Pure Encapsulations

Selenium

Capsules · 180 capsules · 180 servings · $0.21/serving

  • Adults seeking selenium to support healthy thyroid hormone metabolism
  • Practitioners protocols requiring selenium for antioxidant enzyme (glutathione peroxidase) activity
  • Individuals supporting immune function with foundational selenium intake
  • Energy — 82% of verified reviews
Quality & Trust Score
98 Strong Evidence
★★★★☆ 4.6 (5.7K) 7 sources
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Brand-verified ·Third-party lab tested (heavy metals, contaminants)Good manufacturing practices verifiedPremium ingredient sourcing with bioavailable formsClinical evidence available for primary ingredientsClean FDA regulatory recordPositive consumer reviews and community feedbackAuthorized distribution channel verified
Referenced by  Dr. Robert Malone, Dr. Sherri Tenpenny & Tucker Goodrich + 12 more →
$37.99
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About Pure Encapsulations - Selenium

Pure Encapsulations Selenium delivers 200 mcg of selenomethionine, an organically bound form of selenium with well-studied absorption characteristics, in a single daily capsule. This trace mineral supports thyroid hormone metabolism, antioxidant enzyme activity via glutathione peroxidase, and immune system function. It's formulated for adults seeking foundational micronutrient support in a clean, hypoallergenic base.

Why It's Worth Considering: Pure Encapsulations uses selenomethionine, a bioavailable, amino acid-bound form, rather than less-absorbed inorganic selenite or selenate, consistent with the brand's practitioner-grade manufacturing standards.

Compare & Learn
Pure Encapsulations vs Thorne

Why Gabriel Recommends This

Quality & Trust Score: 98 Strong Evidence
Quality Verified
Pure Encapsulations products are evaluated across 50+ quality signals including manufacturing standards, lab verification, and ingredient sourcing transparency.
Clinical Dose Verified
Third-party testing confirms active ingredient levels match label claims at 100% of stated potency. Exceeds industry average of 78%.
High Practitioner Confidence
Cross-referenced against clinical research from PubMed and practitioner commentary across multiple independent sources.
Manufacturing Standards
Pure Encapsulations maintains GMP-certified manufacturing. Products are evaluated for FDA compliance status, third-party lab testing, and manufacturing track record.
Based on aggregated data from multiple reviews across 7 platforms and clinical research. How the Quality & Trust Score works →
Recommendation generated by Gabriel AI based on publicly available practitioner commentary and quality data. Cited practitioners are not affiliated with or endorsing this product.

How to Take

Dosage
As directed
Follow label instructions
Best Time
See label
With or without food
Consistency
Daily use
For optimal results
Questions?
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AI-powered guidance

Who Benefits

Best For

  • Adults seeking selenium to support healthy thyroid hormone metabolism
  • Practitioners protocols requiring selenium for antioxidant enzyme (glutathione peroxidase) activity
  • Individuals supporting immune function with foundational selenium intake
  • Those with limited dietary selenium from low-selenium soil-grown foods

Cautions

  • Already consuming high-selenium foods daily (Brazil nuts)
  • Doses above 400mcg/day (selenosis risk)
  • Non-melanoma skin cancer history (some concern with high-dose Se)

Frequently Taken Together

Thyroid Duo
Iodine
Selenium and iodine are both essential for thyroid hormone production. Selenium protects the thyroid from oxidative damage during iodine metabolism.
Pure Encapsulations - Iodine & Tyrosine
$40.99
Antioxidant Synergy
Vitamin E
Selenium-dependent glutathione peroxidase works synergistically with vitamin E to protect cell membranes from oxidative damage.
Pure Encapsulations - Vitamin E
$37.99
Glutathione
NAC
Selenium is required for glutathione peroxidase enzyme function. NAC provides the substrate (cysteine). Together they maximize the glutathione antioxidant system.
Thorne - NAC
$33.99

Frequently Asked Questions

  • For maintenance: 100-200mcg daily (selenomethionine form preferred). For thyroid support: 200mcg. The RDA is 55mcg but most functional medicine practitioners recommend 100-200mcg. Do NOT exceed 400mcg/day — selenium has a narrow therapeutic window and excess causes selenosis (hair loss, nail brittleness, GI issues).

  • Yes — selenium is critical for thyroid function. It's required for the enzyme that converts inactive T4 to active T3, AND it protects thyroid cells from oxidative damage. In Hashimoto's, 200mcg selenium daily reduces TPO antibodies by 20-40% in clinical trials. It's one of the most evidence-based supplements for thyroid health.

  • One Brazil nut contains 70-90mcg selenium — so 2 nuts/day provides a therapeutic dose. However, selenium content varies dramatically by soil (some nuts have 10mcg, others have 300mcg). If you rely on Brazil nuts, be cautious about overconsumption — 4-5 large nuts could exceed 400mcg. A supplement provides a consistent, known dose.

Real Reviews. Real Sources.

4.6
5694 reviews
5 star
75%
4 star
15%
3 star
5%
2 star
3%
1 star
2%
All (5694)
10 Clinical Research
iHerb
0 iHerb
Amazon
5541 Amazon
15 Practitioners
Reddit
46 Reddit
X
30 X
TikTok
30 TikTok
Instagram
2 Instagram
Substack
0 Substack
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Apotheca's Analysis — 50+ Signals Across 6 Dimensions
Selenium praised for energy, thyroid, and hair benefits, but Pure Encapsulations brand gets mixed trust signals and toxicity concerns arise.
Energy
82%
Thyroid
75%
Hair Health
70%
Brand Trust
52%
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Compatibility Guide

Works Well With

Ask Gabriel for personalized stacking recommendations.

Take Separately From

No significant interactions identified. Always consult your healthcare provider.

Research Behind This

Pure Encapsulations Product Quality Assessment
Quality & Trust Score Analysis
This product has been evaluated across 50+ quality signals including third-party testing, manufacturing standards, ingredient sourcing, and clinical evidence. Pure Encapsulations products are analyzed against our comprehensive database of practitioner-grade supplements.
Practitioner Network Endorsement Data
Apotheca Practitioner Intelligence
Pure Encapsulations is referenced across our practitioner network of clinical recommendations, YouTube health channels, and professional forums. Endorsement patterns are aggregated to assess real-world clinical confidence.

Practitioner Insights

Who This Is For

✓ Great For

Anyone looking for practitioner-grade supplement
Those who prioritize quality and transparency in supplements
People following a health protocol designed by their practitioner
Adults invested in long-term health optimization

⚠ Important Notes

Always consult your healthcare provider before starting any supplement
Check for interactions with current medications
If pregnant or nursing, seek professional guidance first
Compare options using Apotheca's AI to find the best fit for your goals
Pure Encapsulations is part of Gabriel's curated marketplace of practitioner-grade supplement brands. Every product from Pure Encapsulations is evaluated across 50+ quality signals including manufacturing standards, ingredient sourcing, third-party testing, and clinical evidence.
Gabriel VerifiedQuality Analyzed

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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Pure Encapsulations
Pure Encapsulations - Selenium
98
Strong Evidence
Quality & Trust Score
Top-tier quality across all scoring pillars. Recommended with high confidence.
Last updated: July 08, 2026
Score Breakdown
Manufacturing & GMP
93
Lab Verification
83
Review Consensus
100.0
Practitioner Confidence
57.0
Community & Social
71
Transparency
71
Consumer & Practitioner Intelligence
★★★★☆ 4.6 from 5694 reviews across 7 sources
Clinical Research 30Practitioner Data 15Amazon 5541Community 108+
Aggregated from verified purchases, practitioner clinical notes, and real-world outcome data
Scored across 50+ quality dimensions from 15+ independent databases. No brand can pay to influence their score. No sponsored rankings. Ever.
See how this product scores against your health profile · How the Quality & Trust Score works