Sodium Selenite
Sodium selenite is an authorized selenium source for food fortification and supplements. EFSA (2023) revised the Tolerable Upper Intake Level (UL) for adults to 255 µg Se/day; IOM UL is 400 µg/day.
What it is
Inorganic sodium salt of selenous acid (Na2SeO3); used as a selenium source for fortification and supplementation.
Mineral fortificant providing selenium.
Why it's flagged
- selenosis at chronic intakes above UL
What regulators actually say
"Forms of selenium that are commonly found in dietary supplements include selenomethionine, selenium-enriched yeast, sodium selenite, and sodium selenate."
"An UL of 255 μg Se/day is established for adult men and women (including pregnant and lactating women)."
Regulatory status
United States — FDA
Authorized selenium source for infant formula and food supplements
European Union — EFSA
EU-authorized selenium source; UL 255 µg/day (EFSA 2023)
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