The short answer · Selenium status
Take selenomethionine for selenium status. This is the one to buy.

NOW Foods, Selenium, 100 mcg, 100 Tablets
4.8· 61,973 ratings· $0.05/serving
Selenomethionine 100 mcg — inside the studied 50-200 mcg window
Of 1,413 products scored for Selenium status, NOW Foods, Selenium, 100 mcg, 100 Tablets ranks #1 with a DoseRank score of 88. Selenomethionine is the strongest evidence signal for this outcome.
Retailer links may be affiliate links. Rankings and placement are never paid.
The form“Why Selenomethionine — not Selenium Yeast or Methylselenocysteine?”Evidence Strong evidence
Selenomethionine is the strongest evidence signal for this outcome.
- SelenomethionineThe pick
Strong evidence · 100 mcg
Selenium bound to methionine, the predominant natural dietary form; best-absorbed selenium supplement with efficient tissue retention, often used for thyroid and antioxidant enzyme support.
- Selenium Yeast
Strong evidence · 200 mcg
Selenium incorporated into yeast proteins as selenomethionine; the most bioavailable common form, with retention and tissue uptake superior to inorganic selenate or selenite.
- Methylselenocysteine
Strong evidence · 200 mcg
Organic selenium compound found in plants like garlic and broccoli; well absorbed and used to supply selenium with a wider safety margin than inorganic forms.
The dose“Is the dose actually effective?”Dose fit 74
Selenomethionine at 100 mcg lands inside the studied 50-200 mcg window.
Selenomethionine
Studied window 50-200 mcg · this pick 100 mcg
The ranking“Why should I trust this pick?”Trust 95
Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.
- 1,413 products scored
- Never paid placement
- Evidence level: Strong · 92
- 192 brands
- 8 ingredients
The price“Can I do better than $0.05 a serving?”Value 94
$0.05 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.04 per serving.
- 6Swanson Vitamins, Selenium, 100 mcg, 300 CapsulesScore 87 · $0.04/servingiHerb
Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.
Ready?
The #1 pick is $0.05 a serving.NOW Foods, Selenium, 100 mcg, 100 Tablets — in stock at a tracked retailer.
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NOW Foods, Selenium, 100 mcg, 100 Tablets ranks #1 for Selenium status with a DoseRank score of 88. The score blends clinical strength, evidence, dose fit, trust signals and value across 1,413 products scored for this outcome.