The Superstar Thyroid Mineral

9 Answered Questions
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Easy, Vegan and Nut-free Way to Boost Selenium

200 micrograms of L-Selenomethionine; an optimal daily dose you can count on

Selenium is an essential mineral that is a star player on the Antioxidant A-Team along with Vitamins A, C and E. It helps to support and balance our immune system by neutralizing free radicals, promoting overall health and wellness.

Our bodies need selenium in a big way, as it is part of a well balanced diet.1 Produce today may be grown in soils that are depleted in minerals such as selenium.2 (Plants can only absorb selenium; they don’t actually produce it!) We get selenium in our diet by eating plants with selenium or eating animals that ate lots of plants containing selenium. Mineral-depleted soil means selenium-deficient food.

The other challenge is that there aren’t a lot of foods that accumulate much selenium, even if they are grown in selenium-rich soil.3 Brazil nuts offer the highest concentrations (eating two per day can give you a daily dose),4 but we’ve found that it’s surprisingly hard to get your hands on quality nuts. What you typically find in the grocery store might be rancid or have mold, so it is important to check what you buy and take note of the flavour.5

Fish such as tuna and halibut are the other big source of selenium, but friends don’t let friends get their daily dose of selenium from fish. If you eat seafood, you are probably aware that it’s wise to limit consumption to minimize exposure to heavy metals such as mercury.6

This is pure selenium with no additional nutrients. It is formulated for maximum bioavailability and easy digestion. Because what’s the point of taking a supplement if your body isn’t able to absorb and use it?

A Daily Dose of an Essential Antioxidant Mineral

Thyroid Regulation

The largest concentrations of selenium are found in the thyroid. Selenium powers enzymes that convert the thyroid hormone T4 to T3. T3 plays a role in growth, temperature regulation, and metabolism. 7

Strengthen Immune Response

Selenium plays an important function in the regulation of the immune system. The antioxidant properties of selenium can help balance the immune system by neutralizing free radicals and supporting white blood cell function.8

Heart Health

The antioxidant properties of selenium can help to maintain a healthy heart and cardiovascular system.9

Antioxidant Protection

Our own immune system uses free radicals to fight the bad guys, but free radicals are messy little troublemakers. The gunk they leave behind leads to inflammation and oxidative stress. Antioxidants gobble up the gunk before it can do harm.10

Ongoing Research

Selenium may also reduce the risk of certain cancers. Some scientific evidence suggests that consumption of selenium may reduce the risk of certain forms of cancer. However, FDA has determined that this evidence is limited and not conclusive.

The Active Ingredients Inside Selenium

Supplement Facts
Serving Size: 1 Vegan Capsule Servings Per Container: 90
Amount per Serving % DV
(as selenomethionine)
200mcg 364%

† Daily Value (DV) not established

Other Ingredients: Rice Flour, Vegetable Cellulose (capsule)

This product contains no wheat, gluten, GMO, soy, dairy, egg, corn, fish, shellfish, peanuts, tree nuts, barley or added sugar. Proudly vegan, third-party tested, and manufactured in a NSF certified cGMP facility in the USA using worldwide ingredients.

Store in a cool, dry place. Avoid excessive heat. Do not use if safety seal is broken.

Optimal Daily Dose

Unless you live on a Brazil nut farm, it’s hard to get the optimal daily dose of selenium from your diet. Just one capsule a day gives you an easy 200 micrograms.

Nut-free and Vegan

We want our vegan friends and those with nut allergies or sensitivities to get enough of this important nutrient. You need it, friends!

3rd Party Tested and True

Selenium is third-party tested and certified before it ships to ensure you’re getting exactly what the label says.


We are relentless about sourcing the best, most natural, most ethically produced ingredients available. The ingredients in Nested Naturals selenium are 100% non-GMO.

Your Questions, Our Answers

See the most popular questions asked about Selenium.

How is Nested Naturals Selenium different from other forms of Selenium?

Nested Naturals has formulated our dietary selenium for easy digestion and absorption. Not all forms of supplemental selenium are equal. We chose the most bioavailable L-Selenomethionine rather than the selenate and selenite forms.

The Form: L-Selenomethionine
Selenium is an essential mineral that the human body needs, but can be difficult to digest depending upon what it bonds to. When selenium is absorbed from the soil by plants, it bonds to amino acids in the plant. The amino acids help our body absorb the selenium efficiently when we eat our Brazil nuts and other plants that are rich in this mineral.

It’s not feasible to extract from plants sufficient quantities of selenium to create a dietary supplement. As a result, many selenium supplements on the market are produced synthetically in a lab. Some are made from yeast, but lots of people have problems with yeast and we want our supplement to work for everyone.

How many capsules should I take per day?

Take one capsule daily, preferably with a meal.

Should I take this on an empty stomach or with a meal?

We recommend taking it with a meal.

Is Nested Naturals Selenium a synthetic form of selenium?

Supplementary selenium is typically synthetic. It’s not feasible to extract the mineral from plants or other organic material in sufficient quantities to make a dietary supplement.

Is Nested Naturals Selenium non-GMO?

Nested Naturals Selenium is proudly non-GMO, gluten-free, soy-free and made in a NSF certified GMP facility.

Why are there “Other ingredients” listed on the Nested Naturals Selenium label?

We believe that you deserve to know everything that goes into your body. That’s why we include every single ingredient on our label … not just the active ingredients. We are transparent about the “other” ingredients that are necessary to create a working supplement that other labels often don’t bother to mention, such as thickening agents, capsule materials and natural flavoring. These amounts of these ingredients are so tiny that most supplement makers don’t bother listing them.

What is rice flour doing in Nested Naturals Selenium?

Rice flour helps flow the supplement ingredients into the capsule. Tiny amounts are used during the manufacturing process. You’ll find it listed under “Other Ingredients” on our label because we believe that you deserve to know everything that goes into our supplements and your body.

What is vegetable cellulose and what is it doing in Nested Naturals Selenium?

We use vegetable cellulose to make our gel-caps. We’re proud to say that our capsules are vegan and don’t include any animal parts.

Customer Reviews

Discover what real customers say about Selenium.

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LAURA B Verified Buyer 22/05/18
The Selenium is one of the products that I take every day. I am very healthy and eat well daily. I appreciate your products.
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The science behind all of our claims

  • 6. Karimi R, Fitzgerald TP, Fisher NS. A quantitative synthesis of mercury in commercial seafood and implications for exposure in the united states. Environ Health Perspect. 2012;120(11):1512-1519.
  • 7. Drutel A, Archambeaud F, Caron P. Selenium and the thyroid gland: More good news for clinicians. Clin Endocrinol (Oxf). 2013;78(2):155-164.
  • 8. Arthur JR, McKenzie RC, Beckett GJ. Selenium in the immune system. J Nutr. 2003;133(5 Suppl 1):1457S.
  • 9. Tinggi U. Selenium: Its role as antioxidant in human health. Environmental Health and Preventive Medicine. 2008;13(2):102-108.
  • 10. Rayman MP. Selenium and human health. Lancet (London, England). 2012;379(9822):1256-1268.