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Natural Factors, NAC, N-Acetyl-L Cysteine, 500 mg, 90 Vegetarian Capsules


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Natural Factors, NAC, N-Acetyl-L Cysteine, 500 mg, 90 Vegetarian Capsules

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Natural Factors, NAC, N-Acetyl-L Cysteine, 500 mg, 90 Vegetarian Capsules

In Stock
500 mg
500 mg
600 mg
90 Vegetarian Capsules
90 Vegetarian Capsules
60 Vegetarian Capsules
  • Expiration Date: 07/2020
  • Shipping Weight:
    0.11 kg
    Switch to Imperial units
  • Product Code: NFS-02815
  • UPC Code: 068958028156
  • Package Quantity: 90 Vegetarian Capsules
  • Dimensions:
    5.1 x 5.1 x 9.9 cm , 0.09 kg
    Switch to Imperial units
Frequently Purchased Together
    Product Overview


    Dietary Supplement

    Convert Fat Into Energy

    Purity & Potency Guaranteed

    NAC (N-Acetyl-L-Cysteine) is a highly stable form of cysteine that provides antioxidant support and is especially beneficial for active people, the elderly and those exposed to polluted environments. Natural Factors amino acids are the highest quality pharmaceutical grade products available.

    Manufactured by Natural Factors to ensure safety and potency in accordance with the Good Manufacturing Practices (GMP), of the FDA and Health Canada.

    Suggested Use

    1 capsule, 2-3 times per day or as directed by a health professional.

    Other Ingredients

    Rice powder, vegetarian capsule (carbohydrate gum [cellulose], purified water), magnesium stearate (vegetable grade).

    Contains no artificial preservatives, color or sweeteners; no corn, dairy, gluten, soy, starch, wheat or yeast. Suitable for vegetarians.


    Although NAC's active sulfur is beneficial, some people sensitive to the sulfur may experience stomach irritation.

    Keep out of reach of children.

    Sealed for your protection. Do not use if seal is broken. For freshness, store in a cool, dry place.

    Supplement Facts
    Serving Size: 1 Capsule
      Amount Per Serving %Daily Value
    N-Acetyl-L-Cysteine (Pharmaceutical Grade) 500 mg **
    ** Daily Value not established.
    iHerb Customer Reviews

    cured headaches

    Posted by iHerb Customer on Sep 02, 2016 | Verified Purchase

    This product 2 x per day, plus Tyrosine 2 x 500 mg per day, cured my almost daily headaches. Headaches that had been going on for years. I believe it was 1 of the 2 products, I just don't know which one. I started taking them for an entirely different reason. This product did dry my skin (I read this can be a side effect). I have to use extra moisturizer. Not a reason to stop taking it.

    Thanks for your feedback!

    Good product at an okay price

    Posted by iHerb Customer on Feb 11, 2016 | Verified Purchase

    Not the most bang for your buck but is definitely the real stuff and works as claimed!

    Thanks for your feedback!

    Natural Factors, N-Acetyl-L Cysteine, 500 mg, 90 Veggie Caps

    Posted by iHerb Customer on Mar 29, 2014 | Verified Purchase

    Natural Factors, N-Acetyl-L Cysteine, 500 mg, 90 Veggie Caps good and cheap

    Thanks for your feedback!

    not as good as Twinlab's NAC

    Posted by iHerb Customer on Mar 24, 2014 | Verified Purchase

    I have used Twinlab's NAC just before this one and the difference is there undoubtedly. Natural Factors has a very strong (slightly unpleasant) smell which Twinlab doesn't have. Whenever I took NAC from Twinlab in the evening I would get a very good, resting sleep. This doesn't happen with Natural Factors's NAC. Plus my mind seemed clearer with Twinlab's product...not the same benefit wih this one. I wanted to same some money in shipping but ended up with I product I won't be using. My conclusion would be: try NAC, just not this particular brand as there are better ones out there. Don't know if Twinlab is one of the best, but to me it definitely felt better.

    Thanks for your feedback!

    These Are Great

    Posted by iHerb Customer on Mar 22, 2014 | Verified Purchase

    My moods are substantially better on these and I am only taking one a day. am very pleased with them. Taking on an empty stomach requires some discipline!

    Thanks for your feedback!