SeleniumNutrition library
Selenium
An antioxidant and thyroid-hormone cofactor — maternal and fetal thyroid function both depend on adequate selenium.
Trimester focus
| Stage | For the mother | For the baby |
|---|---|---|
| First trimester | Supports the maternal thyroid as hormone demand rises early. | Selenium-dependent thyroid hormone is essential for early brain development. |
| Second trimester | Continues supporting thyroid and antioxidant function. | Selenium-dependent thyroid hormone continues driving brain development. |
| Third trimester | Antioxidant demand rises with metabolic rate. | Builds the selenium stores a newborn needs before independent intake begins. |
Target note
High (oysters, fish, pasta, oats); watch the 400 mcg UL.