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Life Extension, N-Acetyl-L-Cysteine, 600 mg, 60 Veggie Caps

Life Extension, N-Acetyl-L-Cysteine, 600 mg, 60 Veggie Caps

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In Stock
  • Expiration Date: Mar 2019
  • Shipping Weight:
    0.18 lbs
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  • Product Code: LEX-15436
  • UPC Code: 737870154365
  • Package Quantity: 60 Veggie Caps
  • Dimensions:
    2.1 x 2.1 x 3.8 in, 0.15 lbs
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Product Overview


  • Boosts Cellular Glutathione Levels
  • Dietary Supplements

L-cysteine is a conditionally essential amino acid, one of only three sulfur-containing amino acids, the others being taurine (which can be produced from L-cysteine) and L-methionine (from which L-cysteine can be produced in the body by a multi-step process). Cysteine plays a role in the sulfation cycle, acting as a sulfur donor in phase II detoxification and as a methyl donor in the conversion of homocysteine to methionine. Cysteine also helps synthesize glutathione, the body’s most important intracellular antioxidant and a vital detoxifier.

N-acetyl-L-cysteine (NAC) is the acetylated form of L-cysteine that has been used to break up pulmonary and bronchial mucous. It is very efficiently absorbed and has been shown to protect cells directly and support the immune system. NAC is an antioxidant and a free radical-scavenging agent that increases intracellular glutathione at the cellular level. NAC can act as a precursor for glutathione synthesis as well as a stimulator of the cytosolic enzymes involved in glutathione regeneration. NAC has been shown to protect against oxidative stress-induced neuronal death in cultured granule neurons.

Suggested Use

Read the entire label and follow the directions carefully prior to use.

Take one (1) capsule one to three times daily with or without food, or as recommended by a healthcare practitioner.

Other Ingredients

Vegetable cellulose (capsule), vegetable stearate, silica.


Caution: Those who supplement with NAC should drink 6 to 8 glasses of water daily in order to prevent cysteine renal stones. Cysteine renal stones are rare but do occur.

  • Keep out of reach of children.
  • Do not exceed recommended dose.
  • Do not purchase if outer seal is broken or damaged.
  • When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

Store tightly closed in a cool, dry place.

Supplement Facts
Serving Size: 1 Vegetarian Capsule
  Amount Per Serving % Daily Value
N-acetyl-L-cysteine 600 mg **
**Daily Value not established.
iHerb Customer Reviews

Great for sleep and cleansing lungs

Posted by Reviewer2385523 on Mar 16, 2017 | Verified Purchase

This product and this producer have helped me for several years. I sleep better and longer than before when I was waking up every hour. I also learned while in India that this product helped my lungs and body process the pollution without getting sick. India's pollution is far more than any city we have in the USA.

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I feel bad

Posted by 5067175820608116590 on Mar 07, 2017 | Verified Purchase

I did not yet recieve my order. The expected date to be delivered was February 1 to February 13. Now its March 7.

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Just feel better when I take these

Posted by 5190714549484903729 on Feb 22, 2017 | Verified Purchase

Not sure what these actually do but I seem to feel better when I take them, especially during times of a bit too much partying or irregular eating or stress.

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No really visible effect

Posted by 5636354660191386472 on Feb 08, 2017 | Verified Purchase

I have been using this product for a month now together with vit C. I have not experienced any visible effects, I can just hope that there is some change happening underneath....

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Hopefully helpful

Posted by 5236704507994764924 on Nov 20, 2016 | Verified Purchase

Don't know yet but hopefully helpful

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