Your Cart is Empty
But it doesn't have to be.
Continue Shopping.
Added to Cart
Combo Discount:
View/Edit Cart Checkout
Cart Total:
Customers Also Bought:

Source Naturals, N-Acetyl Cysteine, 1000 mg, 120 Tablets

By Source Naturals

Our Price:
You Save:
$20.23 (46)
  • Volume Discount
  • Buy 4+
    Save 5%
Earn 10% Loyalty Credit ?

This product is already in your Wish List.

View Wish List

This product is now in your Wish List.

In Stock
  • Product Code: SNS-00170
  • UPC Code: 021078001706
  • Package Quantity: 120 Tablets
  • Dimensions: 2.6 x 2.6 x 4.6 in, 0.5 lbs (0.23 kg)
Bundle Offer
Save $6.10 when you purchase these items today for only $26.60


Combo Discount:



- $6.10


Product Overview

  • Dietary Supplement
  • Antioxidant Support

N-Acetyl cysteine is a stable form of the sulfur amino acid L-cysteine, and is a powerful antioxidant. It is also a precursor of glutathione, a major antioxidant. Glutathione is activated by the selenium-containing glutathione peroxidase, one of the most important antioxidant enzymes in the body. N-Acetyl cysteine is better than glutathione supplements, which may break down during digestion and lose potency.

Suggested Use

1 to 2 tablets daily.

Other Ingredients

Dibasic calcium phosphate, stearic acid, modified cellulose gum, colloidal silicon dioxide, and magnesium stearate.

Hypoallergenic: Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.


Keep tightly closed in a cool, dry place.

Do not use if you are taking any form of prescription nitrate such as nitroglycerin. If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Visit Manufacturer's Website
Supplement Facts
Serving Size: 1 Tablet
  Amount Per Serving %DV
Calories 5  
Calcium 58 mg 6%
N-Acetyl Cysteine 1 g
†Daily Value not established.

iHerb Customer Reviews

5 Stars
4 Stars
3 Stars
2 Stars
1 Stars

Cured my horrible 4 months cough

Posted by 5040988076438410898 on May 27, 2016

I had a cold that just would not yield from Christmas to April. I was on antibiotic (doxycycline) for 2 weeks during this time when the cold vanished. As soon as I got off the antibiotics the cold came back with vengeance. I had actually ordered this stuff for my dad who has early parkinson's disease so I popped a pill of 1000 mg N-acetylcysteine just to show him that it is safe to take. Within an hour I started to cough up phlegm like there was no tomorrow. It felt as if I coughed up stuff from my throat that had resided there for years. Anyway, I went to bed and woke up cured from my cold. AMAZING! I decided to keep taking it to make sure the cold/cough did not return. It didn't. I have kept taking it since then. My dad also takes 2 per day (morning and night) along with his parkinson's medication (dopamine) and he has become much less fatigued with this supplement - he felt a difference on day 2.

Was this review helpful to you?

To early to tell

Posted by 4914116887331997861 on Jan 12, 2015

Easy to swallow tablets. Only been on for less than 8 weeks.

Was this review helpful to you?


Posted by 5683875262352729167 on Dec 26, 2014

Postage was super fast! Ordered twice now and both were easy transactions. Would buy again.

Was this review helpful to you?

Too early to tell

Posted by 5693580305384162443 on Aug 21, 2014

I am using this product as a supplement for my prescription psych. pills. It takes 2-3 wks to tolerate it, I have had no problems but 2-3 months to see if it works, far too early to tell but I hold hope. I will buy again from your site and run a 2nd course through. Your postage, price were both excellent. Thank you

Was this review helpful to you?

good $$

Posted by 5554583586952000996 on Jun 27, 2014

good price but somewhat large tablet that can be a little sticky to swallow at times

Was this review helpful to you?

See All Reviews