Selenium
Type
mineral
Dosage Summary
The RDA for selenium is 55 mcg for adults. Selenium supplements are available in several forms, with selenomethionine being one of the most bioavailable organic forms.
Innate Stores
Forms
capsule, tablet, yeast-based
Selenium is an essential trace mineral that plays a critical role in antioxidant defense systems, thyroid function, and immune system support. It is incorporated into proteins to make selenoproteins, which are important antioxidant enzymes.
The antioxidant properties of selenoproteins help prevent cellular damage from free radicals.
Key Functions
- Acts as a powerful antioxidant
- Supports thyroid hormone metabolism
- Enhances immune system function
- Helps protect against oxidative stress
- May support reproductive health
The RDA for selenium is 55 mcg for adults. Selenium supplements are available in several forms, with selenomethionine being one of the most bioavailable organic forms.
| Form | Bioavailability | Best For |
|---|---|---|
| Selenomethionine | High | General supplementation, long-term use |
| Sodium Selenite | Medium | Inorganic form, less expensive |
| Selenium-enriched Yeast | High | Natural form, contains multiple selenium compounds |
Note: Optimal dosage may vary based on individual factors like age, weight, health conditions, and goals. It's always best to start with a lower dose and gradually increase as needed.