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Allergy Research Group   NAC N-Acetyl-L-Cysteine - 120 Tablets

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7 Reviews

"Cysteine is a precursor to glutathione. This strengthens one's immune system."  Read all reviews

Item Number: ALL1156
Serving Size: 1 Tablet Servings per Container: 120
Price per Serving:  $0.33 Price per Unit*: $0.33 per Tablet
* Price Per Unit may reflect product's price per capsule, tablet, ounce, fluid ounce, etc.
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N-Acetyl-L-Cysteine (NAC) is derived from L-cysteine‚ an amino acid which is a precursor to glutathione‚ an important antioxidant. Only a limited amount of glutathione is naturally present in the human body; therefore‚ it must be synthesized from cysteine.

NAC is the primary antioxidant produced by your body‚ and is involved in a number of crucial metabolic processes. It also plays an important role in protein synthesis‚ the activation of enzymes‚ and the synthesis and repair of your DNA. NAC is also a source of sulfur; sulfur metabolism is a key biological process in all living organisms‚ because it acts as a constituent of molecules like methionine‚ cysteine‚ and coenzyme-A‚ all of which are crucial in energy generation and enzymatic processes.

L-cysteine is relatively unstable‚ and often it is degraded during the process of absorption to the point where your body is not able to use it. NAC‚ however‚ is more stable‚ which is why it’s well-suited to supplements. After absorption‚ NAC is converted into L-cysteine‚ which increases cysteine levels throughout the body. Each tablet of Allergy Research Group’s NAC N-Acetyl-L-Cysteine contains this free-form amino acid in order to provide you with many health benefits.

One bottle of NAC N-Acetyl-L-Cysteine contains 120 tablets‚ which is enough to last for up to four months‚ depending on your dosage.

Allergy Research Group is one of the more long-standing dietary supplement providers in the market today. They were established more than 30 years ago. Despite their long-standing status‚ however‚ Allergy Research Group uses the most cutting-edge scientific findings to guide their supplement design process. They are constantly refining and perfecting formulas – even those that they have been using for decades. Many doctors and health care practitioners choose Allergy Research Group for their supplements.

These statements have not been evaluated by the Food and Drug Administration (FDA). These products are not meant to diagnose‚ treat or cure any disease or medical condition. Please consult your doctor before starting any exercise or nutritional supplement program or before using these or any product during pregnancy or if you have a serious medical condition.

  • MFG # 71370
  • UPC # 713947713703
Official Website:

Serving Size 1 tablet

Servings per container 120

Amount per serving:

N-Acetyl-L-Cysteine 500 mg

Other ingredients: Dicalcium phosphate‚ cellulose‚ magnesium stearate‚ silicon dioxide‚ stearic acid.

This nutrient is of the highest quality and purity obtainable‚ free of all common allergens (antigens)‚ and does not contain preservatives‚ diluents‚ or artificial additives.

Suggested Use: As a dietary supplement‚ 1 tablet one to three times daily‚ or as directed by a healthcare practitioner.

Keep in a cool‚ dry place‚ tightly capped.

  • Hypoallergenic

Ratings and Reviews

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  • 4.7
5 7
  • 7 Reviews
    • NAC

      from Hillsborough NJ on 6/15/2021
      These Aminos are a God send. My hip and shoulder pain are improving just after 3 weeks. This company has impeccable service.


      Works great


      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Doctor-recommended Supplement

      from Plano TX on 3/29/2021
      Cysteine is a precursor to glutathione. This strengthens one's immune system.


      See above.


      review-checkI would recommend this item to a friend.
    • NAC Supplement

      from Las Vegas on 11/14/2015
      NAC N-Acetyl-L-Cysteine by Allergy Research Group works with my body to detoxify, very good.


      I like the convenience of NAC.


      Strong odor.
      review-checkI would recommend this item to a friend.
    • Recommended by my Doctor

      from Gilbert AZ on 10/10/2014
      My Doctor gave me the first bottle of NAC by Allergy Research Group and by the time I was half way through the contents it was doing what the Doctor said it could do and that was to help me keep my lungs clear. I then had my husband find an outlet to order an additional supply for me.


      I have COPD and this really helps me breath.


      Have not experienced anything of dislike.
      review-checkI would recommend this item to a friend.
    • Verified Buyer


      from Oklahoma on 3/02/2013
      In October I had severe lung congestion with a horribly deep cough that just wouldnt clear up. I went to a naturopathic doctor in Edmond OK for nutritional IVs. While there another patient who was a rep for a nutritional assessment testing company told me to get NAC as it helps build heathy lungs and is highly recommended for people with COPD. Having been a muscle therapist and distributor of nutritional supplements I am very familiar with the Allergy Research Group brand which I feel is one of the best. I began taking NAC N-Acetyl-L-Cysteine along with the other nutrients I had been taking that are known to help but hadnt been enough up to that point. It was the turning point! I am still taking one tablet most days to maintain as a precaution during the winter months-especially if I have any kind of head or chest congestion. I just ordered three more bottles to make sure my husband and I dont run out! Who knows when you might need to share a bottle with family or friends!


      Reputable Brand easy to swallow no aftertaste. No side affects. Did what it was supposed to do.


      No Dislikes
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Helped me with allergies

      from Plymouth NH on 2/16/2013
      I took NAC N-Acetyl-L-Cysteine to help with my allergies.


      Easy to swallow caplets.


      Nothing really.
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Excellent support for liver.

      from Cuero, TX on 12/13/2012
      Ive been takingNAC N-Acetyl-L-Cysteine for years. Have beaten cancer. Now at age 76 feel better than Ive felt for a LONG time. Im sure the NAC has helped.


      Price is good. Easy to swallow.


      Cant think of anything I dislike.
      review-checkI would recommend this item to a friend.

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If you have any general questions regarding orders or our policies and programs, please contact our Customer Happiness Team @ 1.800.383.6008

If you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use. Your healthcare professional is the best source for guidance before beginning an exercise or nutritional supplement program.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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