Swanson NAC N-Acetyl Cysteine, Helps Replenish Glutathione To Support Liver & Cellular Health, 100 Capsules
$18.19
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N-acetyl cysteine (NAC) has garnered positive feedback for its various health benefits, particularly in supporting respiratory health and immune function. Many guests have reported noticeable improvements in breathing, energy levels, and overall well-being after incorporating NAC into their daily routines. The product is praised for its affordability and ease of use, making it a popular choice for those seeking natural health solutions. However, some guests have raised concerns about the product's odor and effectiveness compared to other brands.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.7 out of 5 stars with 348 reviews
5 out of 5 stars
16 May, 2026
originally posted on swansonvitamins.com
Highly recommend NAC for daily immune support
I learned about the advantages of taking NAC during the COVID19 Era. It was suggested as preventative and also treatment for viruses by an Integrative Health Clinic. I have found that it does a great job in supporting my immune system and I love the ease of using a subscription and the price!
5 out of 5 stars
11 May, 2026
originally posted on swansonvitamins.com
NAC Helps Clear Lungs!
Great help for my respiratory problems! I have been taking in am, but might also take in pm!
4 out of 5 stars
25 April, 2026
originally posted on swansonvitamins.com
A bit early to tell but seems like a winner
It seems to be helping. I don't really know yet. I guess we will see. I do notice a difference in how I feel if I miss a couple of days of them though.
5 out of 5 stars
22 April, 2026
originally posted on swansonvitamins.com
Helps my COPD
I have COPD and I have been taking NAC for years to help my breathing. In addition to being a strong antioxidant, it helps to clear out the mucus that clogs up the lungs and airways, and it has definitely improved my breathing.
5 out of 5 stars
21 April, 2026
originally posted on swansonvitamins.com
(no review title)
great products noticed a difference really fast don't usually notice it that fast with supplements
5 out of 5 stars
14 April, 2026
originally posted on swansonvitamins.com
(no review title)
Such an important supplement, after reading up on it, it’s one we both take daily
5 out of 5 stars
7 April, 2026
originally posted on swansonvitamins.com
(no review title)
Clean product and it’s easy to swallow, all at a very reasonable price. NAC is a precursor to the production of glutathione within the body, which is a potent antioxidant and aids many metabolic processes.
5 out of 5 stars
24 March, 2026
originally posted on swansonvitamins.com
Use
My chiropractor suggested that I started product, about three years ago. The significant improvement with asthma symptoms. Good product. Do your research.
5 out of 5 stars
17 March, 2026
originally posted on swansonvitamins.com
NAC
Helps with my energy needs but I will have to eventually stop using it the price is just too much
5 out of 5 stars
16 March, 2026
originally posted on swansonvitamins.com
NAC has many benefits
Clarity, focus returns as it lifts brain fog...NAC is a powerful antioxidant that removes environmental toxins and heavy metals from your system. Do your own research. It has many health enhancing benefits.Swanson has always provided quality and the best value for this supplement.
1 out of 5 stars
15 March, 2026
originally posted on swansonvitamins.com
What is in these capsules?
I don't know what is inside these capsules, but it is not N-Acetyl Cysteine (NAC). If you read any articles or reviews about NAC, you will notice that many of the comments mention the sulfurous odor. This is because it has a sulfur base, it's a natural odor. When I opened the bottle of Swanson NAC, there was no odor at all. I even opened a capsule and smelled the powder, nothing. I tried crushing the powder, still no odor. If this is Swanson's idea of quality control, I'll buy all my supplements elsewhere.
2 out of 5 stars
21 February, 2026
originally posted on swansonvitamins.com
The Proper NAC
There are several doctors who discuss the respiratory benefits of this product on You Tube. So I decided to purchase two bottles of the Swanson brand. I was very disappointed. I had taken one whole bottle, and saw No difference. The doctors state how you know it is a good brand, it should have a smell of rotten eggs. This brand had no smell. Tried a different brand, it had the rotten egg smell, and you could tell the difference immediately. The stronger brand, you could not take on an empty stomach. I took two of the Swanson brand and I didn't notice any difference.
3 out of 5 stars
31 January, 2026
originally posted on swansonvitamins.com
Should smell like Sulfur
I don't know. It's my understanding that for the NAC to be potent, the supplements should smell like sulfur. These do not smell. I learned that after buying these, but I recall reading reviews of products about the smell. I don't see them for this one. Also, I haven't noticed an improvement in my mucus issues.
5 out of 5 stars
28 January, 2026
originally posted on swansonvitamins.com
Would buy again
As usual the Swanson affordability makes this a good buy. Haven't felt any side effects thus far.
5 out of 5 stars
13 January, 2026
originally posted on swansonvitamins.com
Must have if you take acetaminophen
My doctor recommended this because of my daily acetaminophen use. After just one month of taking NAC, my kidney numbers looked so much better than before!
5 out of 5 stars
13 December, 2025
originally posted on swansonvitamins.com
NAC for respiratory support
Great product, and helpful for respiratory issues., especially during the fall/winter.
3 out of 5 stars
13 December, 2025
originally posted on swansonvitamins.com
NAC for Anxiety Reduction
I took NAC for 6 months as an off-label anxiety reducer as recommended by my doctor. Unfortunately, it didn't help me in the way my doctor and I were hoping, but hopefully it works for someone else!
5 out of 5 stars
13 December, 2025
originally posted on swansonvitamins.com
NAC great, taken daily, keeps bugs at bay!
NAC is great at keeping the bugs at bay, taken daily, & it's not too pricey. IF you do succumb to some bug, then get beta glucan, if you can (it costs a bit more, but worth 'getting better")
5 out of 5 stars
12 September, 2023
originally posted on swansonvitamins.com
Former Firefighter Recommended. Works great, could save lives.
As a former volunteer firefighter/EMT that still smokes (organic) tobacco cigarettes, I love NAC for a multitude of it's benefits. Works great for me, great value, protects my families health. Lots of research out there proving why some interests try to ban it.... but we see through the lies and illusions. No downsides for me personally, all benefits, would recommend to almost anyone.
2 out of 5 stars
29 January, 2023
originally posted on swansonvitamins.com
Didn't work for me
My psychatrist suggested taking this to help resolve my issues with skin picking. This supplement isn't for me. I tried taking it for a few days and broke out in an itchy rash on my wrists, ankles, chest, back, and shoulders. After some weeks, I decided to give it a second try and the same thing happened.