NOW Foods Selenium 200mcg
by NOW Foods
"Essential trace mineral for thyroid and antioxidant defense — 200mcg selenium from yeast-free selenomethionine"
Overview
NOW Foods Selenium provides 200mcg of selenium from L-selenomethionine — the organic, yeast-free form with the highest bioavailability. Selenium is an essential trace mineral that serves as a cofactor for glutathione peroxidase (the body's primary antioxidant enzyme system) and is critical for thyroid hormone conversion (T4 to T3). Selenium deficiency is associated with thyroid dysfunction, weakened immunity, and increased cancer risk. The 200mcg dose is the amount used in most clinical studies, including the landmark SELECT trial and NPC trial.
Key Ingredients
| Ingredient | Amount |
|---|---|
| Selenium (as L-Selenomethionine) | 200 mcg |
Pros & Cons
What We Like
- L-selenomethionine (highest bioavailability)
- 180 capsules (6-month supply)
- Under $12 (exceptional value)
- Essential for thyroid and glutathione
- 10,000+ Amazon reviews
What Could Be Better
- 200mcg is close to upper limit (400mcg)
- Can be toxic at high doses
- Don't combine with other selenium sources
- Subtle effects (antioxidant protection)
Who Is This For?
Best For
- Thyroid health support
- Glutathione system support
- Antioxidant defense
- Those with selenium-poor diets
Not Ideal For
- Those already getting selenium from diet
- Those taking other selenium supplements
- Those in selenium-rich soil regions
Our Verdict
NOW Selenium is the affordable essential trace mineral for thyroid and antioxidant defense. 180 capsules for under $12 provides 6 months of this critical nutrient. Don't exceed 200mcg daily from all sources — selenium has a narrow therapeutic window.
Alternatives to Consider
No direct alternatives listed for this product yet.