MINERALS
Selenium (L-Selenomethionine)
Selenomethionine is a well-absorbed form of selenium that supports thyroid function and antioxidant defenses.
Also known as: selenomethionine, L-selenomethionine
At a glance
- Form
- L-Selenomethionine
- Category
- Minerals
- In an apiece formula
- 100 mcg a day (you can change it)
- Recommended intake
- 55 mcg
- Upper limit
- 400 mcg a day
- Studied for
- Immune support*
- Reference
- NIH ODS: Selenium fact sheet
What the research says
Selenomethionine, the form we use, was about twice as well absorbed as selenite in a dose-ranging trial.*
RCT (dose-ranging, form comparison) · 120 · Xia Y, Am J Clin Nutr 2005. Read the study on PubMed
Who should be careful
Our safety rules leave selenium out of a formula, or keep the amount lower, with:
Life stage
- Pregnancy
- Breastfeeding
- Trying to conceive
Always check with your doctor or pharmacist before adding a supplement if you take medication, are pregnant or nursing, or have a health condition. Stay under the upper limit from all sources combined, including multivitamins.
Symptoms it’s studied for
- Tired or low energy
- Brain fog or poor focus
- Constipation or irregularity
- Hair shedding
- Skin issues (acne, dry, eczema)
- Muscle cramps or twitches
Questions
How much selenium a day?
apiece formulas usually include 100 mcg a day. The recommended intake for adults is 55 mcg. Upper limit: 400 mcg a day.
What is selenium used for?
Selenomethionine is a well-absorbed form of selenium that supports thyroid function and antioxidant defenses. In apiece it is part of formulas for Immune support.*
Who should be careful with selenium?
apiece’s safety rules leave it out or limit it with: Pregnancy; Breastfeeding; Trying to conceive. Check with your doctor or pharmacist if any apply to you.
Can I get selenium in a personalized supplement?
Yes. apiece builds one daily blend around your goals and, if you have them, your lab results. Selenium can be part of it at the amount listed, with every ingredient shown and never more than 10 capsules a day.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This page is general information, not medical advice. Check with your doctor or pharmacist before starting a supplement, especially if you take medication, are pregnant or nursing, or have a health condition. Updated 2026-10-21.