Selenium
Trace MineralAlso known as: Selenomethionine · Sodium selenite · Se
🟡Moderate Evidence 12 expert mentions 20 studies referenced
An essential trace mineral and component of selenoproteins including glutathione peroxidase and thyroid deiodinases. Important for thyroid function and antioxidant defense. Narrow therapeutic window — excess is toxic.
Common forms:selenomethionineselenium yeastsodium selenite
Evidence comparisons not yet run for these claims.
Expert Mentions
All 12 mentionsRhonda Patrick
FoundMyFitness· PhD, Biomedical Science
"Testing blood selenium or selenium via red blood cell testing before supplementing is worthwhile given the narrow therapeutic window."
Extracted claim
Testing blood selenium or selenium via red blood cell testing before supplementing is worthwhile given selenium's narrow therapeutic window.
Not yet assessedHigh extraction confidence
Rhonda Patrick
FoundMyFitness· PhD, Biomedical Science
"For supplementation, 50 to 200 micrograms per day appears safe."
Extracted claim
For supplementation, 50 to 200 micrograms per day appears safe.
50–200 micrograms⏱ per day📍 General supplementation range described as appearing safe
Not yet assessedHigh extraction confidence