Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorized distributors.Show more

4.8

Based on 1,396 ratings

1,224

120

What customers say

Customers express high satisfaction with Nutricost Selenium 200 mcg, highlighting its ease of use and value for money. The capsules are small and easy to swallow, making them convenient for daily intake. Many users appreciate the 240-day supply, which they find cost-effective. The supplement is praised for its clean ingredients and absence of unnecessary fillers, being gluten-free and non-GMO. It is noted for supporting overall health, particularly in antioxidant defense and thyroid function, with some users specifically mentioning benefits for conditions like Hashimoto's thyroiditis. While most reviews are positive about its quality and effectiveness, a few customers did not notice significant changes but acknowledged no adverse effects either. Overall, the product is recommended for its high-quality formulation and beneficial impact on health.

Review highlights

Top positive review

iHerb customer

Posted on Feb 2, 2025

Australia

381

214

Great Selenium from Nutricost

I'm really happy with this Nutricost Selenium supplement! It’s a great deal with more capsules at a better price than other brands, without losing quality. As someone who needs to keep my thyroid in check due to selenium-deficient soil where I live, it's super important for me. This product supports my thyroid and helps convert T4 to T3 effectively. Plus, taking selenium with zinc has been helpful for optimizing my T3 levels. Definitely a good choice!

(1,338)

Endymion

Posted on Jul 6, 2025

Belgium

Verified purchase

Since selenium is mostly scarce in the soil, supplementation is often necessary for the proper function of the immune system, as thyroid protection and antioxidant support benefits. I am taking selenium along with zinc and iodine, since they are strongly complementary, and it is highly useful to use them in this way. This high-quality mineral supplement comes in an optimal composition of 200 mcg per pill with a high number of pills per package, as well. Pills are of normal size.

CynWatt

Gold

Posted on Sep 21, 2024

525

457

5,523

Zinc & Selenium For T4 to T3 Conversion

Verified purchase

I have normal TSH, T4 but my T3 is low. Selenium is a trace element essential for conversion of T4 to T3. So I'm taking zinc plus selenium to optimize my T3 level. Both selenium and zinc are both important for thyroid function. Excess can be just as problematic as a deficiency, so I strongly recommend you seek professional advice prior to commencing supplementation with either nutrient.

Samuel

Posted on Feb 10, 2026

Austria

To strengthen the immune system

Verified purchase

Selenium is an essential mineral that the body needs in small amounts, but that small amount plays an important role. Some people feel cold in their feet when they sleep due to a selenium deficiency, and this, along with zinc, can help solve this problem.

PharmacistIrina

Gold

Posted on Dec 21, 2025

Ukraine

413

489

Small Capsule, Big Impact for My Wellness!

Verified purchase

I initially purchased these selenium capsules because I was looking to bolster my antioxidant support and promote overall thyroid health, especially after learning about its crucial role. I wanted a simple, easy-to-take form without any unnecessary fillers. My routine is incredibly straightforward: I take one small capsule daily with food, usually at breakfast, making it very easy to remember and integrate into my morning. The capsules are tiny and swallow effortlessly. While it's not the kind of supplement that gives you an immediate, dramatic "feeling," over the past few months of consistent use, I've noticed a general sense of enhanced well-being and a stronger feeling of immune resilience. I appreciate the peace of mind knowing I'm consistently supporting my body's natural defenses and a vital gland that often gets overlooked. It feels like a foundational building block for good health, working quietly in the background. If you're seeking an easy, high-quality way to incorporate this essential trace mineral into your daily routine for antioxidant and thyroid support, these capsules are an excellent, no-fuss option.

iHerb customer

Posted on Oct 8, 2025

Sweden

Selenium

Verified purchase

Title: Very satisfied! Review: I’ve been taking this selenium for a few weeks and I’m noticing positive effects. My skin looks brighter, my hair seems healthier, and I feel a bit more energetic overall. The capsules are easy to swallow with no unpleasant aftertaste. I will definitely order again! Highly recommended for supporting immunity, skin, and hair health.

iHerbCustomer

Posted on Sep 30, 2025

United States

Verified purchase

I am happy with this selenium product for overal satisfaction!

iHerb customer

Posted on Sep 24, 2025

Germany

Top selenium

Verified purchase

Nutricost Selenium 200mcg, 240 capsules, is a high-quality, vegan-friendly supplement made with premium, yeast-free, chelated selenium. Non-GMO, gluten-free, and produced in a GMP-compliant facility, it supports antioxidant activity and overall health. The large package lasts for months, making it a reliable choice for adults looking to boost their selenium intake

iHerbCustomer

Posted on May 28, 2025

Australia

High quality supplement

Verified purchase

The ingredient & minerals composition of this supplement is next level stuff. My Deficiency has improved & my frequency to consume this product is a real benefit for me , as the size of it is quite small & there is no negative after taste.

fie-koi

Silver

Posted on Mar 20, 2024

Greece

159

166

Good value for money

Verified purchase

One of the most important antioxidants Selenium is one of the most important antioxidants. I am taking this first thing in the morning along with tyrosine and Lugol's iodine diluted in a glass of water. It is helpful for the thyroid. I am having Hashimoto thyroiditis and selenium is a mineral that helps regulate the thyroid function. It also brings the anti-tpo antibodies closer to the normal range. Follow this regimen before accepting any thyroid hormones replacement therapy.

Joseph

Posted on Nov 8, 2025

Croatia

Good choice

Verified purchase

Selenium benefits include acting as an antioxidant to protect cells from damage, supporting the immune system, playing a role in thyroid and reproductive health, and potentially reducing the risk of certain chronic diseases like cancer and heart disease. It is an essential trace mineral that is crucial for making special enzymes and proteins that perform these vital functions in the body

Customer Ratings & Reviews

What customers say

Top positive review

(1,338)

Rating

Languages