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Life Extension, Se-Methyl-Selenocysteine, 200 mcg, 100 Capsules (Discontinued Item)

By Life Extension

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The item is currently out of stock and replenishment is unconfirmed.

Out of Stock - Discontinued
  • Product Code: LEX-56710
  • UPC Code: 737870567103
  • Package Quantity: 100 Capsules
  • Dimensions: 2.1 x 2.1 x 3.8 in, 0.15 lbs (0.07 kg)

Product Overview

  • For Longer Life
  • Advanced Form of Selenium
  • Dietary Supplement

As an essential cofactor of glutathione peroxidase,86 selenium is an important antioxidant.87 Selenium is incorporated into proteins to make selenoproteins, which are important antioxidant enzymes. The antioxidant properties of selenoproteins help prevent cellular damage from free radicals. Other selenoproteins help regulate thyroid function and play a role in the immune system, DNA repair, and the detoxification of heavy metals.87-91 High doses of vitamin C (over one gram) may enhance the absorption of selenium. This mineral is best taken in conjunction with antioxidant supplements, such as vitamins C or E.92,93
Se-Methyl L-Selenocysteine (SeMC) is a naturally occurring seleno-amino acid that is synthesized by plants such as garlic and broccoli.95-98 SeMC is an organoselenium compound and also more bioabsorbable than other forms. Unlike selenomethionine, which is incorporated into proteins in place of methionine, SeMC is not incorporated into any proteins ... so it is fully available for the synthesis of selenium-containing enzymes, such as glutathione peroxidase.99

Suggested Use

Read the entire label and follow directions carefully prior to use.

Take one (1) capsule per day with a meal, or as recommended by a healthcare practitioner.

Other Ingredients

Microcrystalline cellulose, gelatin, vegetable stearate.

This product contains NO milk, egg, fish, peanuts, crustacean shellfish (lobster, crab, shrimp), soybeans, tree nuts, wheat, yeast, gluten, corn, or rice. Contains NO sugar, and no artificial sweeteners, flavors, colors, or preservatives.


Store tightly closed in a cool, dry place.

  • Keep out of reach of children.
  • Do not exceed recommended dose.
  • Do not purchase if outer seal is broken or damaged.
  • When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
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Supplement Facts
Serving Size: 1 Capsule
  Amount Per Serving % Daily Value
Selenium (as Se-Methyl L-Selenocysteine) 200 mcg 286%

iHerb Customer Reviews

5 Stars
4 Stars
3 Stars
2 Stars
1 Stars

Hard on the liver

Posted by Reviewer1251533 on Apr 30, 2011

I wanted an easily assimilable formula. My liver is temperamental following hepatis A about 30 years ago. Selenium is hard on the liver anyway, even for normal livers. I hoped that this new formula might be relatively liver-friendly but unfortunately not to my liver. If you have a strong and healthy liver you might be able to take this formula with no problems.

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6 people found the following review helpful

Selenium is great for thyroid!

Posted by Reviewer3001824 on Jun 15, 2011

Selenium helps your thyroid convert the inactive hormone (T4) to the active (T3) hormone. My husband and I have been using this product with good results.

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5 people found the following review helpful

Great Selenium

Posted by Reviewer1245432 on Aug 29, 2010

This form of Selenium isn't easy to find, but is a must-have. Supports thyroid function, and helps lower thyroid antibodies.

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4 people found the following review helpful

LE selenium

Posted by Reviewer3162710 on Dec 09, 2009

Very good product; no GI reaction. Benefits noted by third dose.

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4 people found the following review helpful

Life Extension, Se-Methylselenocysteine, 100 Capsules

Posted by noneofyourfrigginbusiness on Apr 06, 2009

Se-Methylselenocysteine is the safest, most effective form of selenium.

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10 people found the following review helpful

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