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Jarrow Formulas, N-Acetyl-L-Cysteine, 500 mg, 200 Capsules

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In Stock
  • Product Code: JRW-07003
  • UPC Code: 790011070030
  • Package Quantity: 200 Capsules
  • Dimensions: 2.5 x 2.5 x 5 in, 0.4 lbs (0.18 kg)
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Product Overview


  • N-Acetyl-L-Cysteine
  • Precursor to Glutathione
  • Supports Liver & Lung Function
  • Dietary Supplement

N-Acetyl-L-Cysteine (NAC) is a powerful antioxidant amino acid and a precursor in the body 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.

Suggested Use

Take 1 capsule 1 or 2 times per day or as directed by your qualified healthcare professional.

Other Ingredients

Cellulose, magnesium stearate (vegetable source) and silicon dioxide. Capsule consists of gelatin.

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


Store in a cool, dry place, or at room temperature, and away from light.

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. If you have a medical condition, are pregnant, lactating, trying to conceive, or taking medications, consult your healthcare professional before using this product.

Keep out of the reach of children.

Supplement Facts
Serving Size: 1 Capsule
Serving Per Container: 200
Amount Per Capsule % DV
N-Acetyl-L-Cysteine 500 mg *
* Daily value not established.
iHerb Customer Reviews


Posted by 4652454485265281111 on May 09, 2016

I think these work for me, i feel less anxious when i take them.

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Pure stuff

Posted by CookForHealthNL on Dec 26, 2015

Good quality.The brain fog is gone and my skin improved.

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Not for everyone

Posted by 5563996035167001097 on Dec 09, 2015

This product sent me straight to the toilet and had a very strong unpleasant smell. Threw it away.

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Pharmaceutical Grade but too strong for me

Posted by 5083341630479701874 on Oct 27, 2015

This product is obviously very pure. It has the same smell of the NAC I've bought from pharmacies and is a really great price so it's taken some modification and I'm still experimenting to get the dose right. I started at 2000mg, taken in two doses which is the recommended dose for NAC for anxiety and depression, but it was way way too strong. I felt very foggy and far away so I wrote it off. However, it was so effective for sleep and for bowel movements (as the medication I take is incredibly constipating) and when I went off of it, I could feel the withdrawal. So I've cut down on sleep meds, which is wonderful and I'm just taking 500mg at night and taking another brand of NAC, which is much less potent, during the day. So far so good. This is obviously a very good brand and cost effective, it's just so potent that I still need to experiment with the dosage. Eventually I'd love to just be taking this stuff.

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smels strange

Posted by 5067119457281927627 on Aug 17, 2015

not so good

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