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4.8
Based on 4,757 Ratings
5 Stars
4,108
4 Stars
525
3 Stars
90
2 Stars
18
1 Stars
16

4.8
Based on 4,757 Ratings
5 Stars
4,108
4 Stars
525
3 Stars
90
2 Stars
18
1 Stars
16

Most helpful positive review

Posted on Jan 25, 2021
238
12
0
5,574

N-Acetyl-L-Cysteine ​​stimulates the production of glutathione - a tripeptide formed in the body of three amino acids (glutamic acid, L-cysteine ​​and glycine), which is extremely important for the body because it ensures the proper functioning of cells in the body and supports the activity of the immune system. Glutathione is a powerful antioxidant, immunomodulator and detoxifier, it stimulates the natural processes of detoxification and protects cells from oxidative stress and from serious damage caused by free radicals.

Global reviews (4,757)

Product reviews solely reflect the views and opinions expressed by the contributors and not those of iHerb. iHerb does not verify or endorse any claims made in these reviews. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Show more
Posted on Jun 20, 2022
107
0
0
66
Verified Purchase
Rewarded Review

LOVE NAC and its SO good for the body...funny how the FDA want to ban it, seems a bit convenient for big pharma to want to stop a product that keeps peoples bodies functioning well. I hope that iherb continue to sell this wonderful supplement that helps so many people.

Posted on Mar 6, 2023
5
0
0
3
Verified Purchase
Rewarded Review

I started taking Natural Factors NAC after an Xray when I noticed I had become sensitive to EMF's. My EMF sensitivity symptoms decreased and I noticed also that I was less sensitive to chemicals as well after adding this supplement to my regimen. After reading the other reviews I realize that the NAC was helping to clean my liver which is why I was becoming less sensitive to toxins in general. I take two capsules every day. One at night before bed with a Vitamin C tablet and one in the morning before breakfast again with Vitamin C. This is what was suggested to help with my EMF issues. I can see now that it also helps with lung issues and I have had a chronic cough which appears to have also now resolved. I buy almost all my supplements from iHerb as the quality, service and value is unmatched and usually the delivery is free even to Australia. Because of the effectiveness of the capsules I am confident that they are made from the best ingredients. And the size of the capsules makes them easy to swallow.

Posted on Dec 11, 2022
67
0
12
161
Verified Purchase
Rewarded Review

Natural Factors is a trusted brand, and I've been buying their products for years. This is the first time I've ever taken NAC, & no joke, I really do notice a difference in my breathing, even though I'm not taking it for that. I'm taking NAC as an antioxidant coz I have to be on long-term antibiotics. I didn't even know that it's known to help lung/breathing issues. I really do feel that my breathing is easier and clearer while taking these.

Posted on Dec 4, 2022
37
0
7
55
Verified Purchase
Rewarded Review

May protects ur lungs & liver from free radicals, especially good for smokers. may removes oxidative stress, may help respiratory issues, & improve lung function. i take it for all of the above & seen change, dont take everyday or you will get diarrhoea. i take b4 bed. if you like my review plz click on thumps up .

Posted on Nov 30, 2022
3
0
0
5
Verified Purchase
Rewarded Review

I personally like the quality of this brand over others. The larger size is a great deal since I use this consistently for nootropic benefits. For me personally, I take 2000mg (2 in the morning and 2 at night) for helping intrusive thoughts and calming mood swings. Sometimes I'll take a break from it for a week, but I can always tell an improvement in my mental health when I start taking it again.

Posted on Nov 2, 2022
126
0
1
24
Verified Purchase
Rewarded Review

First time buying NAC from Natural Factors and I must admit I am impressed with this product. Great quality and high grade ingredients. Decent size too (90 vegan capsules) and just the right dosage (500mg) . I use it during flu season as an antioxidant for my lungs. Also good for flu to protect the lungs.

Posted on Sep 30, 2022
13
0
0
35
Verified Purchase
Rewarded Review

NAC was on the list of supplements a herbalist gave me to protect myself from Covid, as I was not wanting the vaccines on offer. Since then I'm taking NAC every day. I have emphysema in the first stage. NAC is clearing up my lungs and bronchi like nothing else I tried before. It's making me a bit nauseous when taken on an empty stomach, so I take it after eating and it's fine. That's also why I use the 500 mg, I take 2 a day in separate doses. I highly recommend it.

Posted on Aug 9, 2022
16
0
0
8
Verified Purchase
Rewarded Review

Natural Factors creates a good quality NAC that I have relied on for years. NAC is one of those 'superpower' supplements. It helps protect the liver when you have to take Tylenol, it helps with breathing if you have Asthma, and it help you with blood sugar control if you have diabetes or are pre-diabetic. It is on my must have list, and I am almost always getting it from Natural Factors.

Posted on Jun 27, 2022
145
1
24
96
Verified Purchase
Rewarded Review

Great product. I do it two, or three times a course of 20 days to cleanse the liver of heavy metals and more. In the first days, the body emits an unpleasant odor, but this is only the beginning and is clearly cleansing. Do not mix it with alcohol or take it after drinking.

Posted on Jun 13, 2022
28
0
6
47
Verified Purchase
Rewarded Review

Cysteine is what I'm trying to get out of this supplement, but cysteine on its own is supposedly not as effective as NAC can be toxic when taken in higher doses. Thus, I take this N-Acetyl-L Cysteine. NAC is said to help rejuvenate levels of glutathione in the mitochondria. Glutathione is an antioxidant and is found in reduced levels in people with ME/CFS and MS. I take this alongside NADH and CoQ10 to help with inflammation, fatigue, and leaky gut/malabsorption. I'm not sure if it's helping my mitochondria since I can't ask them, but I hope that over time I'll see a more marked improvement in fatigue and exhaustion and be able to update more then.