Thorne Selenium Review: The Best Selenomethionine for Hashimoto's?
By StopTheFlare Research Team · Last updated May 30, 2026
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Quick Verdict
Pros
- Uses the well-absorbed selenomethionine form
- Clean formulation with no unnecessary fillers
- Dosed at the research-backed 200 mcg
Cons
- Slightly pricier than generic selenium
- Capsule size is on the larger side
Bottom line: A clean, correctly dosed selenomethionine that matches what the antibody research actually used.
Who this is best for
People with Hashimoto's who want a no-nonsense selenium at the dose studied for lowering thyroid antibodies.
Ingredients Analysis
Selenium (as L-selenomethionine)
200 mcg — the form and dose with the strongest antibody evidence.
Other ingredients
Hypoallergenic capsule, no common allergens or artificial fillers.
What the research says
Randomized trials have found that 200 mcg/day of selenomethionine can reduce TPO antibodies over 3 to 6 months, with the largest effect in selenium-deficient individuals.
Benefits plateau at 200 mcg; higher doses add risk without added benefit, which is why this product's dosing is appropriate rather than excessive.
What the community says
“My antibodies finally started trending down after switching to a real selenomethionine product.”
“No stomach upset, which I cannot say for the cheaper brand I tried first.”
Compared to alternatives
Our verdict
If you want the exact form and dose the research supports, Thorne Selenium is an easy recommendation. It is not magic — selenium is one piece of a broader protocol — but it is a clean, honest product that does what it claims.
Product FAQs
Most studies measured changes over 3 to 6 months. Consistency matters more than dose.