Selenium (Citrate), 180 Capsules
Pure Encapsulations Selenium (Citrate) delivers selenium in citrate form, a mineral-organic acid complex designed to support absorption, for adults seeking to maintain adequate selenium status.
May be a fit for
- Adults seeking selenium citrate to support healthy thyroid hormone metabolism
- Individuals maintaining antioxidant defenses via selenium-dependent glutathione pathways
- Practitioners protocols requiring a well-tolerated, citrate-bound selenium form
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Pure Encapsulations Selenium (Citrate) delivers selenium in citrate form, a mineral-organic acid complex designed to support absorption, for adults seeking to maintain adequate selenium status. Selenium is a trace mineral that supports antioxidant enzyme function, thyroid hormone metabolism, and normal immune activity.
Why It's Worth Considering: Pure Encapsulations formulates this in citrate form within a hypoallergenic capsule, free from common excipients and fillers, a hallmark of this practitioner-grade brand's approach to clean, precise dosing.
Pure Encapsulations · 180 CapsulesMake it part of your routine.
Take 1 capsule daily with a meal, or as directed by a health professional.
Important cautions & interactions
Product details
Supplement facts & complete label
Supplement Facts — Serving size: 1 capsule.
Selenium (as selenium citrate): 200 mcg (364% DV).
Other ingredients: hypoallergenic plant fiber (cellulose), vegetarian capsule (cellulose, water).
Label directions
Take 1 capsule daily with a meal, or as directed by a health professional.
Label cautions
If you are pregnant or lactating, have any health condition, or are taking any medication, consult your health professional before use. Keep out of reach of children. Use only if the safety seal is intact. Store in a cool, dry place.
Source: Pure Encapsulations manufacturer label · September 06, 2026. Formulas and labels can change. Check the packaging you receive.
Who it may suit
May be a fit for
- Adults seeking selenium citrate to support healthy thyroid hormone metabolism
- Individuals maintaining antioxidant defenses via selenium-dependent glutathione pathways
- Practitioners protocols requiring a well-tolerated, citrate-bound selenium form
- Those with low dietary selenium intake seeking foundational trace mineral support
Considerations
- 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)
Compatibility & interactions
Works Well With
Ask Gabriel for personalized stacking recommendations.
Take Separately From
No significant interactions identified. Always consult your healthcare provider.
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Thorne - NAC, 90 CapsulesSelenium is required for glutathione peroxidase enzyme function. NAC provides the substrate (cysteine). Together they maximize the glutathione antioxidant system.$33.99Real reviews. A wider perspective.
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A few useful answers.
Research & further reading
More category questions
How much selenium should I take?
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).
Is selenium good for thyroid?
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.
Can I just eat Brazil nuts instead?
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.
Supplement information is provided for education and is not a substitute for personalized medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label before use.