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It is recommended that all expecting mothers consume 1.4 milligrams of riboflavin daily

While animal studies suggest safety, long-term human studies are lacking

While no mechanism suggests delayed toxicity, this cannot be completely ruled out without long-term controlled studies

Ethics statement Ethical approval was not required for the studies on humans in accordance with the local legislation and institutional requirements because only commercially available established cell lines were used

A key biological player This water-soluble vitamin is involved in red blood cell formation, cell metabolism, nerve function and DNA production

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