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

by Jarrow
4.5 out of 5 stars 382 customer reviews
Amazon's Choice recommends highly rated, well-priced products available to ship immediately.
Amazon's Choice for "nac"

About the product
  • Optimized Release N-Acetyl-L-Cysteine Tablets.
  • SUSTAIN Bilayer Release Technology.
  • 9,000+ References on PubMed.
  • Detoxification, oxidative stress protection.
  • Vegan

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Product description

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

  • Product Dimensions: 6 x 5 x 4 inches ; 3.36 ounces
  • Shipping Weight: 4.8 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
  • ASIN: B0013OVVK0
  • UPC: 790011070016
  • Item model number: SUS
  • Average Customer Review: 4.5 out of 5 stars 382 customer reviews
  • Amazon Best Sellers Rank: #918 in Health & Household (See Top 100 in Health & Household)
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Important information

Safety Warning
Keep Out of Reach of Children

Legal Disclaimer
Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Ingredients
N-Acetyl-L-Cysteine, Carbomer, cellulose, calcium phosphate, beet root powder (for color), stearic acid (vegetable source), magnesium stearate (vegetable source), silicon dioxide and a food-grade coating.

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Customer Rating 4 out of 5 stars (382) 5 out of 5 stars (1) 4 out of 5 stars (43) 4 out of 5 stars (32) 4 out of 5 stars (109) 3 out of 5 stars (23)
Price $15.33 $27.74 $22.50 $19.99 $24.96 $18.90
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Fresh and Fast PharmaNAC Amazing Nutrition NusaPure LongLifeNutri Company
Directions Take 1 to 2 tablets per day, preferably on an empty stomach with fruit juice, or as directed by your qualified health care consultant. Suggested Use: For adults, take one (1) capsule daily, preferably with a meal. As a dietary supplement for adults, take one (1) vegetarian capsule daily, preferably on an empty stomach or as directed by your healthcare professional.
Item Dimensions 6 x 5 x 4 in 4.8 x 4.8 x 1.4 in 4.5 x 2.5 x 2.5 in 3 x 3 x 4 in
Item Form Tablets capsules Vegetarian Capsule
Safety Warning Prolonged or elevated intake may alter liver function tests without affecting actual liver function. Inform your physician that you are ingesting NAC if you undergo liver function tests. CAUTION: Do not exceed the recommended dose. Not intended for pregnant or nursing mothers. Not intended for children under 18 years of age. If you are taking any medications, have a known medical condition, or are planning a medical procedure, consult your doctor before use. Discontinue use and consult your doctor if any adverse reactions occur. Do not exceed the recommended dose. Pregnant or nursing women, under the age of 18 or individuals with a known medical conditions should consult a physician before taking this or any dietary supplement.

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