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Ergothioneine
Ergothioneine
Low concern
Naturally present in many edible foods; FDA issued no-questions GRAS Notice (GRN 734) for synthetic L-ergothioneine for specified food uses. EFSA approved as a novel food.
Found in
2 products
What it is
Naturally occurring sulfur-containing amino acid antioxidant produced primarily by fungi; abundant in mushrooms.
Endogenously consumed antioxidant via dietary mushrooms; sometimes used as a fortificant or supplement.
What regulators actually say
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Regulatory status
United States — FDA
GRAS Notice GRN 734 received 'no questions' letter for L-ergothioneine.
European Union — EFSA
Authorized as a novel food ingredient under EU Regulation 2017/2470.
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