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NAC N-Acetyl-L-Cysteine - Promotes Cellular Health, Immune & Antioxidant Support - 600 MG (50 Capsules)

NAC N-Acetyl-L-Cysteine - Promotes Cellular Health, Immune & Antioxidant Support - 600 MG (50 Capsules)

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NAC N-Acetyl-L-Cysteine - Promotes Cellular Health, Immune & Antioxidant Support - 600 MG (50 Capsules)

Rated 4.1 out of 5
80 Reviews|22 Questions | 208 Answers|
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Gluten FreeSugar FreeDairy FreeSoy FreeTree Nut Free

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About This Product

  • Promotes cellular health
  • Offers immune and antioxidant support
  • Free of gluten, dairy, soy, nuts, sugar, salt, preservatives, and artificial colors or flavors

NAC, or N-Acetyl-L-Cysteine, is a source of the essential amino acid L-cysteine—a precursor to the antioxidant glutathione. NAC is believed to help support cellular health and the immune system.

These once-daily capsules are both convenient and easy to incorporate into your daily wellness routine.

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Directions

Take one (1) capsule daily, preferably with a meal.

Warning

Consult your healthcare provider prior to use if you are pregnant, nursing, taking any medication or have any medical conditions. Store in a cool, dry place. Keep out of reach of children. Tamper evident. Do not use if outer seal is broken or missing.

Updated Jan 15, 2026
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Serving Size: 1 Capsule
Number of Servings: 50 Servings
Amount Per Serving
% Daily Value
N-Acetyl-L-Cysteine   
N/A*

Other Ingredients:

Gelatin, magnesium stearate (vegetable source), silicon dioxide, rice flour.

Does Not Contain:

Preservative Free, Free of Artificial Flavors, Free of Artificial Colors

Brand:
the Vitamin Shoppe
Form:
Capsules
Strength:
600 MG
Serving Size:
1 Capsule
Number of Servings:
50 Servings
Price per Serving:
($0.28 / serving)
Product Weight:
2  OZ
Allergens:
Soy Free, Tree Nut Free
Specialty Diets:
Gluten Free ,  Sugar Free ,  Dairy Free ,  Salt Free
Item # :
VS-1294 / 1044088
80 Ratings
4.1out of 5 stars
80 Ratings

Rated 5 stars by 71% of reviewers

Rated 4 stars by 2% of reviewers

Rated 3 stars by 9% of reviewers

Rated 2 stars by 1% of reviewers

Rated 1 star by 16% of reviewers

Would you recommend?
1-10 of 80 Reviews
Customers talk about
Oct 4, 2026
Rated 1 out of 5
Soon to Expire
Bottle was set to expire in 3 months. Very poor business inventory. Always check the dates. I'd give this zero stars but it's not an option.
Rae Jo EVerified Purchaser
Purchased on Sep 12, 2026
Was this helpful?
Apr 3, 2026
Rated 5 out of 5
Good stuff
Works like it should.
John DVerified Purchaser
Location
CA, US
Gender
Male
Age Range
55-64
Would you recommend?:Yes
Purchased on Mar 19, 2026
Was this helpful?
Feb 28, 2026
Rated 5 out of 5
Works well
When taken with other sister supplements this seems to work well. I've been taking it for years and don't plan to stop. The capsule doesn't seem to upset my stomach like some do either.
Stacia RVerified Purchaser
Location
Aurora, CO, US
Gender
Female
Age Range
45-54
Would you recommend?:Yes
Purchased on Nov 1, 2024
Was this helpful?
Feb 7, 2026
Rated 1 out of 5
VShoppe Expiration Bad Practice
Vitamin Shoppe, what's going on? You keep sending me expired NAC and try to cover it up with ghetto stickers that show a newly printed expiration date. This is just bad practice.
Jonathan U
Would you recommend?:No
Was this helpful?
Jan 13, 2026
Rated 1 out of 5
Original Expiration Dates COVERED OVER with NEW STICKERS and NEW DATES
It MIGHT BE A GOOD PRODUCT, but Vitamin Shoppe sent me EXPIRED BOTTLES, WITH STICKERS COVERING OVER THE ACTUAL EXPIRATION DATES. The stickers had NEW EXPIRATION DATES, that JUST HAPPENED TO BE EXACTLY 1 YEAR AFTER THE REAL EXPIRATION DATES THAT WERE STAMPED ON THE BOTTLES. How do you think that happened?
Frank GVerified Purchaser
Location
Boston, MA, US
Gender
Male
Age Range
35-44
Would you recommend?:No
Purchased on Dec 10, 2025
Was this helpful?
Jan 1, 2026
Rated 2 out of 5
Please post all reviews
I left my review on the 200 count NAC - it never got posted - it won't allow me to leave another there as it states I already left a review - yet someone that left a shining review after mine got posted. Sad really sad. Pointless
THERESA H
Location
CA, US
Gender
Female
Age Range
65+
Was this helpful?
Jan 1, 2026
Rated 5 out of 5
Bad reviewers got it wrong!
For the reviewers complaining about the smell...it's SUPPOSED to smell!!! A sulfur or rotten egg smell. They aren't expired or rotten. If they don't smell, than you're not getting cysteine, you're getting cystine. Not the same.
Salvador D
Location
Las Vegas, NV, US
Gender
Male
Age Range
55-64
Would you recommend?:Yes
Was this helpful?
Dec 29, 2025
Rated 3 out of 5
Expiration dates not always accurate
It's good when the expiration date is good
I believe it gets foul smelling when it's old - like oxidation.
For some reason lately noticed labels with a year or 2 are added to modify the expiration date on the bottom of the bottles. I know I sure wouldn't want that to happen with my prescription meds - wouldn't want it done on anything I ingest. I only try and purchase those without a modified date.
THERESA H
Location
CA, US
Was this helpful?
Nov 19, 2025
Rated 5 out of 5
NAC works to combat viruses
NAC works to combat viruses
John LVerified Purchaser
Location
Farmingdale, NY, NY, US
Gender
Male
Age Range
45-54
Would you recommend?:Yes
Purchased on May 2, 2025
Was this helpful?
Oct 5, 2025
Rated 5 out of 5
Great Find!
Excellent support with so many benefits!
Susan V
Location
RI, US
Gender
Female
Age Range
65+
Would you recommend?:Yes
Was this helpful?
Disclaimer:

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of the Vitamin Shoppe. Vitamin Shoppe does not verify or endorse any claims made in these reviews.Please read the full product reviews disclaimer.

We'll email them your question, then email you their replies.

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Start typing and see existing answers.
3 Questions
Why did you choose this?
The Vitamin ShoppeStore

Lung health

Khaleal G

NAC helps my breathing and sinus issues

Norma U

To get the antioxidant benefits.

Edson B

Combine with Quercetin for cold and flue protection

Bill L
How big are the capsules?
A shopper
Where is this manufacture?
A shopper
Questions for Similar Products
Can I take nac that's been expired for a year? Will it be less effective?
NAC N-Acetyl-L-Cysteine
About
NAC N-Acetyl-L-Cysteine
A shopper
Why does it have rotten egg smell?
NAC N-Acetyl-L-Cysteine
About
NAC N-Acetyl-L-Cysteine
A shopper
Disclaimer:

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of the Vitamin Shoppe. Vitamin Shoppe does not verify or endorse any claims made in these reviews.Please read the full product reviews disclaimer.

 

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5 Groups of People Who Could Benefit From More Amino Acids

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Which Pump-Boosting Amino Acid Is Better: L-Arginine Or L-Citrulline?

When it comes to fitness-boosting amino acids, BCAAs seem to get all of the attention. However, two other amino acids deserve some spotlight, too: l-arginine and l-citrulline. Here’s what you need to know about their unique benefits—and which to incorporate into your workout routine.

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