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Jarrow Formulas, N-A-C Sustain, N-Acetyl-L-Cysteine, 600 mg, 100 Tablets

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Jarrow Formulas, N-A-C Sustain, N-Acetyl-L-Cysteine, 600 mg, 100 Tablets

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Jarrow Formulas, N-A-C Sustain, N-Acetyl-L-Cysteine, 600 mg, 100 Tablets

In Stock
  • Expiration Date: 11/2019
  • Shipping Weight:
    0.41 lbs
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  • Product Code: JRW-07001
  • UPC Code: 790011070016
  • Package Quantity: 100 Tablets
  • Dimensions:
    4 x 2.3 x 2.3 in, 0.35 lbs
    Switch to Metric units
Frequently Purchased Together
Product Overview


  • Patented Formula!
  • Bilayer Tablets
  • Quick + Sustained Releases
  • Antioxidant and Glutathione Precursor
  • Supports Liver and Lung Function
  • Gluten Free
  • Dietary Supplement
  • Bilayer - Sustained - Quick

NAC Sustain is in a special Sustain bilayer Quick Release/Sustained Release format of N-Acetyl-L-Cysteine (NAC), a powerful antioxidant amino acid and a precursor to the critical antioxidant glutathione. Glutathione exerts a variety of protective effects, including detoxification and intracellular defense against oxidative stress. Substances known to reduce glutathione status are acetaminophen and alcohol.

The advanced bilayer Sustain tablets combine 1/3 Quick Release and 2/3 Sustained Release formats to both immediately raise and to maintain blood levels over a longer period of time. NAC Sustain releases in the small intestine over a 8 hour period, compared to the 1.5 hour biological half-life of NAC in the bloodstream.

Suggested Use

Take 1 tablet 1 to 2 times per day, preferably on an empty stomach with fruit juice, or as directed by your qualified healthcare professional.

Other Ingredients

Carbomer, cellulose, calcium phosphate, beet root powder (for color), stearic acid (vegetable source), magnesium stearate (vegetable source), silicon dioxide and an aqueous-based coating.

No wheat, no gluten, no soybeans, no dairy, no egg, no fish/shellfish, no peanuts/tree nuts.


Note: Prolonged or elevated intake may alter live function tests without affecting actual liver function. Inform your physician that you are ingesting NAC if you undergo liver function tests. If you have a medical condition, are pregnant, lactating, trying to conceive, under the age of 18, or taking medications, consult your healthcare professional before using this product.

Supplement Facts
Serving Size: 1 Tablet
Servings Per Container: 100
  Amount Per Serving % DV
N-Acetyl-L-Cysteine 600 mg
† Daily Value not established.
iHerb Customer Reviews

Great product

Posted by iHerb Customer on Feb 04, 2018 | Verified Purchase

Have reordered this product and will continue to do so. Efficient delivery too.

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Is sustain better

Posted by iHerb Customer on Jan 26, 2018 | Verified Purchase

I really don't know if this is better than the standard release formulation. I have not seen a dramatic difference. In theory it should be better.

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Life changing.

Posted by iHerb Customer on Jan 09, 2018 | Verified Purchase

This stuff has helped catapult my health back to much more normal. Vital as an ongoing supplement I feel.

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Posted by iHerb Customer on Dec 13, 2017 | Verified Purchase

This really works. Started cleaning out my lungs almost immediately.

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Affordable NAC

Posted by CharlotteJernigan on Dec 08, 2017 | Verified Purchase

Some great health benefits of NAC have been established by clinical trials but I take this to help reduce hair loss due to low thyroid function -- a friend claims his hair is much fuller and curlier with this product. Subjectively, I feel it is helping. Plus, my hair cutter said "Your hair is thicker!" when I went in a few days ago. (She knew nothing of my supplement efforts, her reaction was a truly spontaneous comment.) I also take extra biotin and either Ayurveda bhringaraj herb or TCM foti plus Pure Synergy "Bone Renewal." All of these benefit nails, teeth, hair and bones. The only reason I cannot give this product five stars is because it contains magnesium stearate, as most of the Jarrow line still does since they have not yet altered their factories to remove it from the process. This is especially unfortunate for a liver-detox support product. N.A.C. as precursor to the super antioxidant. Internet claims: "It may aid in the prevention of heart disease, boost the immune system, improve metabolism and promote hair growth. " Many people with lung and breathing issues respond well to it because it has been clinically proven to thin mucous and open breathing passages so it is sometimes prescribed physicians for this purpose. ++ c j

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