Customer Ratings & Reviews

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4.9

Based on 61,568 ratings

54,663

5,159

1,325

264

157

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What customers say

(7,575)

iHerbCustomer

Gold

Posted on 14/04/2026

United Kingdom

369

229

Verified Purchase

I ordered it because I needed the 100 mg dosage and the selenium methionine form. The tablets are small. Selenium is a very important mineral.

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iHerb Customer

Gold

Posted on 21/11/2025

United Kingdom

582

Verified Purchase

I've been shopping at iHerb for a while now—the products are always excellent quality and delivery is fast! All items arrive securely packaged, fresh, and authentic. I really like the wide selection and clear product descriptions. Thank you iHerb for allowing me to order high-quality vitamins and supplements at great prices.

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Ghada

Posted on 31/01/2026

United States

153

Useful, useful, helpful

Verified Purchase

The quality is good, the ingredients and packaging are good, but I don't know. The quantity is large, enough for 100 days. It tastes good. Minerals, if you have a deficiency or symptoms, should take it after consulting a doctor. I didn't consult one myself, honestly, because I don't eat much egg or fish, and I need it for its benefits to my hair, health, and skin.

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nerumiko

Posted on 20/01/2026

Japan

Verified Purchase

My workplace was busy at the end of the year, and I was exhausted. Perhaps it was because I was postmenstrual? I developed a new skin condition I'd never experienced before, along with itching and atopic dermatitis-like symptoms. While researching through videos and other sources, I learned about Hashimoto's disease and hypothyroidism, and I wondered if it might be the cause. I decided to try taking selenium as a heavy metal detoxifier. (By the way, I have silver fillings, but I'm not sure if they're related.) Perhaps I had a significant buildup of heavy metals? As you can see in the photo, my condition improved dramatically. The itching completely disappeared, and I felt immediate relief. I was taking vitamins as part of my nutritional therapy, but the B group I was taking didn't contain selenium, so I think I was deficient. I also take selenium in combination with vitamin E and zinc, as they have a synergistic effect. For now, I'll take one pill a day until my skin condition is completely cured, and once it's resolved, I'll take it every other day to avoid excess. The three main causes of mercury accumulation are: 1) overeating large fish (such as tuna), 2) the material used in silver fillings (amalgam), and 3) vaccines (preservatives). Update: As of February, the photos are so much better! I've since added omega-3, silymarin for anti-inflammatory purposes, and copper, which acts as an antagonist to zinc. I'm also planning to add taurine in the future and see how my condition improves.

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iHerbCustomer

Posted on 26/06/2026

United States

Excellent selenium

Verified Purchase

Excellent selenium at an affordable price. I chose this brand because of its good reputation and high-quality ingredients. The tablets are small and easy to take, and the packaging lasts a long time. I liked that the product is yeast-free and suitable for daily use. Everything arrived well-packaged, with a fresh expiration date. A high-quality supplement at a great price. I'm completely satisfied with the purchase and will definitely order again.

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iHerbCustomer

Posted on 21/04/2026

Spain

Selenium

Verified Purchase

This brand boasts high quality, natural ingredients, minerals, high-quality packaging, and capsules that are usually a comfortable size and flavorless. I was prescribed selenium for my thyroid issues, and the frequency of administration varies from person to person. Since I have a micronutrient deficiency, this supplement and its ingredients are beneficial. Symptoms vary, and it's very difficult to determine whether you need this supplement by eye, which is why I recommend consulting a specialist before starting.

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Toleep

Silver

Posted on 31/03/2026

Oman

190

136

962

Distinguished

Verified Purchase

This high-quality product contains effective ingredients and is an excellent dietary supplement that boosts immunity and thyroid function. It has a pleasant taste, and the generous quantity lasts a long time. It has a nice aroma and is easy to use. Many users have noticed improvements in liver and thyroid function, and some have reported benefits for eczema and dryness. The packaging is airtight, and the overall quality is excellent.

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Truthofjuly

Posted on 30/03/2026

United States

Essential!

Verified Purchase

This was more of a quality health support purchase for thyroid and overall balance with the ingredients. It’s easy to take size, and I like that the minerals supports things behind the scenes that you don’t always “feel” immediately. I added it to round out my routine and I’m glad I did. packaging great and benefits the body even better. Helps with our composition, deficiency that occurs naturally, but we are able to purchase this supplement by taking it frequently. no side effects, taste or symptoms.

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iHerbCustomer

Posted on 22/02/2026

United States

quality supplement

Verified Purchase

NOW Foods Selenium 100 mcg (100 tablets) is a high-quality supplement with a pure formula and well-balanced dosage. Each tablet contains the active form of selenium (L-selenomethionine), which is easily absorbed. The ingredients are simple and free of unnecessary fillers, enhancing the product's credibility. The sturdy, convenient packaging, with clear ingredient and expiration information, makes it ideal for daily use. Regular use ensures immune and antioxidant support, as well as overall micronutrient balance.

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iHerbCustomer

Posted on 25/01/2026

306

Selenium

Verified Purchase

I started taking selenium on the recommendation of an endocrinologist due to a possible deficiency. As a supplement, it makes a pleasant impression, good quality, clear composition without unnecessary components. The tablets are of a convenient size, the taste is neutral, so it is easy to take. For me, it is important that this is a working option, and this is where I see its main advantage.

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