Your Cart is Empty
But it doesn't have to be.
Continue Shopping.
Added to Cart
Cart Total:
Customers Also Bought:

You purchased this item on

View this order

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

Our Price:
You Save:
$7.78 (30)
Earn 10% Loyalty Credit ?

Sorry, this product is no longer in stock.

This product is already in your Wish List.

View Wish List

This product is now in your Wish List.

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)
Bundle Offer
Save $4.00 when you purchase these items today for only $22.17
Total: $26.17
Combo Discount: - $4.00
Together: $22.17

Sorry, this product is no longer in stock.

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


Posted by Reviewer2211400 on Dec 01, 2016

love this NAC. will buy again!

Verified Purchase

Was this review helpful to you?


Posted by 5758134887873404541 on Dec 01, 2016


Verified Purchase

Was this review helpful to you?

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.

Verified Purchase

Was this review helpful to you?

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.

Verified Purchase

Was this review helpful to you?

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.

Verified Purchase

Was this review helpful to you?