Customer Ratings & Reviews

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4.8
Based on 47,010 ratings
40,561
4,538
1,408
263
240
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What customers say
Customers generally praise the NAC supplement for its quality, effectiveness, and ease of use. Many highlight its benefits for immune support, liver detoxification, and overall well-being. Users report feeling better with more energy and improved respiratory health, particularly during allergy seasons. The product is noted for its simple ingredients and proper packaging. Some customers use it in conjunction with other supplements like d-mannose for specific health issues such as UTIs. While most reviews are positive, a few users did not notice significant changes or were uncertain about the product's impact. Fast shipping and reasonable pricing are additional appreciated aspects.
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Customer reviews (46,386)
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.
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Reviews from Ghana
Reviewer Country
English
Translated reviews
iHerb customer
Silver
Posted on Nov 25, 2025
Ghana
142
1
1
17
NAC with Selenium
Verified purchase
Best combined ingredients. Good for all the vital organs, liver, lungs and kidneys detox. Its key benefits include supporting liver and lung function, managing certain mental health conditions, and enhancing fertility. 
iHerb customer
Posted on Mar 13, 2026
Ghana
47
44
0
4
NAC 600 mg supports breathing and recovery after long days
Verified purchase
My wife has been taking this for the past few weeks. I chose this because of the selenium added and the 600 mg dose. With all the seasonal dust and vehicle fumes, her breathing can feel tight sometimes. This NAC helps keep her lungs clearer and facilitates faster recovery during such periods. No strong smell from the capsules, they go down easily, no nausea or anything, but it takes quite a bit of time to start seeing results. I notice her coughing issues have slightly improved. Non-GMO, vegetarian, good bottle size. It’s quite supportive—doesn’t feel like a stimulant —and helps the body clear things out. Reliable from NOW Foods. No strong aftertaste, and the ingredients are of good quality.
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iHerbCustomer
Silver
Posted on Nov 15, 2025
United States
204
0
2
140
Love this
Verified purchase
I’m really impressed with the quality of this NAC. The ingredients are clean, the capsules are a good size, and the package arrives sealed well every time. I use it to support my diet and overall wellness, and I can definitely feel the benefits. Great product and consistent results
iHerbCustomer
Posted on Nov 17, 2025
Bahrain
3
0
1
2
very nice product
Verified purchase
i used to go to hospital almost every month everytime i feel not good (i worked in a very smoky area). since i used this product for around a year now, i cannot recall when did i went last to the hospital because of flu or colds. this really helps me a lot.
jamesleon
Silver
Posted on Mar 30, 2026
Singapore
236
9
0
45
Effective for Fatty Liver and IBS
Verified purchase
This supplement offers excellent value, the ingredients are beneficial for managing my fatty liver. The packaging provides a two-month supply, and the capsule format ensures a neutral taste experience. It serves as an effective addition to my dietary regimen.
ee686b74-883b-42f6-b01f-be08e3e23fee
Cassy
Gold
Posted on Dec 30, 2025
385
7
0
224
Strong Antioxidant Support with NAC & Selenium
Verified purchase
The NOW Foods NAC with Selenium capsules are excellent in quality with a powerful ingredient combination that supports antioxidant health. The package of 100 capsules is generous and perfect for regular daily use. I’ve noticed real benefits in overall wellness and recovery with consistent frequency of use. The capsules are easy to take and gentle on the stomach, and this blend of NAC and selenium feels effective without any discomfort. If you’re looking for supportive nutrient supplementation with strong antioxidant properties, I highly recommend this product!
iHerb customer
Posted on Dec 5, 2025
Thailand
30
1
0
45
Helps with liver issue
Verified purchase
I have issues with my liver. So I started taking NAC daily. This one is a good quality one. The capsule size is quite big but not too difficult to swollow. It tasted and smell ok. Guess It benefits my in reducing oxidative stress in my liver. Package is good.
LustAndLuxury
Posted on Jun 7, 2025
Thailand
67
0
0
31
Excellent quality and great value!
Verified purchase
I’ve been taking this NAC supplement for a couple of months now and it’s become a must-have in my stack. Helps me with overall detox, better energy levels, and I feel my respiratory system is much clearer especially during allergy season. The capsules are easy to swallow and you get a big bottle with great value for money. Highly recommend for anyone looking to support liver health and overall wellness.
Menyawe
Posted on Jun 1, 2025
Saudi Arabia
50
0
0
7
Excellent
Verified purchase
Supports detoxification and boosts immune health. NAC helps replenish glutathione, a key antioxidant, while selenium enhances antioxidant defenses and promotes thyroid health. The capsules are easy to swallow and suitable for daily use. Users appreciate the quality, effectiveness, and value of this product. It’s an excellent choice for those looking to support liver function, respiratory health, and overall wellness naturally. Highly recommended for a reliable antioxidant boost.
iHerbCustomer
Gold
Posted on May 5, 2025
United Arab Emirates
899
23
5
292
Good
Verified purchase
I’ve been ordering from iHerb for over a year now and I’m always impressed! The quality of the supplements is top-notch, everything is well-packaged, and the delivery is faster than expected—even to Iraq. I especially love their variety of vitamins and skincare products. Totally recommend for anyone looking for trusted health brands!”