Page 1 - Reviews - Source Naturals, Activated Quercetin™, 200 Capsules - iHerb
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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorised distributors.Show more
4.7
Based on 1,773 ratings
1,436
232
73
16
16
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What customers say
(121)
 
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English (UK)
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English (UK)
Translated reviews
SarahK444
Silver
Posted on Mar 3, 2026
United States
197
0
0
57
Cold season
Verified Purchase
Great to add for immune support. This antioxidant helps with inflammation and detoxing when germs are spreading helps keep me feeling healthy & strong! No weird taste & trust this brand.
Auto-translated from English
iHerb Customer
Silver
Posted on Mar 19, 2026
United States
107
0
1
8
Good quality and dosage
Verified Purchase
Very happy with Source Natural brand for immunity and wellness support and quercetin is a part of staying healthy for me. Would recommend this product.
Auto-translated from English
iHerbCustomer
Silver
Posted on Dec 19, 2025
Belgium
245
0
3
119
Good composition
Verified Purchase
I buy many products every month, and it would be overwhelming to review them all individually. That's why I created this template. If you're reading this, it means I'm very satisfied with this product and that future buyers can buy with confidence. Of course, I'm not an irresponsible buyer; if the product isn't good, I'll also take the time to write a good review.
Auto-translated from Dutch
iHerb Customer
Posted on Nov 2, 2025
Bosnia and Herzegovina
38
0
0
4
Great!!!
Verified Purchase
This supplement comes in easy-to-swallow capsules, with each serving delivering 1 g quercetin plus bromelain, vitamin C and magnesium to support immune and seasonal balance. Good ingredient ! The packaging is straightforward and available in multiple sizes. Quality feels solid, and capsules have jo taste. Many benefits. So i recommend this quercetin.
Auto-translated from English
iHerb Customer
Posted on Aug 28, 2025
China
4
1
0
1
very good
Verified Purchase
Quercetin is a good portion, well-packaged, and of good quality. It's very effective for the respiratory system, and it's exactly what I need. 🟢 Function 1. Antioxidant Effect: Quercetin has powerful antioxidant properties, neutralizing free radicals and reducing oxidative stress, thereby protecting cells from damage. This helps prevent a variety of chronic diseases, including cardiovascular disease and certain types of cancer. 2. Anti-inflammatory Effect: Quercetin can inhibit the inflammatory response and reduce the release of inflammatory mediators, thereby alleviating inflammatory symptoms. This may be beneficial for relieving arthritis, inflammatory bowel disease, and other inflammatory conditions. 3. Antiviral Effect: Studies have shown that quercetin has antiviral properties and can inhibit the replication of various viruses, including influenza, hepatitis B, and certain coronaviruses.
Auto-translated from Chinese Simplified
iHerb Customer
Gold
Posted on Aug 20, 2025
Kazakhstan
1,191
1
0
54
Verified Purchase
, who prefer comfort in the off-season, can enjoy the great outdoors with confidence thanks to Activated Quercetin™, an advanced complex containing 1,000 mg of quercetin per serving. This unique bioflavonoid has been shown in preliminary studies to inhibit histamine release and support a healthy inflammatory and immune response. Key additional ingredients such as pineapple enzyme bromelain, magnesium citrate and vitamin C activate and optimize the benefits of quercetin, as well as provide immune, respiratory and antioxidant support. Not all inflammation is due to disease-causing conditions. Inflammation is the body’s healthy immune response.
Auto-translated from Russian
iHerbCustomer
Silver
Posted on Apr 4, 2026
Kazakhstan
138
0
10
8
Verified Purchase
Excellent quality, immediate effect, and the capsules smell delicious due to the bromelain. They have a sour taste and are large.
Auto-translated from Russian
GabiCarballeda
Posted on Feb 4, 2026
Brazil
21
2
0
1
Verified Purchase
I'm a Source Naturals fan. I'd buy any product from the brand without hesitation.
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iHerb Customer
Posted on Oct 21, 2025
Spain
84
0
0
11
Good product
Verified Purchase
I use quercetin for its immune benefits, and more specifically for seasonal allergies. It helps my respiratory tract feel better. It's also an antioxidant and helps control inflammation. It's a great size for long-term use and avoiding buying multiple bottles. I'll continue using it during the spring.
Auto-translated from Spanish
iHerb Customer
Posted on May 28, 2026
United States
75
46
1
71
outstanding
Verified Purchase
This is my first purchase. It works very well to prevent colds, the quality is good, and it doesn't have any strange smell. Highly recommended!
Auto-translated from Chinese Traditional