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

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In Stock
  • Expiration Date: Sep 2018
  • Shipping Weight: 0.41 lbs (0.19 kg)
  • Product Code: JRW-07001
  • UPC Code: 790011070016
  • Package Quantity: 100 Tablets
  • Dimensions: 4 x 2.3 x 2.3 in, 0.35 lbs (0.16 kg)
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Save CA$5.39 when you purchase these items today for only CA$33.88
Total: CA$39.27
Combo Discount: - CA$5.39
Together: CA$33.88

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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 SustainĀ 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, calcium phosphate, cellulose, stearic acid (vegetable source), magnesium stearate (vegetable source), silicon dioxide, beet root powder (for color) 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 liver function tests without affecting actual liver function. Inform your physician that you are ingesting NAC if you undergo liver function tests.

Keep out of the reach of children.

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

The only timed release form of NAC I know of.

Posted by Reviewer1122052 on Sep 28, 2016

I take NAC only to counteract any negative effects of paracetamol/acetaminophen use when I have migraine attacks. This sustained released version means whenever migraine comes knocking on my door, I can simply pop one together with my paracetamol and have my bed rest with peace of mind knowing it will work for the next few hours without the need for a re-dose.

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Street Sweeper For The Body

Posted by Sickness-ELIMINATOR on Sep 11, 2016

I've been taking N-A-C on and off for more than three years, and it's helped a great deal with alleviating sinus congestion. After having tried a few different brands N-A-C supplements, I've settled on Jarrow Formulas sustained release version. The pill is 1/3 quick release and 2/3 sustained release. This does two things: First, it provides the body with more consistent, sustained levels of L-cysteine through the day and night. Second, it doesn't unsettle my stomach like the other quick release N-A-C tablets I have used. Ideally, the pill should be taken in between meals. I take one pill about an hour after breakfast and another pill before bed. The extra boost of Glutathione provided by N-A-C has a noticeable effect on reducing my sinus congestion during cold and allergy season. It's apparent within a few days of beginning the supplement that I can breathe easier and have less difficulty with my allergies -- especially dust. For example, within a week of using N-A-C I was able to discontinue my nightly use of nasal strips for congestion relief. I also notice a difference when I'm jogging or playing soccer. I seem to be able to pull more air deeper into my lungs, improving my stamina. . . . Click YES if this review was beneficial for you.

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You can feel the difference

Posted by DownNotOut on Sep 04, 2016

Makes you feel brighter if you have ME/CFS, fibromyalgia or Relapsing Fever. Other brands and formulations do not allow me to feel a significant benefit. Not sure why.

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Have on hand for hangovers and if you take lots of Tylenol

Posted by 5154877746534078903 on Jan 04, 2016

Fantastic product. On the rare occasion I drink alcohol, this has helped to prevent or treat hangovers. The best strategy is to take N-A-C before you drink, though. I have also taken this after consuming tylenol for a few days. It seems to help detox the liver faster so side effects from tylenol, alcohol, etc are much less severe.

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Really Works - so happy about it!

Posted by Reviewer3291104 on Jul 21, 2015

We read one of the reviews that said to take 3-4 tablets every three hours if not feeling well and didn't believe it. In Singapore, when one of us starts getting congested and achy, we all do, but this time, my husband was sick and I thought we might as well try to follow these instructions. Mind you, we have tried the gambit of products - and alternatives - and always ended up with the whole family on antibiotics because the sickness turned into a bacterial infection, strep or tonsillitis mostly. So, when my husband started taking this product, 3-4 tablets every 3 hours, he recovered within 5 days and never took time off work from exhaustion AND the rest of the family stayed well. This is truly remarkable considering our history! I found another N-A-C product in Singapore and the bottle was Singapore $55.00, or around $40 USD. So, the price is also affordable.

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