Here Are Some of the Best Reasons You Should Take N-Acetyl L-Cysteine
Medically Reviewed by Dr. Nicole Avena

If you’re looking for a super-nutrient that can help support your immunity and longevity, consider taking a N-Acetyl L-Cysteine (NAC) supplement.

NAC Basics

NAC is a supplement form of cysteine, a non-essential amino acid. Similar to cysteine, NAC bonds glutamine and glycine to form glutathione, which is a powerful anti-inflammatory and antioxidant.

Antioxidants combat oxidative stress (or free radicals), which can cause damage to the body on a cellular level. An increase in free radicals can lead to cellular damage and the development of cardiovascular and neurodegenerative issues.

In addition to its antioxidant effects, NAC may help to improve brain health and benefit people dealing with serious cognitive or memory issues. It may have the capability of crossing the blood brain barrier. Also, NAC can bind to and remove dangerous toxic elements within the cells, making it a molecule critical to brain health.

Though small amounts of NAC can be found in some vegetables and fruits, many people take it as a nutritional supplement. NAC has been safely used for many years as an adjunctive therapy in treating many serious conditions, including immune and sleep issues.

To support your immunity, memory, cognition, and more, BrainMD is proud to announce its new NAC supplement.

NAC Supplements | Benefits of N-Acetyl L-Cysteine | BrainMD

BrainMD’s NAC Supplement: Antioxidant + Immune Support!

N-Acetyl L-Cysteine is a powerful neuroprotective antioxidant that supports healthy glutathione levels, helps to reduce oxidative stress, and promotes detoxification and fertility.* It also supports respiratory and immune function, liver and kidney activity, and cognition.*

Next-Level Nutrition

BrainMD’s NAC N-Acetyl L-Cysteine supplement contains 600 mg of NAC. When consumed, NAC breaks down into cysteine, then metabolizes into glutathione, the body’s master antioxidant and most integral part of the detoxification system.*

Without sufficient glutathione, your brain and body may not function at their best. Supplementing with glutathione’s precursor, N-Acetyl L-Cysteine, can help support your brain health, keep your cells energized, and your immune system functioning on high alert.*

Top Benefits of NAC

Here are some of the potential benefits of taking BrainMD’s NAC supplement:

  • Enhanced immunity*
  • Optimal brain function*
  • Healthy glutathione levels*
  • Antioxidant protection and detoxification*
  • Fertility support*
  • Healthy respiratory and lung functioning*

Who Can Benefit from NAC?

Men and women of all ages: NAC modulates oxidative stress and other pathophysiologic processes implicated in serious illness in both men and women. These include mitochondrial dysfunction, apoptosis, inflammation, and more.

Men and women who suffer from neurodegenerative conditions: This neurotropic supplement may support brain health and slow cognitive aging in people with serious memory problems. Given its powerful antioxidant capabilities, NAC works to combat free radicals that contribute to neurodegenerative issues.

Men and women with infertility: When taken with selenium, research shows that NAC can improve semen parameters in infertile men, making this nutrient combination an effective way to support male fertility. Also, in women with polycystic ovarian syndrome, NAC may improve insulin resistance; when added as an adjunct to the infertility treatment clomiphene, it increased ovulation and pregnancy rates.

NAC Ingredient

N-Acetyl L-Cysteine 

N-Acetyl L-Cysteine (NAC) provides powerful antioxidant defense against free radicals. NAC also enhances the electrochemical balance within nerve cells, helping to maintain optimal conditions for their metabolic and neurotransmitter activities. As a vasodilator, NAC helps to relax blood vessels, which can support the flow of blood, nutrients, and oxygen throughout the body.


How do I take NAC?

Adults (18+) should take 1 to 2 capsules per day, or as directed by your healthcare provider. As with other amino acids, it’s recommended to take NAC either 30 minutes before or 2 hours after eating a meal to avoid competing with protein for absorption.

Can this supplement make me dependent on it, or addicted?

No. Like other BrainMD products, this is a dietary supplement, not a drug, and is not habit-forming.

Is this product safe to take during pregnancy?

NAC should be taken under the guidance of a nutritionally-informed healthcare professional. If you’re pregnant or breastfeeding, it’s best to speak with your healthcare provider before starting any supplement.

Are there any allergens in NAC?

These vegan capsules are free from added dairy, sugar, soy, legumes, tree nuts, eggs, corn, and contain no artificial colorings or flavorings. They’re also gluten free, non-GMO, and are Kosher and Halal certified.

Was anything intentionally left out of this product that other companies use in their formulations?

Some companies add inactive ingredients – such as lecithin, gelatin, flour, and oils – to help fill up their capsules. Our capsules don’t contain these fillers.

Where should I store this supplement?

It’s recommended to store NAC somewhere cool and dry, away from water, sunlight, heat, and out of the reach of children.

Get To Know NAC

NAC is a potent antioxidant that has been shown to support cognition, fertility, respiratory health, and immune function.* Also, along with naturally increasing glutathione levels, NAC stabilizes protein structures and demonstrates mucolytic and antiviral properties.*

BrainMD’s NAC supplement is a 600 mg capsule that can be taken by mouth once or twice daily by adults ages 18 and older. As with all dietary supplements, it’s recommended that NAC be taken under the guidance of a nutritionally-informed healthcare professional.

For added antioxidant and immune system support, try BrainMD’s NAC today!


At BrainMD, we’re dedicated to providing the highest purity nutrients to improve your physical health and overall well-being. For more information about NAC and our full list of brain healthy supplements, please visit us at BrainMD.

*These statements have not been evaluated by the FDA. This content is for informational purposes only. It is not meant to substitute for medical or healthcare advice from a physician, nor is it intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before beginning a new health regimen.

Keith Rowe