Zinc vs Selenium
Evidence-based comparison of Zinc and Selenium — absorption, dosage, safety, and which is best for your needs.
Zinc
Glucose metabolism / insulin sensitivity: Improves glucose uptake and insulin signaling; Thyroid support: Supports thyro
Full GuideSelenium
Thyroid support: Supports thyroid hormone production and conversion; Immune modulation: Regulates innate and adaptive im
Full GuideDetailed Comparison
| Zinc | Selenium | |
|---|---|---|
| Category | Mineral | Mineral |
| Mechanism | Glucose metabolism / insulin sensitivity: Improves glucose uptake and insulin signaling; Thyroid support: Supports thyro | Thyroid support: Supports thyroid hormone production and conversion; Immune modulation: Regulates innate and adaptive im |
| Safety | Yes, too much zinc can be harmful. Signs of too much zinc include nausea , dizziness, headaches, upset stomach, vomiting, and loss of appetite. If you | Yes, if you get too much selenium over time. Brazil nuts, for example, contain very high amounts of selenium (68–91 mcg per nut) and can cause you t |
Which Should You Choose?
Zinc may be better if: Zinc is essential for immune function and many bodily processes. Most people can get adequate zinc from diet, but supplements may be needed for some groups.
Selenium may be better if: Thyroid support: Supports thyroid hormone production and conversion; Immune modulation: Regulates innate and adaptive immune responses; Antioxidant ac