Selenium Enriched Yeast
Selenium-enriched yeast is authorized as a selenium source in EU foods and supplements per EFSA evaluation. The NIH ODS sets a tolerable upper intake level of 400 µg/day for adults.
What it is
Selenium-enriched yeast is Saccharomyces cerevisiae grown in selenium-rich media, accumulating organic selenium (mostly selenomethionine) for use as a dietary selenium source.
Selenium fortificant; dietary supplement source of organic selenium.
Why it's flagged
- excessive intake causes selenium toxicity (selenosis)
- narrow safety margin
What regulators actually say
"The Tolerable Upper Intake Level (UL) for selenium is 400 mcg/day for adults; chronic intakes above this can cause selenosis."
"An UL of 255 µg/day is proposed for adults excluding pregnant and lactating women."
Regulatory status
United States — FDA
Selenium yeast permitted as a nutrient source in dietary supplements; selenium added to foods follows 21 CFR 184.1.
European Union — EFSA
Authorized selenium source in foods for nutritional uses; EFSA confirmed safety.
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