Last update
3/16/2026
Reviewed By
Overview
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 8 Reviews
8.1
Supplement Facts
Serving Size: 1 Capsule
Amount Per Serving
%DV
N-Acetyl-L-Cystein
500 mg
†
Most Useful Reviews
7.5
Thins mucus effectively
42 people found this helpful
I like this product and appreciate that Jarrow makes it. It significantly helps with my severe allergies. When pollen levels are high and I'm congested, NAC effectively opens my breathing by thinning mucus. The sustained-release formula works well for me, while the regular version does not. Although it can have side effects like mild nausea, I find it best taken with vitamin C. It's also important to stay hydrated, as NAC can remove both detrimental and beneficial minerals from the body.
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9
Eliminates allergy pills
38 people found this helpful
One of the most significant supplements out there. This brand is remarkably effective! It alleviates my arthritis from years of dancing and completely removes my allergies—I've stopped using allergy pills. As an asthmatic, I rarely require my steroid inhalers anymore. NAC is even prescribed in hospitals in Europe for its benefits. While I'm aware that it reduces inflammation and helps with other autoimmune issues, it has also been beneficial in treating my eczema, which surfaced after the Malibu fires two years ago.
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8
Natural allergy relief
15 people found this helpful
Great product! I use this supplement along with Nature's Way Nettle leaf for year-round allergies. I take one of each every 6-7 hours and can definitely tell when they wear off. The side effects don't compare to those from OTC allergy medications. I'm committed to these more natural alternatives, especially considering they are approved for pregnancy. I knew I'd need allergy relief if I were to become pregnant, and these have been a vital addition to my routine.
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User Reviews
USERS' SCORE
Good
Based on 8 Reviews
8.1
- All Reviews
- Positive Reviews
- Negative Reviews
7.5
Thins mucus effectively
42 people found this helpful
I like this product and appreciate that Jarrow makes it. It significantly helps with my severe allergies. When pollen levels are high and I'm congested, NAC effectively opens my breathing by thinning mucus. The sustained-release formula works well for me, while the regular version does not. Although it can have side effects like mild nausea, I find it best taken with vitamin C. It's also important to stay hydrated, as NAC can remove both detrimental and beneficial minerals from the body.
Read More
9
Eliminates allergy pills
38 people found this helpful
One of the most significant supplements out there. This brand is remarkably effective! It alleviates my arthritis from years of dancing and completely removes my allergies—I've stopped using allergy pills. As an asthmatic, I rarely require my steroid inhalers anymore. NAC is even prescribed in hospitals in Europe for its benefits. While I'm aware that it reduces inflammation and helps with other autoimmune issues, it has also been beneficial in treating my eczema, which surfaced after the Malibu fires two years ago.
Read More
8
Natural allergy relief
15 people found this helpful
Great product! I use this supplement along with Nature's Way Nettle leaf for year-round allergies. I take one of each every 6-7 hours and can definitely tell when they wear off. The side effects don't compare to those from OTC allergy medications. I'm committed to these more natural alternatives, especially considering they are approved for pregnancy. I knew I'd need allergy relief if I were to become pregnant, and these have been a vital addition to my routine.
Read More
8
Improves allergy symptoms
12 people found this helpful
Great for Lupus and allergies. I wasn’t warned about the smell—it’s like rotting eggs due to sulphur—but the health benefits are remarkable. After hearing about NAC's advantages for those with Lupus and Sjogren's Syndrome, I purchased it. It claims to improve liver, kidney, and lung functions, along with having decongestant properties. Since I started taking it in the morning, I’ve noticed a significant improvement in my allergies.
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7.5
Relieves sinus issues
9 people found this helpful
It seems to work. This product appears to have helped alleviate my seasonal sinus allergies. I ran out for a week and noticed a runny nose and chest congestion returning. After resuming it, those symptoms cleared up. I cannot say for certain that this product is solely responsible, but these have been my results with a daily dose of one pill.
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Frequently Asked Questions
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