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Jarrow Formulas N-A-C Sustain, Supports Liver and Lung Function, 600 mg, 100 Sustain tabs

from Jarrow
4.5 out of 5 stars 142 customer reviews
| 9 answered questions
About the Product
  • Glutathione exerts a variety of protective effects
  • Detoxification and intracellular defense against oxidativestress
  • Substances known to reduce glutathione status are acetaminophen and alcohol

Frequently Bought Together

  • Jarrow Formulas N-A-C Sustain, Supports Liver and Lung Function, 600 mg, 100 Sustain tabs
  • +
  • Jarrow Formulas Ubiquinol Plus Pyrroloquinoline Quinone, Supports Heart Health and Cognitive Function, 30 Softgels
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  • Jarrow Formulas Pyrroloquinoline Quinone, Supports Heart and Cognitive Function, 20 mg, 30 Caps
Total price: $48.73
Buy the selected items together


Product Description

Size: 100 tabs

Product Profile

Jarrow Formulas N-A-C (N-acetyl-L-cysteine) is a stable form of the amino acid L-cysteine. N-A-C is cysteine that has been modified with an acetyl group are stabilized and made more bioavailable. It is essentially a combination of cysteine and acetic acid, which is a primary component of vinegar. L-cysteine, like cystine and taurine, is a sulfur-containing amino acid that can be produced by the body from the essential amino acid methionine. It is considered a non-essential amino acid for this reason, but is conditionally essential in infants and in the case of certain nutrient deficiencies or debilitating conditions. Inadequate methionine in the diet, low selenium intake, chronic disease, and advancing age reduce the body’s ability to convert methionine to cysteine. Likewise, stress and environmental toxins may increase the need for cysteine beyond the body’s capacity for conversion. N-A-C is preferred to cysteine, or cystine, as a supplement because of its stability, solubility, and greater ability to donate sulfur.

Distinguishing Features:

  • Bilayer release technology: 1/3 quick, 2/3 sustained release
  • Antioxidant support both inside cells and in cell membranes*
  • Patented formula
Glutathione: Building Your Own Antioxidant*

N-A-C supplies readily available L-cysteine, which acts as an antioxidant itself or as a precursor to glutathione.* Glutathione is one of the body’s most important and abundant antioxidants inside of cells. The primary antioxidant mechanism involves the donation of an electron from the sulfhydryl (-SH) group of the cysteine molecule. Sulfhydryl-containing substances like N-A-C, cysteine, glutathione, and alpha-lipoic acid are referred to as reducing agents. This is opposed to oxidizing agents. Since reducing agents have opposing chemical functionality to oxidizing agents, reducing agents are also anti-oxidizing agents - or antioxidants. Antioxidants guard against the production and propagation of free radicals caused by oxidation. Antioxidants like cysteine act as electron donors and receptors to neutralize uncontrolled free radicals without becoming reactive or toxic themselves.* Glutathione, which contains cysteine, donates its own electrons to free radicals to reduce them to stable compounds. One example is the transformation of superoxide or peroxide to water. In the process, glutathione becomes oxidized. It is then reactivated by the donation of electrons and protons to become reduced glutathione, thereby making it electron-rich again and ready to scavenge yet more free radicals. Making cysteine more available to the body encourages the production of glutathione. Cysteine is also an antioxidant in its own right by virtue of its sulfhydryl group, and plays a vital role in the stability and functioning of proteins.* Cysteine, in proteins, also interacts with iron and zinc in the body to form enzymes that help coordinate respiration, energy production, immune surveillance, and repair functions in all tissues.* In hospital practice, N-A-C, rather than reduced glutathione, is given to support blood levels of glutathione.*

Liver Support*

Cysteine can neutralize chemicals known as aldehydes produced by air pollutants (i. e., smoke), some drugs, and by the liver as a byproduct of alcohol metabolism.* N-A-C is therefore important for maintaining the body’s antioxidant defenses in the face of everyday assaults.* N-A-C may be beneficial in reducing side effects of the pain reliever acetaminophen, particularly when ingested with alcohol, or taken in excessive amounts. Acetaminophen poisoning is the most common cause of calls to poison control centers in the United States. It causes severe damage to the liver. N-A-C supports the health of liver tissue by replenishing liver glutathione levels and also by enhancing the delivery of oxygen to liver cells.*

Advantages Of N-A-C Sustain

N-A-C Sustain is a bilayer quick release/sustained release N-A-C formulation. One third of the N-A-C releases rapidly and two thirds releases slowly over time. This raises blood levels quickly while also sustaining them.* N-A-C SUSTAIN releases in the small intestine over a longer period, which greatly assists in N-A-C antioxidant effect beyond the typical biological half-life (1. 5 hours) of N-A-C in the bloodstream.*

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


Product Details

Size: 100 tabs
  • Product Dimensions: 6 x 5 x 4 inches ; 3.4 ounces
  • Shipping Weight: 5.6 ounces (View shipping rates and policies)
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • Origin: USA
  • ASIN: B0013OVVK0
  • UPC: 790011070016
  • Item model number: SUS
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (142 customer reviews)
  • Amazon Best Sellers Rank: #1,597 in Health & Personal Care (See Top 100 in Health & Personal Care)

Important Information

Safety Warning
Keep Out of Reach of Children

Legal Disclaimer
Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. Please see our full disclaimer below.

Customer Reviews

Top Customer Reviews

Size: 100 tabs Verified Purchase
A friend of mine and I used to joke about how it's like breathing in yogurt here in the south with the heat, humidity and allergens. We were fellow asthma sufferers. I had been on an inhaled corticosteroid (Asmanex) for five years, due to adult onset asthma. I'm grateful for Asmanex because it helped me to breathe and kept my lungs from being damaged. I tried several times to go off of it because you never know what side effects await you down the road. But to no avail. After a few days I would go back on it because I like breathing. My friend texted me one day and told me she wasn't breathing yogurt anymore because of NAC. So I decided to try it. I picked up the Jarrow NAC sustained release and started out with three a day. Then two, Then one. Now all I do is take one each morning as soon as I wake up and I have no problems breathing and I am off of Asmanex successfully. This supplement has been endorsed by both the traditional and the alternative medical communities. NAC is what they give you if you go into the ER with acetaminophen poisoning. Evidently it binds it and takes it out of your system. It is also supposed to boost your immune system and there are a host of other things that it does for you. For me, just being able to breathe without drugs is a beautiful thing. And btw, I can breathe better using NAC than I could on the inhaled corticosteroid. Even on Asmanex, I couldn't be in a room with cooking or burning grease. Now it doesn't bother me at all. And I never need a rescue inhaler. Humidity hasn't bothered me either. For some reason, Jarrow's sustained release works better for me than straight NAC. Don't know why, but I don't argue with results. I'm surprised that more pulmonologists and allergists don't know about this. I guess information takes time to circulate. Try NAC.Read more ›
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Size: 100 tabs Verified Purchase
I have been in the health field for years and know brands and products. I also have smoked in the past and can tell you that within 30 minuets for me since my digestion is fast it starts to work by clearing excess mucus and swelling in my lungs and lympth nodes. It also has been studied for mentally ill people to help their brains detox. They did a study with 1 gram in morning and 1 gram at night for schizophrenics. I like this method of detox the best nice and clean and fast. As for the tinnitus there isnt anything that will help that I have it too best thing you can do is go with the flow and not fight the inevitable and your stress will go down. Learn to enjoy it. This brand is time release wich is unique. The only other brand I would suggest is solgar vegitarian.
hope it helps you it has helped me alot. My mind is clearer too.
4 Comments 74 of 80 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 100 tabs Verified Purchase
I have taken this product for over 6 months and it is better than Mucinex or any other mucus reducing product. If you have problems with sinus congestion, bronchial products and/or asthma-Please look into the research for this product. It sure has helped me feel better.
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Size: 100 tabs Verified Purchase
I love this supplement! I definitely notice the difference with my anxiety levels. I've been having panic attacks for the last 6 years, getting more frequent within the past several months. They made me feel like I was trapped--weak, heart racing, like I was going to die. It feels like a huge adrenalin rush combined with fear. Another physical symptom was stomach distress--very nervous stomach. The panic attacks would usually be triggered in claustrophobic situations---the smaller the room and the more people in that room and the quieter the room---the more likely I'd have a panic episode. I have tried so very many different supplements. (I avoided prescription drugs because I've read about side effects and I don't even want to go to a doctor's office out of fear I'd have a panic attack there.) Securus seemed to be the most helpful. I've tried 5HTP, ashawagandha, True Calm, Pure Calm--all of which helped, but I'd still feel a twinge of panic setting in, which was enough to lead to a panic attack if I didn't either get out of the room or try to mentally overcome it---It seemed like these supplements helped as long as I didn't think too much about the possible panic attack coming on....it is mentally exhausting to try to avoid panic attacks. NAC seems to help the most so far...I feel calmer--no adrenalin rushy feeling lurking in my stomach...so I don't have to be so mentally exhausted trying to avoid the panic. It's only been a week, but I'm hoping it will work forever for me!! It would be so nice to be able to attend more meetings and get-togethers without fear. I usually avoid going places which makes me act like a homebody.Read more ›
2 Comments 20 of 21 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 100 tabs
I learned from people interested in naturopathy that Jarrow is a brand to be trusted for purity and potency. I have been using their sustain formula by taking one with plenty of water every night a few hours after my last meal, and one every morning before I make my breakfast. I take it for its antioxidant strength. I understand that amino acids like NAC work much better when taken on an empty stomach. I like the idea of taking a time-release form because NAC has such a short half-life. This tablet isn't the easiest to swallow: it has an unpleasant taste and sharper edges than a capsule, but at least it is shaped like a capsule instead of being circular.
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Jarrow Formulas N-A-C Sustain, Supports Liver and Lung Function, 600 mg, 100 Sustain tabs
This item: Jarrow Formulas N-A-C Sustain, Supports Liver and Lung Function, 600 mg, 100 Sustain tabs
Price: $15.10
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Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.