a cellular level, reduce oxidative stress, support the liver's natural detoxification processes, strengthen immune function, and specifically support female hormonal health.
NAC, short for N-Acetyl Cysteine, is a modified form of the amino acid L-cysteine and one of the most extensively researched compounds in the field of dietary supplements. It is the most direct and bioavailable precursor to glutathione, one of the body's most powerful antioxidants. While cysteine from food sources is only partially absorbed, NAC is efficiently transported into cells, where it is readily used for glutathione synthesis.
Glutathione – the foundation of antioxidant protection and natural detoxification.Glutathione can be thought of as the body's primary cellular defense system. It helps neutralize free radicals, reduce oxidative stress, and protect cells from damage that may contribute to aging and degenerative conditions over time. During periods of increased physical or mental strain, such as stress, inflammation, intense exercise, lack of sleep, or environmental exposure, glutathione levels can decline rapidly. NAC can help replenish these natural stores and support the body's ability to cope with these challenges.
What can NAC do in the body? An evidence-based overview.With more than 180 clinical studies, NAC is one of the most thoroughly researched ingredients in the areas of cellular protection and metabolic health. Research suggests that NAC may provide benefits on multiple levels. It supports glutathione production in the liver, promotes the body's natural detoxification processes, and may assist in the elimination of heavy metals such as lead, mercury, and cadmium. Through its anti-inflammatory properties, it may help reduce inflammatory markers such as TNF-α and support immune function. In the area of respiratory health, a meta-analysis of 13 studies involving more than 4,000 COPD patients found that high-dose NAC reduced the risk of disease flare-ups by up to 25%.
NAC may also be particularly relevant for women. Studies suggest that NAC may help improve insulin sensitivity, reduce inflammatory markers, and positively influence androgen levels in individuals with PMOS. Because oxidative stress is closely linked to hormonal imbalances, NAC may also provide support in this area through its role as a precursor to glutathione. Early research has also shown promising results suggesting that NAC may help reduce symptoms associated with endometriosis, positively influence tissue health, and support fertility.
Beyond these benefits, NAC is increasingly being studied in the fields of longevity and mental health. A pilot study in older adults found that NAC may help reduce oxidative stress and DNA damage, improve insulin sensitivity, and support mitochondrial function. Increased glutathione levels in the brain, which NAC may help promote, are also associated with improved mental resilience and cognitive function.
Women's Best NAC Capsules are ideal for anyone looking to support their body from within—whether for protection against oxidative stress, liver support, immune health, cellular health and recovery, or female hormonal health related to PMOS and endometriosis. At the same time, NAC continues to be extensively researched, and current findings surrounding its broad potential, from antioxidant protection and cellular health to mental well-being and stress management, remain highly promising.
Samuni, Y., Goldstein, S., Dean, O. M., & Berk, M. (2013). The chemistry and biological activities of N-acetylcysteine. Biochimica et Biophysica Acta (BBA)-General Subjects, 1830(8), 4117-4129.
Atkuri, K. R., Mantovani, J. J., Herzenberg, L. A., & Herzenberg, L. A. (2007). N-Acetylcysteine—a safe antidote for cysteine/glutathione deficiency. Current opinion in pharmacology, 7(4), 355-359.
Flora, S. J., & Pachauri, V. (2010). Chelation in metal intoxication. International journal of environmental research and public health, 7(7), 2745-2788.
Zhang, Q., Ju, Y., Ma, Y., & Wang, T. (2018). N-acetylcysteine improves oxidative stress and inflammatory response in patients with community acquired pneumonia: A randomized controlled trial. Medicine, 97(45), e13087.
Cazzola, M., Calzetta, L., Page, C., Jardim, J., Chuchalin, A. G., Rogliani, P., & Matera, M. G. (2015). Influence of N-acetylcysteine on chronic bronchitis or COPD exacerbations: a meta-analysis. European Respiratory Review, 24(137), 451-461.
Slattery, J., Kumar, N., Delhey, L., Berk, M., Dean, O., Spielholz, C., & Frye, R. (2015). Clinical trials of N-acetylcysteine in psychiatry and neurology: a systematic review. Neuroscience & Biobehavioral Reviews, 55, 294-321.
Oner, G., & Muderris, I. I. (2011). Clinical, endocrine and metabolic effects of metformin vs N-acetyl-cysteine in women with polycystic ovary syndrome. European Journal of Obstetrics & Gynecology and Reproductive Biology, 159(1), 127-131.
Porpora, M. G., Brunelli, R., Costa, G., Imperiale, L., Krasnowska, E. K., Lundeberg, T., ... & Parasassi, T. (2013). A promise in the treatment of endometriosis: an observational cohort study on ovarian endometrioma reduction by N-acetylcysteine. Evidence-Based Complementary and Alternative Medicine, 2013(1), 240702.
Ooi, S. L., Green, R., & Pak, S. C. (2018). N-acetylcysteine for the treatment of psychiatric disorders: A review of current evidence. BioMed Research International, 2018(1), 2469486.
How do I take it?
Take 1 capsule daily with a meal.
Note: NAC may affect the absorption of certain minerals such as zinc, selenium, or magnesium. Therefore, we recommend leaving a 2–3 hour gap between intakes. If you have asthma or histamine intolerance, consult a healthcare professional before use, as NAC may potentially worsen existing symptoms.
Ingredients
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The natural detox power of NAC.
The liver is the body’s central detoxification organ and works daily to break down toxins, environmental pollutants, and metabolic waste products. It naturally contains high concentrations of glutathione, as it is continuously involved in detoxification processes. However, during periods of high demand, these stores can quickly decline, which may impair the liver’s protective function.
As a direct precursor to glutathione, NAC may help replenish these stores, neutralize free radicals, reduce oxidative stress, and protect liver cells from damage. The clinical relevance of NAC for liver health is also demonstrated by its use in emergency medicine as the standard antidote for liver damage caused by paracetamol (acetaminophen) overdose.
Muriel, P. (2009). Role of free radicals in liver diseases. Hepatology international, 3(4), 526-536.
De Vries, N., & De Flora, S. (1993). N‐acetyl‐l‐cysteine. Journal of cellular biochemistry, 53(S17F), 270-277.
Prescott, L. F., Ballantyne, A., Proudfoot, A. T., Park, J., & Adriaenssens, P. (1977). Treatment of paracetamol (acetaminophen) poisoning with N-acetylcysteine. The Lancet, 310(8035), 432-434.
600 mg of pure NAC.
3× less likely to develop flu symptoms.
A double-blind study with 262 patients showed that NAC may help support the immune system. Over a period of 6 months, only 25% of infected patients in the NAC group developed flu symptoms, compared to 79% in the placebo group. This significant difference is attributed to NAC’s antioxidant and anti-inflammatory properties, which may support the immune system’s natural defense response.
De Flora, S., Grassi, C., & Carati, L. (1997). Attenuation of influenza-like symptomatology and improvement of cell-mediated immunity with long-term N-acetylcysteine treatment. European Respiratory Journal, 10(7), 1535-1541.
NAC and PMOS: insulin sensitivity, cycle, and hormonal balance.
NAC is increasingly being studied in relation to female hormonal health, particularly in PMOS (formerly PCOS). A randomized, double-blind study in women with PMOS showed significant metabolic improvements after 24 weeks of NAC treatment. In addition, NAC was shown to improve ovulation regularity and increase the likelihood of pregnancy.
Studies also suggest that NAC may improve insulin sensitivity, reduce inflammatory markers, and, in some cases, lower androgen levels. Because oxidative stress plays a key role in hormonal imbalances, NAC, as a glutathione precursor, may also provide support at this level by helping to reduce inflammatory processes that can contribute to typical PMOS symptoms such as hormonal acne.
Oner, G., & Muderris, I. I. (2011). Clinical, endocrine and metabolic effects of metformin vs N-acetyl-cysteine in women with polycystic ovary syndrome. European Journal of Obstetrics & Gynecology and Reproductive Biology, 159(1), 127-131.
Asl, Z. S., Parastouei, K., & Eskandari, E. (2023). The effects of N-acetylcysteine on ovulation and sex hormones profile in women with polycystic ovary syndrome: a systematic review and meta-analysis. British Journal of Nutrition, 130(2), 202-210.
Mental health at a cellular level.
NAC is increasingly being studied in the context of mental health. Research suggests that it may help increase glutathione levels in the brain and support the glutamate system, two mechanisms that play an important role in mood, attention, and emotional reactivity. Studies indicate that NAC may support emotional well-being and contribute to mental resilience, with initial effects typically observed within 2 to 6 weeks.
Berk, M., Copolov, D., Dean, O., Lu, K., Jeavons, S., Schapkaitz, I., ... & Bush, A. I. (2008). N-acetyl cysteine as a glutathione precursor for schizophrenia—a double-blind, randomized, placebo-controlled trial. Biological psychiatry, 64(5), 361-368.
Berk, M., Dean, O., Cotton, S. M., Gama, C. S., Kapczinski, F., Fernandes, B. S., ... & Malhi, G. S. (2011). The efficacy of N-acetylcysteine as an adjunctive treatment in bipolar depression: an open label trial. Journal of affective disorders, 135(1-3), 389-394.
Slattery, J., Kumar, N., Delhey, L., Berk, M., Dean, O., Spielholz, C., & Frye, R. (2015). Clinical trials of N-acetylcysteine in psychiatry and neurology: a systematic review. Neuroscience & Biobehavioral Reviews, 55, 294-321.
Fewer inflammatory flare-ups with NAC.
Chronic inflammatory bowel diseases, such as ulcerative colitis, are characterized by recurring flare-ups of inflammation. Since oxidative stress plays a central role, NAC is increasingly being considered as a supportive compound. A randomized study with 168 patients showed that NAC significantly reduced the rate of endoscopically confirmed relapses compared to the placebo group. Even 6 weeks after discontinuation of NAC, several markers remained improved in the NAC group compared to placebo, such as hs-CRP (an inflammatory marker).
Shirazi, K. M., Sotoudeh, S., Shirazi, A. M., Moaddab, S. Y., Nourpanah, Z., & Nikniaz, Z. (2021). Effect of N-acetylcysteine on remission maintenance in patients with ulcerative colitis: A randomized, double-blind controlled clinical trial. Clinics and Research in Hepatology and Gastroenterology, 45(4), 101532.
NAC may help lower blood pressure and homocysteine levels.
High blood pressure is one of the key risk factors for cardiovascular disease. A clinical study showed that daily intake of 1,800 mg NAC over one month was able to reduce both systolic and diastolic blood pressure. At the same time, homocysteine levels were reduced, another well-known risk factor for vascular disease.
In another study with diabetic patients, the combination of NAC and L-arginine led to an average reduction in systolic blood pressure of 10 mmHg, along with improved vascular function and a measurable decrease in oxidative stress.
Hildebrandt, W., Sauer, R., Bonaterra, G., Dugi, K. A., Edler, L., & Kinscherf, R. (2015). Oral N-acetylcysteine reduces plasma homocysteine concentrations regardless of lipid or smoking status. The American journal of clinical nutrition, 102(5), 1014-1024.
Martina, V., Masha, A., Gigliardi, V. R., Brocato, L., Manzato, E., Berchio, A., ... & Iannone, A. (2008). Long-term N-acetylcysteine and L-arginine administration reduces endothelial activation and systolic blood pressure in hypertensive patients with type 2 diabetes. Diabetes care, 31(5), 940-944.
Mucolytic, anti-inflammatory, and respiratory support.
NAC is one of the most well-researched natural compounds for respiratory health. Its mucolytic effect works by breaking disulfide bonds in mucus molecules, helping to thin mucus, making it easier to clear and relieving the airways.
In addition, NAC may help reduce inflammatory responses in the respiratory tract, supporting long-term airway health. Studies suggest that NAC may reduce the frequency of acute respiratory symptoms during periods of airway stress – whether related to cold-induced coughs, seasonal challenges, or increased environmental exposure.
Schwalfenberg, G. K. (2021). N‐acetylcysteine: a review of clinical usefulness (an old drug with new tricks). Journal of nutrition and metabolism, 2021(1), 9949453.
Sadowska, A. M., Verbraecken, J., Darquennes, K., & De Backer, W. A. (2006). Role of N-acetylcysteine in the management of COPD. International journal of chronic obstructive pulmonary disease, 1(4), 425-434.
Plant-based capsule shell by Vcaps®.
More and more people are opting for vegetarian options when choosing dietary supplements. That's why for our capsule shells we use purely plant-based ingredients from Vcaps®, a brand certified by the Vegetarian Society.
Quality you can trust.
We take quality seriously, and our Women’s Best NAC Capsules are manufactured to the strictest standards in Germany. Each batch undergoes rigorous testing to ensure it meets our high standards when it comes to quality and effectiveness.
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