Se-Methyl L-Selenocysteine
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
Certifications & Testing
Other Ingredients
Microcrystalline Cellulose, Vegetable Cellulose, Stearic Acid, Silica
Recommended Use
Read the entire label and follow the directions carefully prior to use. Directions: Take one (1) capsule daily, with food, or as recommended by a healthcare practitioner.
Warnings
Warnings: 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. To report a serious adverse event or obtain product information, contact 1-866-280-2852.
Frequently Asked Questions
What is Life Extension Se-Methyl L-Selenocysteine's Formulate score?
Life Extension Se-Methyl L-Selenocysteine scores 94 out of 100 (grade A) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is Life Extension Se-Methyl L-Selenocysteine worth it?
Life Extension Se-Methyl L-Selenocysteine scores 94/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Life Extension Se-Methyl L-Selenocysteine?
Each serving contains Selenium (200 mcg). Serving size: 1 Vegetarian Capsule(s). 90 servings per container.
How do I take se-methyl l-selenocysteine?
Read the entire label and follow the directions carefully prior to use. Directions: Take one (1) capsule daily, with food, or as recommended by a healthcare practitioner.
Who makes Se-Methyl L-Selenocysteine?
Se-Methyl L-Selenocysteine is made by Life Extension. See Formulate's full grade and product lineup for Life Extension on its brand page.
Is Life Extension Se-Methyl L-Selenocysteine third-party tested?
Life Extension lists the following certifications and testing for this product: Non-GMO, Non GMO LE Certified.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.