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Swanson Premium

NAC N-Acetyl Cysteine

Swanson $6.99
Retail $12.49
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Caps Size:
O, Pill Size Guide
600 mg 100 Caps

"The clinical, double-blind published research on the benefits of this supplement is remarkable. I take 4 capsules per day, 6 days a week, and Swanson's is not only the best in quality, but it's the best price too." ~product review by RosieG

  • Terrific free radical defender that won't dent your pocketbook

  • Powerful antioxidant amino acid

  • Supports liver health

When free radicals attack, fight back with NAC! As a powerful antioxidant amino acid, Swanson NAC (N-acetyl cysteine) is an important weapon in the war against free radicals. NAC helps replenish glutathione, a critical component of the body's defense system. It supports liver health and much more.


Q: Does n-acetyl cysteine have an odor?
A: N-acetyl cysteine (NAC) is a derivative of the non-essential sulfur-containing amino acid cysteine. Sulfur has an unpleasant odor commonly described as rotten egg smell. Some batches smell stronger than others.

Product Label

Supplement Facts

Serving Size 1 Capsule

  Amount Per Serving % Daily Value
N-Acetyl-Cysteine (NAC) 600 mg *

*Daily Value not established.

Other ingredients: Gelatin, magnesium stearate.

Suggested Use: As a dietary supplement, take one capsule per day with water or as recommended by your healthcare provider.

WARNING: Do not take this product if you are pregnant or nursing. Consult your healthcare provider before use if you are taking any prescription medication or if you have a medical condition. Discontinue use if you experience gastrointestinal discomfort.

Terms and Ingredient Definitions

Swanson Premium NAC N-Acetyl Cysteine Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

NAC N-Acetyl Cysteine 4.8 5 70 88
Great Buy This is a supplement that I take every day, so for me it is a great buy. March 19, 2014
NAC I can breath better during workouts since starting to take NAC two years ago. Two of the many benefits of NAC include replenishment of glutathione as well as protection of the liver. March 3, 2014
Top choice for NAC I have bought these supplements as gifts for so many friends, and recommend it to everybody I know. NAC is proven to boost glutathione production and it is an incredible antioxidant. The clinical, double-blind published research on the benefits of this supplement is remarkable. I take 4 capsules per day, 6 days a week, and Swanson's is not only the best in quality, but it's the best price too. January 27, 2014
protect your liver! I will never be without this product. My kidneys and liver are healthier because of this product. It helps to move the toxins out of your system. Cleaning out your liver and kidneys that filter everything out of your system. (in my opinion) December 25, 2013
this is trully a natural energy product, in some of my students and in my self it has also stimulated more valve movements, I recomend this product as a very natural product, forget the 5 hour stuff, that gave me the gitters and and down when it wore out. December 20, 2013
Great product great price I am a new customer and I am very pleased with the quality of the service, great products, and of course the low prices. It is good to know you can save money without sacrificing quality. December 1, 2013
Good price Just recently started using at recommendation of Functional Medicine doctor. Hoping it is able to help the reason for starting. Great price. November 25, 2013
Great Product A great building block for energy - it really helps me November 18, 2013
Most effective and best value The Swanson Premium NAC has proven itself to be of consistent quality and more cost-effective than some competitor products. Overall, this Swanson Premium supplement, along with ALA, have made a bigger impact on my health than versions tried from competing companies when comparing for dosage. November 14, 2013
happy I was very happy with the fast shipping and quality of the product November 10, 2013
I am extremely happy with this product. The price is right. It is very convenient ordering from this site, no need to even go to the store. The site is also very easy to navigate. I would absolutely recommend this product and purchasing directly from swanson for anyone thinking about making a purchasing. September 17, 2013
Did not notice any difference I really did not notice any difference while taking this. I gave it a mostly average rating though because I'm not sure I would have noticed a difference and because I didn't see any side-effects either. It's easy enough to take. September 11, 2013
great but short half life This is a great product except that it should have been made timed release, because NAC has a short half life September 6, 2013
Best NAC so far I tried other brands of NAC and have come back to Swanson. I can actually tell a difference. I also do not have any difficulties swallowing and after taste. Product seems more potent than two others I have tried making the cost even better. August 13, 2013
Liver detox helper My MD has me taking it for liver support and according to her it has been effective for that purpose. August 12, 2013
NAC Great glutithione booster which is essential for healthy immune function. August 7, 2013
Great value, convenient Shipped fast and very convenient, and was a great deal! July 24, 2013
NAC starting to upset my stomach. will try the pure pharmaceutical next. July 4, 2013
Great product Great quality at a good price. I am satisfied. June 7, 2013
Glutathione precursor I've been using this for years as a glutathione booster for liver health. Glutathione is a powerful antioxidant. The liver is the center for many functions. May 30, 2013
Essential Detoxifying Agent NAC has powerful antioxidant abilities. Swanson's brand is nice quality at a good price. I am satisfied. May 28, 2013
Great value Swanson NAC is a great value compared to other stores and sites. It's quality and effectiveness are equal to other brands. May 15, 2013
Great Value We have been taking alot of Swanson's Brand for atleast a decade and I will always trust their brand. April 28, 2013
A little faith There are some products that I take on faith as the effects are so subtle as to not be easily noticed. However, I am confident in the research behind the effectiveness of this product and attribute my excellent health in part to a daily regimen that includes NAC. April 12, 2013
seems ok this was a highly recommended product for me so i take it but not sure exactly how it is helping me. April 9, 2013
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Countries with restrictions on this product:

  • Sweden

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