Best Selenium Supplements of 2026

Elisa Drew Avatar
Elisa Drew
Last Updated: Jan 23, 2026

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Selenium supplements are a popular dietary supplement that is believed to support overall health and well-being. Selenium is a trace mineral that is essential for the proper functioning of many bodily processes, including immune function, thyroid function, and antioxidant activity. Selenium supplements are available in a variety of forms, including capsules, tablets, and liquids, and can be found at most health food stores and online retailers. While selenium is an important nutrient, it is important to speak to a healthcare provider before taking any new supplements to ensure that they are safe and appropriate for individual needs.

At a Glance: Our Top Picks

Thorne Selenium - Antioxidant Support Supplement Cover #TOP 1
Thorne Selenium - Antioxidant Support Supplement
ftb score rating icon 9.8
Bronson Selenium 200 mcg - Essential Trace Mineral for Immune System and Metabolism Support, 250 Vegetarian Capsules Cover #TOP 2
Bronson Selenium 200 mcg - Essential Trace Mineral for Immune System and Metabolism Support, 250 Vegetarian Capsules
ftb score rating icon 9.7
Nature's Bounty Selenium 200 mcg Tablets Cover #TOP 3
Nature's Bounty Selenium 200 mcg Tablets
ftb score rating icon 9.5

Top 10 Selenium Supplements

#TOP 1

Thorne Selenium - Antioxidant Support Supplement

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Thorne Selenium - Antioxidant Support Supplement Cover
THORNE - Selenium - 200 mcg Selenium Supplement for Antioxidant Support* - 60 Capsules

This Selenium supplement supports normal thyroid function in healthy individuals and reduces oxidative damage caused by toxins, smoking, alcohol use and stress. It also promotes healthy skin, hair, and cognitive function. It is an essential nutrient to help maintain optimal health and wellness, and is free from gluten, eggs, tree nuts, peanuts, dairy, soy, fish, or shellfish. Thorne is a trusted brand, chosen by champions and trusted by 100+ pro teams, and the only supplement manufacturer to collaborate with Mayo Clinic on wellness research and content. It is also a proud partner of 11 U.S. Olympic Teams.

What We Like
High quality ingredients
Easy to swallow capsules
No fillers or additives
Supports thyroid and immune health
No aftertaste or side effects
What We Don't Like
Occasional Amazon payment issues
#TOP 2

Bronson Selenium 200 mcg - Essential Trace Mineral for Immune System and Metabolism Support, 250 Vegetarian Capsules

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Bronson Selenium 200 mcg - Essential Trace Mineral for Immune System and Metabolism Support, 250 Vegetarian Capsules Cover
Bronson Selenium 200 mcg – Yeast Free Chelated Amino Acid Complex - Essential Trace Mineral with Superior Absorption, 250 Vegetarian Capsules

The Bronson Selenium 200 mcg is a yeast-free chelated amino acid complex that provides essential micronutrient selenium for immune system, thyroid and metabolism support. Albion Minerals chelated technology ensures superior absorption, stability, quality and easy digestion. It is laboratory tested Non-GMO, Gluten Free, Soy Free supplement in 250 vegetarian capsules. Bronson Vitamins have been a trusted brand since 1960, recommended by top medical professionals.

What We Like
Yeast-free chelated formula
Superior absorption
Gentle on stomach
Supports immune and thyroid health
Non-GMO and lab-tested purity
What We Don't Like
One capsule not full
#TOP 3

Nature's Bounty Selenium 200 mcg Tablets

Nature's Bounty Selenium 200 mcg Tablets Cover
Nature's Bounty Selenium, Supports Prostate and Immune System Health, 200 mcg, 100 Tablets

Nature's Bounty Selenium Tablets provide support for the prostate and immune system with a clinically studied dosage of 200 mcg of Selenium. These vegetarian-friendly tablets offer the convenience of just one tablet a day. Selenium is known for its benefits in maintaining a healthy prostate and boosting the immune system. With Nature's Bounty Selenium Tablets, you can easily incorporate this essential mineral into your daily routine to support your overall health and well-being.

What We Like
Good quality and taste
Easy to swallow
Supports heart and thyroid health
Natural brewer's yeast source
Affordable price
What We Don't Like
Limited evidence for cognitive support
#TOP 4

Nutricost Selenium 200mcg, 240 Vegetarian Capsules

NTC179101
Nutricost Selenium 200mcg, 240 Vegetarian Capsules Cover
Nutricost Selenium 200mcg, 240 Vegetarian Capsules, Non-GMO, Gluten Free L-Selenomethionine

Nutricost Selenium 200mcg supplement comes in a bottle containing 240 vegetarian capsules, with 200mcg of selenium per capsule. It provides 240 servings, with just one capsule per serving. The product is non-GMO, gluten-free, soy-free, and contains vegetarian capsules that are 3rd party tested. The product is manufactured in a GMP compliant, FDA registered facility.

What We Like
Easy to swallow capsules
Effective symptom relief
Good price point
High quality supplement
Quick delivery
What We Don't Like
Uncertain effectiveness
#TOP 5

Pure Encapsulations Selenium Supplement

Pure Encapsulations Selenium Supplement Cover
Pure Encapsulations Selenium - 200 mcg - for Healthy Cellular Function, Immune System & Antioxidant Defenses - Mineral Supplement - Vegan & Gluten Free - 60 Capsules

Get immune system support, healthy blood flow, and antioxidant support with Pure Encapsulations Selenium Supplement. It helps protect normal cell function, promotes healthy blood flow, and scavenge free radicals. The supplement is made with premium ingredients and is free from wheat, eggs, tree nuts & peanuts, gluten, artificial colors, flavors & sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers & preservatives.

What We Like
Helpful for Hashimoto's
Clean, pure ingredients
Easy to swallow
Immunity boost
Trusted supplement brand
What We Don't Like
Slight odor
High dose caution
#TOP 6

Life Extension Super Selenium Complex

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Life Extension Super Selenium Complex Cover
Life Extension Super Selenium Complex, 200 mcg – 3 Forms of Selenium, Vitamin E – Cellular Health & Longevity Support – Gluten-Free, Non-GMO, Vegetarian, 1 Daily – 100 Capsules

Life Extension Super Selenium Complex is a dietary supplement that contains three forms of selenium and vitamin E. This supplement is designed to promote cellular health and longevity support by helping your body fight against oxidative stress that contributes to the aging process. Selenium may also support healthy thyroid, immune function, brain, and heart health. Made with only the finest raw ingredients with the purity and potency your body deserves, this supplement is non-GMO, gluten-free, and manufactured in the USA.

What We Like
Immune system support
Antioxidant protection
Multiple selenium forms
Includes vitamin E
Easy to swallow capsules
What We Don't Like
Unpleasant smell
Occasional mild aftertaste
#TOP 7

NOW Supplements Selenium (L-Selenomethionine) 100mcg, 100 Tablets

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NOW Supplements Selenium (L-Selenomethionine) 100mcg, 100 Tablets Cover
NOW Supplements, Selenium (L-Selenomethionine) 100 mcg, Essential Mineral*, 100 Tablets

If you're looking for a high-quality selenium supplement, NOW Supplements Selenium is an excellent choice. Selenium is an essential trace mineral that can be found naturally in various foods. This supplement provides 100 mcg of selenium per tablet, making it easy to get your daily dose. It is yeast-free and suitable for vegans, soy-free, non-GMO, and kosher. Take 1 to 2 tablets daily with food. NOW Supplements is a family-owned and operated company that has been producing quality products since 1968. The product is GMP Quality Assured and packaged in the USA.

What We Like
Trusted American brand
Third-party tested quality
Easy to swallow tablets
Good value for money
Supports thyroid health
What We Don't Like
Results may take time
#TOP 8

NOW Foods Selenium 200 mcg VCaps

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NOW Foods Selenium 200 mcg VCaps Cover
NOW Foods Selenium 200 mcg VCaps, 180 ct

This Selenium supplement is manufactured in the United States and comes in a package dimension of 2.5"L x 2.5"W x 3.2"H. Even during the summer months, Amazon stores and ships the product according to the manufacturer's recommendations. It is a great source of Selenium for people who need this essential mineral.

What We Like
Clean ingredients
Small, easy-to-swallow capsule
Reliable, stable selenomethionine form
No aftertaste
Good value
What We Don't Like
Contains some fillers
Initial minor itchiness
#TOP 9

NOW Foods NAC 600 mg with Selenium 400 Capsules

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NOW Foods NAC 600 mg with Selenium 400 Capsules Cover
Now NAC 600 mg, 400 Capsules, N-Acetyl Cysteine with Selenium

The NOW NAC 600 mg Selenium supplement offers a powerful dose of N-acetyl cysteine, a stable form of the amino acid cysteine that supports your body's protein structure and helps produce the important antioxidant glutathione. With 25 mcg of added Selenium, this product also assists in creating essential enzymes that keep your body functioning well. Plus, when you choose this 400-capsule bottle, you contribute to a greener planet since the company plants one tree for every 20 bottles sold. This eco-friendly approach makes it easy for you to support both your health and the environment.

What We Like
Easy to swallow capsules
No aftertaste
Capsules not broken or damaged
Supports immune health
Good value price
What We Don't Like
Uncertain noticeable effects
#TOP 10

Micro Ingredients Selenium 200mcg Softgels with Coconut Oil

BA-MI-SEL500
Micro Ingredients Selenium 200mcg Softgels with Coconut Oil Cover
Micro Ingredients Selenium Supplements for Women & Men 200mcg, 500 Softgels with Coconut Oil | Essential Trace Mineral as Selenomethionine | Antioxidant for Energy, Heart, & Immune Support

The Micro Ingredients Selenium Softgels provide a highly absorbable form of selenium called L-Selenomethionine, which your body easily recognizes and uses to maintain overall health. Each softgel is combined with coconut oil to help your body absorb the nutrient more efficiently, so you get the most benefit from each dose. With 500 softgels in a pouch, you have a convenient one-a-day supply that supports your energy, immune system, heart, and cellular health. This supplement helps activate glutathione, a powerful antioxidant in your body, helping you stay energized and healthy every day.

What We Like
Pleasant smell and taste
Easy to swallow capsules
Clean, transparent ingredients
Good bioavailability
High product quality
What We Don't Like
Limited feedback on long-term effects
Buying Guide Image

The Best Selenium Supplements to Buy Right Now

Introduction

Selenium is a trace mineral that is essential for the proper functioning of the human body. It is known to play a crucial role in metabolism, reproduction, and the immune system. While most people get enough selenium through their diet, some individuals may benefit from taking selenium supplements. In this article, we will discuss how to choose the right selenium supplement for your needs.

The Different Forms of Selenium Supplements

Selenium supplements are available in several forms, including selenium yeast, selenomethionine, and sodium selenite. Selenium yeast is derived from the metabolism of Saccharomyces cerevisiae, a type of yeast. It is considered a more bioavailable form of selenium, which means that it is more easily absorbed by the body. Selenomethionine is a synthetic form of selenium that is similar to the selenium found in foods such as Brazil nuts and fish. Sodium selenite is a salt form of selenium that is often used in multivitamin supplements.

Choosing the Right Dosage

The recommended daily allowance (RDA) of selenium for adults is 55 micrograms per day. However, some individuals may require a higher dose of selenium depending on their age, sex, and other factors. It is important to consult with a healthcare provider before starting a selenium supplement to determine the appropriate dosage for your needs. Overdosing on selenium can cause serious side effects, such as garlic breath, hair loss, and digestive upset.

Selecting a Reputable Brand

When choosing a selenium supplement, it is important to select a reputable brand. Look for brands that have been tested and certified by third-party organizations such as the United States Pharmacopeia (USP) or NSF International. These organizations ensure that the supplements meet certain quality standards and do not contain harmful ingredients. It is also a good idea to read customer reviews and compare prices to find the best value for your money.

Conclusion

Selenium is an essential trace mineral that plays a crucial role in various bodily functions. While most people get enough selenium through their diet, some individuals may benefit from taking selenium supplements. When choosing a selenium supplement, it is important to consider the form, dosage, and brand. Always consult with a healthcare provider before starting a selenium supplement to ensure that it is safe and effective for your needs.

Frequently Asked Questions (FAQs)

1. Who should take selenium?

Selenium is beneficial for individuals with conditions like rheumatoid arthritis (RA) and certain types of cancer, as they often have low levels of selenium. It also plays a role in thyroid function and supports a healthy immune system.

2. What are the signs you need selenium?

Signs that indicate a potential selenium deficiency include fatigue, mental fog, weakened immune system, hair loss, muscle weakness, and infertility.

3. Are there any negative side effects to taking selenium?

Excessive intake of selenium can lead to toxicity symptoms such as nausea, vomiting, nail discoloration and brittleness, hair loss, fatigue, irritability, and foul breath odor.

4. What does selenium do for thyroid?

Selenium contributes to the antioxidant defense in the thyroid by removing oxygen free radicals generated during the production of thyroid hormones. It plays a crucial role in maintaining thyroid health.

5. What is selenium supplement good for?

Selenium supplements offer several benefits, including acting as a powerful antioxidant, reducing the risk of certain cancers, protecting against heart disease, helping prevent mental decline, supporting thyroid health, boosting the immune system, and potentially reducing asthma symptoms.

6. Why would a person take selenium?

Selenium is a vital nutrient for overall health. It supports reproduction, thyroid gland function, DNA production, and protects the body from free radicals and infection.

7. What are 6 signs of selenium deficiency?

Six signs of selenium deficiency include infertility in men and women, muscle weakness, fatigue, mental fog, hair loss, and a weakened immune system.

8. What happens when you start taking selenium?

When you start taking selenium supplements, it is believed to offer various benefits such as boosting immune function, improving hair and nail health, and supporting a healthy thyroid. Sometimes, selenium supplements are combined with other antioxidant vitamins like vitamin E or C.

9. Is it OK to take selenium everyday?

The recommended daily intake of selenium for adults and pregnant/lactating women is 400 micrograms. It is generally safe to take selenium daily up to this recommended amount, as it is unlikely to cause harmful effects on health.

10. Is selenium OK for hypothyroidism?

Supplementing with selenium has been shown to reduce thyroid peroxidase antibodies (TPO) and the severity of symptoms related to hypothyroidism in several studies. It can be beneficial for individuals with hypothyroidism.

Editor's Notes

During our selenium supplement research, we found 24 selenium supplement products and shortlisted 10 quality products. We collected and analyzed 207,829 customer reviews through our big data system to write the selenium supplements list. We found that most customers choose selenium supplements with an average price of $20.03.

The selenium supplements are available for purchase. We have researched hundreds of brands and picked the top brands of selenium supplements, including THORNE, Bronson, Nature's Bounty, Nutricost, Pure Encapsulations. The seller of top 1 product has received honest feedback from 48,289 consumers with an average rating of 4.9.

Written by
Elisa Drew Avatar

Elisa Drew is a really professional copywriter specializing in baby products with five years of experience working as a pediatrician once. She has published a series of baby books purchased by over thirty thousand people in the United States.

Selenium Supplements Comparison Table

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Brand THORNE Bronson Nature's Bounty Nutricost Pure Encapsulations Life Extension NOW Foods NOW Foods NOW Foods Micro Ingredients
Item Form capsules Capsule Tablet Capsule Capsule Capsule Tablet Capsule Capsule Softgel
Unit Count 60 Count 250 Count 100 Count 240 Count 60.00 Count 100 Count 100 Count 180 Count 400.00 Count 500 Count
Primary Supplement Type Selenium Selenium Selenium Selenium Selenium Selenium (as Se-Methyl L-Selenocysteine, L-selenomethionine (yeast free), sodium selenite), Vitamin E (as D-alpha tocopheryl succinate) Selenium Selenium - Selenium
Flavor Unflavored Unflavored Unflavored Unflavored Unflavored Unflavored Unflavored Unflavored - Unflavored
FTB Score
ftb score rating icon 9.8
ftb score rating icon 9.7
ftb score rating icon 9.5
ftb score rating icon 9.4
ftb score rating icon 9.4
ftb score rating icon 9.4
ftb score rating icon 9.4
ftb score rating icon 9.2
ftb score rating icon 9.0
ftb score rating icon 8.9
Where to Buy