🛡️ Minerals · Strong evidence
Selenium
Thyroid · antioxidant · immune · cancer prevention. People take it for:
- Thyroid hormone conversion (T4 to T3)
- Antioxidant via glutathione peroxidase
- Immune function
- Sperm quality and male fertility
- Cancer risk reduction
Why it works
Selenium is a trace mineral essential for thyroid hormone metabolism and antioxidant defense via glutathione peroxidase. Narrow therapeutic window — don't exceed 400mcg daily.
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How to take Selenium
Best time to take
Morning with food
Suggested dose
100–200mcg daily; do not exceed 400mcg
Side effects and risks
- Toxic above 400mcg/day — causes selenosis (hair loss, nail brittleness, nerve damage)
- Garlic breath odor at higher doses
Selenium interactions
Works withIodine
Selenium is required by the enzymes that convert thyroid hormone, and it protects the thyroid from oxidative stress when iodine intake rises. The two work as a pair for thyroid function.
Related supplements
- 💊 Chelated Magnesium GlycinateGentle magnesium for sleep and relaxation
- 💊 Magnesium Bisglycinate ChelateGentle magnesium for sleep and relaxation
- 💊 Magnesium ComplexEssential mineral in multiple forms increases effectiveness.
- 💊 Magnesium Glycinate PowderGentle magnesium for sleep and relaxation
- 💊 Magnesium L-Threonate 2000mg ComplexMagnesium form studied for memory and sleep
- 💊 Trace Minerals ComplexSmall amounts of minerals the body needs
Medical disclaimer: Nothing on Stack Ritual constitutes medical advice. The information provided is for educational purposes only. Always consult your doctor or a qualified healthcare provider before beginning, changing, or stopping any vitamin, supplement, or wellness regimen.