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L-Selenomethionine

Low concern

Selenium is an essential trace mineral; L-selenomethionine is well-absorbed. RDA is 55 mcg/day for adults; UL is 400 mcg/day.

Found in

97 products

What it is

An organic form of the essential trace mineral selenium, in which selenium replaces sulfur in the amino acid methionine. Commonly used as a nutritional supplement.

Source of dietary selenium; bioavailable form used in fortified foods, infant formula, and dietary supplements.

Why it's flagged

High doses can cause selenosis (hair loss, brittle nails, GI symptoms)

What regulators actually say

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Regulatory status

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