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DOSERANKEVIDENCE-BASED SUPPLEMENTSFull analysis

The short answer · Selenium status

Take selenomethionine for selenium status. This is the one to buy.

NOW Foods, Selenium, 100 mcg, 100 Tablets
1

NOW Foods, Selenium, 100 mcg, 100 Tablets

4.8· 61,973 ratings· $0.05/serving

DoseRank score88

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.

View on iHerb— $0.05/sv60-sec quiz instead
Cheaper alternative$0.04 per servingNOW Foods, Selenium, 100 mcg, 250 Tablets

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.

Buy the #1 pick
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
See the full analysis — every score, every productHow the ranking works
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.

  • 6
    Swanson Vitamins, Selenium, 100 mcg, 300 CapsulesScore 87 · $0.04/serving
    iHerb

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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Questions

Frequently asked

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.

Selenomethionine is the strongest evidence signal for this outcome.

Selenomethionine at 100 mcg lands inside the studied 50-200 mcg window. DoseRank scores this product's dose fit at 74 out of 100.

NOW Foods, Selenium, 100 mcg, 100 Tablets works out at $0.05 per serving. $0.05 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.04 per serving.

No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.

Use rankings as research support

DoseRank rankings are informational and not medical advice. If you are pregnant, breastfeeding, using medications, or managing a health condition, ask a qualified clinician whether a supplement fits your situation. Stop use and report concerning adverse events to a clinician, the product maker, or the retailer.

Disclosure

Retailer links may be affiliate links. Rankings and placement are not paid placement.

NOW Foods, Selenium, 100 mcg, 100 Tablets

$0.05/serving · ★ 4.8 · In stock

60-sec quizView on iHerb