N-Acetyl L-Cysteine (NAC)

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Cysteine may assist in overall detoxification of the body and reducing stress from oxidation and may help benefit physical fitness.

Health Benefits Provided by N-Acetyl L-Cysteine

NAC is able to neutralize free radicals that roam throughout the body damaging healthy cells. NAC, being a precursor to Glutathione, may assist in promoting healthy immune and liver function. NAC may also reduce harm caused by the overuse of Tylenol. It does this so well that it is actually used as a treatment for acetaminophen poisoning by doctors. NAC does this by increasing the functioning of the liver and breaking down accumulated mucus.

Supplement Facts
Serving size: 600 milligrams
Serving per container: *
Amount Per Serving % Daily Value**
N-Acetyl L-Cysteine 600mg *
* Daily Value not established.
** Based on 2,000 calorie diet


Sugar, soy, dairy, yeast, gluten, corn and additives.

As a dietary supplement, take 600 mg up to three times daily, or as directed by physician.

Serving Size & Timing

It is suggested that N-Acetyl L-Cysteine be taken in serving sizes of 600mg up to three times per day, or as directed by a physician.


This N-Acetyl L-Cysteine supplement is considered pharmaceutical grade and has no fillers of any kind present in it.


As long as suggested serving sizes are adhered to, this product is considered safe. However, if you are taking nitroglycerin or any medications that affect the heart, a medical professional should be consulted beforehand. It is also possible that NAC may block insulin, which means that diabetics are cautioned from taking this supplement.

If taking more than the recommended amount, side effects such as vomiting, nausea, headache and gastrointestinal pains may be experienced from use of this supplement. However, these side effects are quite rare. Taking a larger amount of one supplement may cause the absorption of other supplements to be less effective; it is important to supplement other minerals such as copper and zinc to make up for what is being lost.


This product is water soluble and has a bit of a sour flavor. It can be mixed with either water or juice. If the sourness of the supplement is too much to handle, it may be purchased in capsule form. Of the many forms of Cysteine, N-Acetyl L-Cysteine is easily the most bioavailable. It should be stored in an area that is free from light, heat and moisture.


Due to varying import regulations, not all of our supplements are available to international customers. This product is restricted for sale in the following countries:

  • Germany
  • Netherlands
  • Sweden

There is no guarantee of specific results and results can vary.

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.

California residents: Click Here for Proposition 65 warning.

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Michelle H.
United States United States

Why I use it

My psych Dr said this is fda approved for use in helping people who pick their skin to stop or slow down on picking their skin. So I've been taking 1 pill in the morning and 1 in the a*ternoon. I see a slow progress with myself.

Amazon C.


Very easy to take, feeling better and sleeping better

sean n.

Great product

So many uses at a great price. It is acidic to the point of potentially damaging your teeth if drank straight without too much water.


I was very happy to find a powdered form of NAC.

I was very happy to find a powdered form of NAC.



What can I say, I LOVE every product this company makes. Clean, excellent supplements. As a previous supplement store owner & GNC management for 9 years, this is one of the best!

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