GNC
Selenium
87/100
SUPPIE SCORE
85/100
EFFICACY
High
SAFETY
86/100
CLEANLINESS
What Does Selenium Do?
High-efficacy 200mcg selenium yeast supports antioxidant enzymes and thyroid function with strong RCT evidence. Dosage optimal, low-risk formulation, but monitor total selenium intake to avoid excess.
What are the proven benefits of 200mcg selenium yeast supplementation?
Is 200mcg daily selenium safe for long-term use?
How does selenium yeast compare to other selenium forms for absorption?
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What Are the Benefits of Selenium?
Based on proven scientific research
Antioxidant SupportStrong
Thyroid FunctionStrong
Immune HealthModerate
Cancer Risk ReductionMild
Good For:
What Are the Side Effects of GNC Selenium?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•200mcg selenium is UL (400mcg); safe for most adults but monitor total intake from food/multivitamins
•Selenium yeast form well-absorbed; low toxicity risk at this dose per NIH
•No major drug interactions; may enhance anticoagulants or chemotherapy effects
•Not recommended during pregnancy/breastfeeding exceeding 70mcg without medical advice
•Long-term high intake (>400mcg) risks selenosis (hair/nail loss, GI upset)
•Vegetarian formula; processed in facility with wheat/soy (cross-contamination possible)
Potential Side Effects
Negative Interactions
Allergens
SoyWheat
Inactive Ingredients
Microcrystalline cellulose
Low RiskDicalcium phosphate
Low RiskCroscarmellose sodium
Low RiskHydrogenated vegetable oil
Low RiskSilicon dioxide
Low RiskMagnesium stearate vegetable source
Low RiskCarnauba wax
Low RiskWhat Are the Ingredients in GNC Selenium?
Selenium (as Selenium Yeast)
200 mcg
Microcrystalline Cellulose
Dicalcium Phosphate
Croscarmellose Sodium
Hydrogenated Vegetable Oil
Silicon Dioxide
Magnesium Stearate Vegetable Source
Carnauba Wax
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Dosage & Bioavailability
How the active doses and forms in Selenium compare to the research.
•Selenium (as Selenium Yeast) is listed at 200 mcg per serving; without a source-specific reference range, dose adequacy cannot be graded.
•Selenium (as Selenium Yeast) specifies the Selenium Yeast form; any bioavailability comparison must use evidence for that exact form.
Sources & References
Frequently Asked Questions
Common questions about GNC Selenium