Your Cart is Empty
But it doesn't have to be.
Continue Shopping.
Added to Cart
Cart Total:
Customers Also Bought:

Metabolic Maintenance, NAC, 600 mg, 60 Capsules

Our Price:
Earn 5% Loyalty Credit ?

Sorry, this product is no longer in stock.

This product is already in your Wish List.

View Wish List

This product is now in your Wish List.

View Wish List
In Stock
  • Expiration Date: Jun 2018
  • Shipping Weight: 0.59 lbs (0.27 kg)
  • Product Code: MBM-00150
  • UPC Code: 838287001508
  • Package Quantity: 60 Capsules
  • Dimensions: 3.9 x 2.1 x 2.1 in, 0.35 lbs (0.16 kg)
Product Overview


  • Dietary Supplement
  • Manufactured in a GMP Compliant Facility

N-Acetyl Cysteine (NAC), known as a mucolytic agent, is a specially modified form of the dietary amino acid cysteine. There is no daily requirement for NAC, and it is not found in food. NAC taken orally helps support normal production of the important antioxidant glutathione.

Suggested Use

One (1) capsule daily, or as directed by a healthcare professional.

Other Ingredients

Vegetarian cellulose capsule

Gluten and excipient-free


Caution: Pregnant or lactating women, consult your healthcare professional before taking this product.

Keep tightly closed in a cool, dry place, out of the reach of children.

Supplement Facts
Serving Size: 1 capsule
  Amount Per Capsule % Daily Value
N-Acety-L-Cysteine 600 mg *
* Daily Value not established for this ingredient
iHerb Customer Reviews

Supposedly good, but can't tell an affect

Posted by aaronash on Dec 13, 2015

NAC is supposed to be great, but I'm so messed up I'm afraid I haven't been able to tell a difference.

Verified Purchase

Was this review helpful to you?

Great product for chronic fatigue

Posted by 5532808657491600719 on Jul 25, 2015

I have suffered with chronic fatigue and shortness of breath for over twenty years I take two in the morning and one in the afternoon can't believe what a difference it has made I can now get out of bed and actually accomplish things so glad I am using it

Verified Purchase

Was this review helpful to you?

Increased energy

Posted by Reviewer3175778 on Sep 11, 2014

This was recommended to me by my doctor to help with fatigue. I take 2 capsules a day and find it very beneficial.

Verified Purchase

Was this review helpful to you?

Finally, one I can use!

Posted by 5306663974144777526 on Jun 10, 2014

I bought this based on the first review because I had not found an NAC I could tolerate and this one did not have anything in it that is problematic for me. Yes, it's more expensive than the others, but I am glad I got it, as it's the only one that I seem to tolerate out of all the ones I have tried. A big thank you to the person who wrote the other review and said what the difference was with this product. My doctor wanted me to take 600 mg once a day, and now I'm glad that I can!

Verified Purchase

Was this review helpful to you?

Comment on manufacturing of NAC

Posted by Reviewer2811589 on Mar 09, 2014

Internet sources indicate that most NAC is manufactured in China using cysteine from animal protein, mostly through the hydrolysis of human hair or poultry feathers. I contacted Metabolic Maintenance to inquire about the manufacturing source of their NAC. While they would not identify the exact manufacturer, they did say that it was manufactured in Japan by synthesis (ie. not from human hair or feathers). This may explain why NAC of other brands costs less than that from Metabolic Maintenance. Because of this and because Metabolic Maintenance does not use any fillers in their NAC product, I prefer this brand for NAC.

Verified Purchase

Was this review helpful to you?