Selenium
Selenium explained
Selenium is a trace mineral involved in antioxidant enzymes and thyroid function; both deficiency and excess are harmful.
Not FDA ApprovedSelenium helps treat
• Selenium deficiency
• Thyroid hormone metabolism support
• Antioxidant enzyme support
additional medications
• Balanced diet
• Targeted dosing based on labs
• Thyroid care with clinician
medication risks
• Selenosis with excess (hair loss, brittle nails, GI symptoms)
• Potential drug interactions
side effects
• Hair loss
• Nail brittleness
• Nausea/diarrhea (with excess)
FAQs
Q: Upper limit?A: Do not exceed tolerable upper intake—excess causes selenosis.
Q: Food sources?
A: Brazil nuts, seafood, meats, grains (content varies by soil).
Q: Interactions?
A: May interact with some chemotherapies—discuss with oncologist.
Q: Autoimmunity?
A: Mixed evidence in thyroid autoimmunity—ask your clinician.
Q: FDA approval?
A: Supplements aren’t FDA‑approved to treat disease.
