N-Acetyl L-Cysteine (NAC). Immune & Fertility Support in One Supplement

Updated: 12/7/23

Are you looking for an easy way to add additional immune and fertility support into your health regimen? If so, N-Acetyl L-Cysteine (NAC) is the perfect supplement for you! NAC has a wide range of properties that make it ideal for improving numerous aspects of overall health and wellness. Not only does regular intake help increase immunity, but it can also boost fertility in both males and females. Moreover, research shows that consuming NAC regularly may even reduce inflammation and protect against disease progression. This blog post will dive deeper into this remarkable supplement’s impressive impact on promoting optimal levels of body functions – read on to learn more about how adding NAC to your daily routine can benefit your health!

What is N-Acetyl L-Cysteine?

N-Acetyl L-Cysteine (NAC) is an amino acid that the body uses to produce glutathione, one of the most potent antioxidants in the body. NAC is naturally in many foods, including eggs, garlic, and dairy products. It is also available as a dietary supplement.

N-Acetyl L-Cysteine has numerous health benefits. It is most common in use to boost immunity, detoxify the liver, and support respiratory health. NAC is also used to treat acetaminophen overdose, as it can help to regenerate liver cells in cases of liver damage. Additionally, NAC finds to improve cognitive function, reduce inflammation, and even support healthy hair growth.

As mentioned earlier, N-Acetyl L-Cysteine comes from a variety of dietary sources, including garlic, eggs, and dairy. It is also available as a dietary supplement. In addition, NAC is in laboratories for pharmaceutical use.

NAC Banned?

Likewise, Amazon banned NAC from their marketplace website based on the U.S. Food and Drug Administration official requested the removal of the supplement from the Over-the-Counter market. However, the FDA request proved inconclusive, and people continued to take the supplement.

The FDA has approved the use of NAC for the treatment of certain respiratory conditions, but it hasn’t approved its use as a dietary supplement. However, NAC supplements are widely available over-the-counter, and many health enthusiasts swear by its benefits.

Since that time, Amazon now sells NAC on its marketplace website. The ban had little effect on the supplement’s market thanks to 57 years of verifiable positive feedback. Even though Amazon banned NAC for a short time, consumers could still get the supplement at their local health food store.

Semi-Essential Amino Acid

NAC falls under the semi-essential amino acids. Your body produces these other amino acids, specifically methionine and serine. For example, if your body’s consumption of amino acids becomes extremely low, then N-Acetyl L-cysteine converts into an essential need, fulfilling your body’s demand for these components. Thus, NAC is an extremely valuable supplement to the health of your body.

N-Acetyl L-Cysteine is an amino acid that is present in many foods such as eggs, cheese, poultry, and seeds. Your body can also make it from the L-glutamatergic acid. However, the human body doesn’t produce enough N-Acetyl L-Cysteine to fulfill all of its needs. Still, you can easily fulfill your body’s requirements by taking supplements.

What is in NAC?

The main component of NAC is cysteine, an amino acid that is in many different types of food including poultry, fish, and dairy. It’s essential for many bodily functions, including the production of glutathione, a powerful antioxidant that helps protect your body against harmful toxins and pollutants. NAC is in use to support liver health, promote lung function, and improve immune system function.

NAC is a benefit the brain in many ways, including through its ability to increase glutathione levels and reduce oxidative stress. It may also help increase focus and concentration, improve mood, and reduce anxiety. Additionally, NAC shows to improve insulin sensitivity and reduce inflammation, making it an excellent supplement for individuals looking to manage their blood sugar levels.

Let’s take a closer look at the benefits of NAC. NAC plays a crucial role in promoting respiratory health by thinning mucus and supporting healthy lung function. It has also been found to improve symptoms of chronic obstructive pulmonary disease (COPD) by reducing inflammation in the airways. In addition, NAC shows to support healthy liver function by enhancing the body’s natural detoxification processes.

Please discuss taking any new supplement like NAC with your physician.

What is N-Acetyl L-Cysteine Used For?

NAC is a natural supplement with many health benefits. From respiratory health to brain function, liver protection, exercise performance, and immune support, NAC can boost your overall wellness in many ways. If you’re interested in adding this powerful antioxidant to your daily regimen, be sure to consult with your healthcare practitioner to ensure its suitability for your individual needs. With regular use, you just might find that NAC can help to take your health and well-being to the next level.

N-Acetyl L-Cysteine Benefits

Improves Athletic Performance

NAC has been found to improve athletic performance. It increase the body’s production of nitric oxide, which enhances blood flow and provides more oxygen to the muscles, increasing endurance and reducing fatigue. NAC shows to reduce muscle damage and speed up recovery time. This makes NAC a popular supplement among athletes and fitness enthusiasts looking to gain a competitive edge.


NAC is a potent antioxidant that can help combat free radicals that damage our body cells. The production of free radicals is associated with many chronic diseases including cancer and heart disease. Antioxidants neutralize free radicals and prevent them from causing oxidative stress which is detrimental to our health.

Reduces Symptoms of Parkinson’s Disease

NAC has been found to improve brain function and reduce the symptoms of Parkinson’s disease. This is because NAC helps to reduce oxidative stress in the brain, which is associated with the development of Parkinson’s disease. Besides, it helps to increase the level of glutathione, a natural antioxidant that protects the brain from damage. A study conducted on NAC and Parkinson’s disease patients showed that patients who took NAC experienced significant improvement in their motor function compared to those who did not.

Guards Against Oxidative Damage

One of the most significant benefits of NAC is its potent antioxidant properties. NAC contains sulfur, which helps the body produce glutathione. Glutathione is an essential antioxidant that guards against oxidative damage caused by free radicals. Free radicals are unstable molecules that can damage cell structures and contribute to aging and disease. By enhancing glutathione levels, NAC helps reduce oxidative stress and promotes healthy aging.

Improves Kidney Function

NAC has been shown to improve kidney function in people with conditions such as chronic kidney disease and diabetes. It works by reducing oxidative stress and inflammation in the kidneys, which can lead to improved kidney function over time. If you have kidney issues, adding NAC to your supplement routine could be a game-changer

Supports Respiratory Health

NAC may help to combat respiratory infections and reduce congestion by breaking up mucus and promoting healthy lung function. This makes it an excellent supplement for those with chronic respiratory conditions like bronchitis, asthma, and COPD. Additionally, NAC can help to protect against common respiratory infections like the flu and colds, keeping your airways healthy and clear.

Regulates Blood Sugar Levels

NAC helps regulate blood sugar levels by improving insulin resistance. This is particularly helpful for those with diabetes or those who are at risk of developing diabetes. By regulating blood sugar levels, NAC also helps improve energy levels, and reduces cravings for sugar.

Promotes Healthy Aging

As we age, our bodies are more susceptible to oxidative stress and inflammation, which can lead to chronic disease. Adding NAC to your routine can help to protect against this oxidative stress and inflammation, promoting healthy aging and reducing the risk of chronic disease.

Enhances Brain Function

NAC has been shown to improve cognitive function, boost mental clarity, and reduce symptoms of depression and anxiety. It does this by increasing the production of glutathione and other important neurotransmitters that are essential for healthy brain function. With consistent use, NAC can help to improve memory, focus, and overall cognitive performance.

Improving Heart Health

NAC has been shown to have a positive impact on cardiovascular health. It can help lower blood pressure, reduce inflammation, and reduce oxidative stress on the heart. This makes NAC a valuable supplement for anyone looking to support overall heart health.

Can Improve Fertility

NAC can help increase fertility in both men and women by improving egg quality and sperm motility. NAC works by increasing antioxidant levels and reducing oxidative stress, which can damage sperm and cause DNA damage in eggs. By taking NAC, you can improve your chances of conceiving and increase your chances of having a healthy pregnancy.

Can Improve Skin Health

NAC can help improve skin health by protecting against UV damage, reducing inflammation, and improving collagen production. NAC has been shown to improve skin texture and reduce the appearance of fine lines and wrinkles, making it an excellent supplement for those looking to improve their skin health and appearance.

Enhances Tear Production

NAC has been shown to increase the production of tear fluid in the eyes. Tear fluid is essential for maintaining the health of your eyes, as it helps lubricate and protect the surface of your eye. By increasing tear production, NAC helps reduce dryness, irritation, and discomfort associated with dry eye.

Supports Liver Function

The liver is one of the most vital organs in the body, responsible for a range of functions, including detoxification. NAC has been shown to support liver function by increasing glutathione production. Glutathione helps the liver flush out toxins from the body, reducing the risk of liver damage and disease. NAC is also used to treat liver conditions like non-alcoholic fatty liver disease (NAFLD) and chronic hepatitis.

Boosts Immunity

NAC has also been found to boost immunity. Studies have shown that NAC helps reduce inflammation and increase the production of immune cells. NAC has been shown to be effective in reducing the symptoms and severity of respiratory infections, such as the flu and common cold. It is also in use to treat chronic lung diseases like chronic obstructive pulmonary disease (COPD).

Reduces Inflammation

Inflammation is a leading cause of chronic disease, and NAC can help to reduce inflammation throughout the body. It achieves this by supporting the body’s natural antioxidant defenses, which neutralize inflammatory compounds and reduce tissue damage. Many studies have shown that NAC can be an effective treatment for conditions like arthritis, inflammatory bowel disease, and even cancer.

Supports Mental Health

NAC has also been shown to be effective in supporting mental health. It is used to treat a range of brain disorders, including depression, anxiety, and obsessive-compulsive disorder (OCD). NAC works by increasing glutathione levels in the brain, which reduces inflammation and supports the growth and regeneration of brain cells. Studies have also found that NAC may be effective in treating addiction and substance abuse.

FDA Approved for Acetaminophen Poisoning

Did you know that N-Acetyl L-Cysteine is approved by the FDA to treat acetaminophen poisoning? Acetaminophen, also known as Tylenol, can be toxic to the liver in high doses. NAC shows to protect the liver by increasing glutathione levels, a powerful antioxidant that aids in detoxification. If you or someone you know accidentally ingests too much acetaminophen, talk to a healthcare provider to see if NAC could be an appropriate course of treatment.

N-Acetyl L-Cysteine Side Effects

N-Acetyl L-Cysteine is a beneficial supplement that has helped many people with various health conditions. However, it is important to understand the potential side effects before taking it. It is always advisable to consult your doctor before taking any supplement, and you should stop taking NAC if you experience any of the above-mentioned side effects.

Gastrointestinal Issues

One of the most common N-Acetyl L-Cysteine side effects is gastrointestinal issues like nausea, vomiting, and diarrhea. These symptoms are usually temporary and subside quickly. However, if you have a history of gastrointestinal issues, it is best to consult your doctor before taking NAC.


Some people may develop an allergic reaction to N-Acetyl L-Cysteine. This is more common in people who are allergic to sulfur. Symptoms of an allergic reaction may include hives, swelling, and shortness of breath. If you experience any of these symptoms, stop taking NAC immediately and seek medical help.

Skin Rash

Although rare, some people may develop a skin rash after taking NAC. This could be due to an allergic reaction to NAC or one of its constituents. If you experience a skin rash after taking NAC, stop taking it immediately and seek medical attention.

Low Blood Pressure

NAC may also cause low blood pressure in some people. This is more common during the first few days of taking the supplement. Symptoms of low blood pressure may include dizziness, lightheadedness, and fainting. If you experience any of these symptoms, stop taking NAC immediately and seek medical help.


Headaches are another common side effect of N-Acetyl L-Cysteine. This is usually a mild side effect and you can treat with over-the-counter pain medication. However, if you experience severe headaches or migraines, it is best to consult your doctor.

Blood Clotting Disorders

N-Acetyl L-Cysteine can also affect blood clotting. It can increase the risk of bleeding if you have a history of blood clotting disorders. So, if you have any history of blood clotting disorders or are taking medications that affect blood clotting, avoid taking N-Acetyl L-Cysteine.


Another potential side effect of N-Acetyl L-Cysteine is insomnia. This may be due to NAC’s ability to boost glutamate levels in the brain, leading to overstimulation in some individuals. If you’re taking NAC and notice trouble falling or staying asleep, consider taking it earlier in the day or reducing your dosage.

Interactions with Other Medications

NAC may interact with other medications, especially blood thinners like warfarin and heparin. It may also interact with medications for diabetes and chemotherapy. It is important to inform your doctor of all the medications you are taking before starting NAC.

Can You Take N-Acetyl L-Cysteine While Pregnant?

While there is no evidence that NAC is harmful to pregnant women, there is also no definitive evidence that it is safe. Most studies on NAC have been done on non-pregnant individuals, so there is limited data on the potential effects of NAC on developing fetuses. Some experts recommend avoiding NAC during pregnancy, while others believe that it may be safe to take in small doses.

There is little data on the potential risks of taking NAC during pregnancy. However, some experts believe that NAC may increase the risk of premature birth or miscarriage. Others believe that NAC may interfere with the absorption of some nutrients, such as iron. Pregnant women should always consult with their healthcare provider before taking any medications or supplements, including NAC.

N-Acetyl L-Cysteine for Fertility

One of the ways that NAC improves fertility is by reducing oxidative stress in the body. Oxidative stress is by an imbalance between antioxidants and free radicals, which can damage cells and contribute to infertility. NAC helps to balance this by acting as an antioxidant, protecting cells from damage and reducing inflammation.

Another way that NAC helps fertility is by regulating hormones. Hormonal imbalances can be a significant contributing factor to infertility, and NAC can help to restore balance. In women, NAC can help to regulate menstrual cycles and improve the quality of cervical mucus, while in men it can improve male hormone levels.

When taking NAC, it’s a recommendation to start with a low dosage and gradually increase it over time. For women, a common dosage is 600 mg per day, while for men it can go up to 1200 mg per day. It’s also advisable to take NAC in conjunction with other fertility supplements such as folic acid, zinc, and CoQ10.

N-Acetyl L-Cysteine for Anxiety

NAC works in several ways to improve mood and reduce anxiety. It regulates the activity of the neurotransmitter glutamate, which involves brain excitability. Excessive glutamate release can lead to overexcitation of neurons, leading to anxiety, depression, and other neurological conditions. NAC also increases the production of brain-derived neurotrophic factor (BDNF), which promotes neuronal growth and formation, leading to improved brain function and mood.

Several clinical trials indicate that NAC has potential in reducing symptoms of anxiety. One study published in the Journal of Clinical Psychopharmacology found that NAC reduces symptoms of obsessive-compulsive disorder (OCD) in individuals with moderate to severe symptoms. Another study published in the Journal of Affective Disorders found that NAC significantly reduced symptoms of depression and anxiety in patients with major depressive disorder.

N-Acetyl L-Cysteine and Glutathione Supplement

taking N-Acetyl L-Cysteine and glutathione supplements can provide significant benefits to your health. These supplements work together to boost your immune system, improve liver and kidney function, enhance brain function, and reduce inflammation. If you’re looking for a supplement that can help you achieve optimal health, NAC and glutathione supplements are a great place to start. They are generally safe and well-tolerated, so give them a try and see the incredible benefits they can provide for your health.

Where to Buy N-Acetyl L-Cysteine (NAC) Supplements?

You can purchase N-acetyl L-cysteine (NAC) at BulkSupplements.com. The company is an industry-leading manufacturer and distributor of pure dietary supplements. BulkSupplements.com is not just a consumer brand. It also supplies pure ingredients to other brands that distribute food and other supplement products. All products at BulkSupplements.com are manufactured and tested according to current and proper manufacturing practices.

Do you have an interest in trying N-acetyl L-cysteine (NAC) as a dietary supplement for its potential to support immunity function, respiratory health, boost fertility, stabilize blood sugar levels, skin health, mental health and nerve function? Contact BulkSupplements.com to place an order today.



N-Acetyl L-Cysteine Supplement Dosages

When it comes to NAC, there’s no “one size fits all” dosage. The amount you’ll need depends on your age, weight, and the condition you’re hoping to treat. For general health maintenance, a daily dose of 600-1,800 mg is a typical recommendation. If you’re using NAC to support respiratory health, higher dosages may be necessary – up to 2,400 mg per day.

The Bottom Line

N-acetyl L-cysteine is a powerful supplement with a wide range of applications, from supporting respiratory health to boosting mental wellness. By understanding the right dosages for your needs and choosing quality supplements from reputable manufacturers, you can make the most of this potent amino acid. Remember to always check with your doctor before starting any new supplement, and incorporate NAC into a holistic wellness routine that includes healthy habits like a balanced diet and regular exercise. With time and dedication, you’ll be well on your way to reaping the benefits of N-acetyl L-cysteine for yourself.

N-Acetyl L-Cysteine is a beneficial supplement that has helped many people with various health conditions. However, it is important to understand the potential side effects before taking it. In this blog post, we have discussed some of the common N-Acetyl L-Cysteine side effects to look out for, including digestive issues, asthma, low blood pressure, headaches, and skin rash. It is always advisable to consult your doctor before taking any supplement, and you should stop taking NAC if you experience any of the above-mentioned side effects.

As you can see, N-Acetyl L-Cysteine is a powerful and versatile supplement that offers a range of health benefits. Whether you need to support your immune system, promote respiratory health, enhance cognitive function, or promote liver health, NAC can help. With its potent antioxidant properties and natural anti-inflammatory effects, NAC is an excellent addition to anyone’s diet. So why wait? Start reaping the many benefits of N-Acetyl L-Cysteine today!

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.

Author: BulkSupplements Staff