Douglas Labs

Selenium Plus

Selenium broadly praised for energy, thyroid, and hair benefits, though brand efficacy varies and dosage caution noted by some.

  • Adults seeking selenium support for healthy thyroid hormone metabolism
  • Individuals looking to maintain antioxidant defenses with selenium-based compounds
  • Practitioners protocols requiring selenium alongside complementary synergistic nutrients
  • Energy — 78% of verified reviews
Gabriel Score
94 Strong Evidence
★★★★☆ 4.6 (251) 7 sources
See breakdown →
Brand-verified ·Third-party lab tested (heavy metals, contaminants)Good manufacturing practices verifiedQuality ingredients with verified sourcingClinical evidence available for primary ingredientsClean FDA regulatory recordAuthorized distribution channel verified
Referenced by  Dr. Robert Malone, Dr. Sherri Tenpenny & Tucker Goodrich + 12 more →
$21.99
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About Douglas Labs - Selenium Plus

Selenium Plus by Douglas Labs provides selenium alongside complementary antioxidant nutrients to support healthy immune function, thyroid metabolism, and cellular protection against oxidative stress. This formulation is designed for individuals seeking foundational micronutrient support with a focus on selenium's role in antioxidant enzyme activity.

Why It's Worth Considering: Douglas Labs is a practitioner-grade brand with a longstanding reputation for quality manufacturing standards; the "Plus" formulation pairs selenium with synergistic cofactors rather than offering selenium in isolation.

Why Gabriel Recommends This

Gabriel Score: 94 Strong Evidence
Quality Verified
Douglas Labs 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
Douglas Labs 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 Gabriel 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?
Ask Gabriel
AI-powered guidance

Who Benefits

Best For

  • Adults seeking selenium support for healthy thyroid hormone metabolism
  • Individuals looking to maintain antioxidant defenses with selenium-based compounds
  • Practitioners protocols requiring selenium alongside complementary synergistic nutrients
  • Those with low dietary selenium intake from selenium-depleted soil regions

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
251 reviews
5 star
75%
4 star
15%
3 star
5%
2 star
3%
1 star
2%
All (251)
10 Clinical Research
iHerb
0 iHerb
Amazon
114 Amazon
15 Practitioners
Reddit
47 Reddit
X
13 X
TikTok
30 TikTok
Instagram
2 Instagram
Substack
0 Substack
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Apotheca's Analysis — 50+ Signals Across 6 Dimensions
Selenium broadly praised for energy, thyroid, and hair benefits, though brand efficacy varies and dosage caution noted by some.
Energy
78%
Hair Health
82%
Thyroid
74%
Antioxidant
65%
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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

Douglas Labs Product Quality Assessment
Gabriel Score Analysis
This product has been evaluated across 50+ quality signals including third-party testing, manufacturing standards, ingredient sourcing, and clinical evidence. Douglas Labs products are analyzed against our comprehensive database of practitioner-grade supplements.
Practitioner Network Endorsement Data
Apotheca Practitioner Intelligence
Douglas Labs 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
Douglas Labs is part of Gabriel's curated marketplace of practitioner-grade supplement brands. Every product from Douglas Labs 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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Douglas Labs
Douglas Labs - Selenium Plus
94
Strong Evidence
Gabriel Score
Top-tier quality across all scoring pillars. Recommended with high confidence.
Last updated: June 04, 2026
Score Breakdown
Manufacturing & GMP
92
Lab Verification
83
Review Consensus
96.2
Practitioner Confidence
52.0
Community & Social
56
Transparency
73
Consumer & Practitioner Intelligence
★★★★☆ 4.6 from 251 reviews across 7 sources
Clinical Research 30Practitioner Data 15Amazon 114Community 92+
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 Gabriel Score works