Klaire Labs/SFI Health

Seleno Met (Selenium) 200mcg

Selenium widely praised for thyroid, energy, and hair benefits, with minor caution around antioxidant use without confirmed oxidative stress.

  • Adults seeking selenomethionine support for healthy thyroid hormone metabolism
  • Practitioners protocols requiring organic selenium in highly bioavailable amino acid form
  • Individuals supporting antioxidant defenses with 200mcg selenomethionine daily
  • Thyroid — 82% of verified reviews
Gabriel Score
84 Strong Evidence
★★★★☆ 4.7 (4.4K) 7 sources
See breakdown →
Brand-verified ·Good manufacturing practices verifiedQuality ingredients with verified sourcingClean FDA regulatory recordPositive consumer reviews and community feedbackAuthorized distribution channel verified
Referenced by  Dr. Robert Malone, Dr. Sherri Tenpenny & Tucker Goodrich + 12 more →
$21.99
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About Klaire Labs/SFI Health - Seleno Met (Selenium) 200mcg

Seleno Met by Klaire Labs/SFI Health delivers 200 mcg of selenium as L-selenomethionine, an organically bound form that mirrors how selenium occurs naturally in food and supports superior retention compared to inorganic selenium salts. This trace mineral plays a key role in antioxidant enzyme function, thyroid hormone metabolism, and immune system support. It's well-suited for individuals seeking a clean, bioavailable selenium option.

Why It's Worth Considering: Klaire Labs formulates to practitioner standards with minimal excipients, and L-selenomethionine is among the most researched forms for tissue incorporation and steady-state plasma levels.

Why Gabriel Recommends This

Gabriel Score: 84 Strong Evidence
Quality Verified
Klaire Labs/SFI Health 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
Klaire Labs/SFI Health 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 selenomethionine support for healthy thyroid hormone metabolism
  • Practitioners protocols requiring organic selenium in highly bioavailable amino acid form
  • Individuals supporting antioxidant defenses with 200mcg selenomethionine daily
  • Those with dietary gaps in selenium from low-selenite soil region diets

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.

4.7
4376 reviews
5 star
75%
4 star
15%
3 star
5%
2 star
3%
1 star
2%
All (4376)
10 Clinical Research
iHerb
0 iHerb
Amazon
4239 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 widely praised for thyroid, energy, and hair benefits, with minor caution around antioxidant use without confirmed oxidative stress.
Thyroid
82%
Energy
87%
Hair Health
75%
Antioxidant
68%
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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

Klaire Labs/SFI Health 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. Klaire Labs/SFI Health products are analyzed against our comprehensive database of practitioner-grade supplements.
Practitioner Network Endorsement Data
Apotheca Practitioner Intelligence
Klaire Labs/SFI Health 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
Klaire Labs/SFI Health is part of Gabriel's curated marketplace of practitioner-grade supplement brands. Every product from Klaire Labs/SFI Health 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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Klaire Labs/SFI Health
Klaire Labs/SFI Health - Seleno Met (Selenium) 200mcg
84
Strong Evidence
Gabriel Score
Strong quality signals. Meets recommended thresholds across most pillars.
Last updated: June 04, 2026
Score Breakdown
Manufacturing & GMP
55
Lab Verification
78
Review Consensus
100
Practitioner Confidence
50.0
Community & Social
57
Transparency
70
Consumer & Practitioner Intelligence
★★★★☆ 4.7 from 4376 reviews across 7 sources
Clinical Research 30Practitioner Data 15Amazon 4239Community 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