NOW Foods
Selenium 200 mcg
91/100
SUPPIE SCORE
88/100
EFFICACY
High
SAFETY
94/100
CLEANLINESS
What Does Selenium 200 mcg Do?
NOW Foods Selenium 200 mcg as L-Selenomethionine provides optimal dosage for thyroid support and antioxidant benefits, backed by strong clinical evidence. Formulation is clean with low-risk inactives; highly safe for daily use in adults.
How does selenium support thyroid function?
What is the recommended dosage of selenium for thyroid health?
Are there any interactions between selenium supplements and thyroid medications?
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What Are the Benefits of Selenium 200 mcg?
Based on proven scientific research
Thyroid SupportVery strong
Antioxidant ProtectionStrong
Immune FunctionModerate
Good For:
What Are the Side Effects of NOW Foods Selenium 200 mcg?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•Selenium at 200 mcg is within the safe upper limit of 400 mcg/day for adults, supporting thyroid benefits without toxicity risk in healthy individuals.
•L-Selenomethionine form enhances bioavailability for thyroid enzyme activity, with low risk of side effects at this dosage.
•No major drug interactions, but may enhance effects of thyroid medications; consult physician if on levothyroxine.
•Safe for most adults; avoid in pregnancy/breastfeeding without medical advice due to potential fetal selenium accumulation.
•GMP-certified manufacturing minimizes contamination risks; free from common allergens like soy, dairy, gluten, nuts.
•Long-term use safe at this dose, but monitor for signs of excess like garlic breath or nail changes.
Potential Side Effects
Negative Interactions
Allergens
None (soy-free, dairy-free, gluten-free, nut-free)
Inactive Ingredients
Rice flour
Low RiskHypromellose (cellulose capsule)
Low RiskStearic acid (vegetable source)
Low RiskWhat Are the Ingredients in NOW Foods Selenium 200 mcg?
Selenium (elemental)
200 mcg
L-Selenomethionine
from 40 mg
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Dosage & Bioavailability
How the active doses and forms in Selenium 200 mcg compare to the research.
•Selenium (elemental) — 200 mcg per serving; within the 200 mcg/day used in studies.
•L-Selenomethionine — 40,000 mcg per serving is over the 400 mcg/day upper limit (IOM (NIH ODS)) and the 255 mcg/day limit (EFSA 2023). This amount is unusually high; check the units on the label.
•L-Selenomethionine — l selenomethionine is among the preferred forms of selenium in Suppie's ingredient library.
Sources & References
Frequently Asked Questions
Common questions about NOW Foods Selenium 200 mcg