Bioscience Company Sues FDA Over Dietary Supplement Reversal

Bioscience company Niagen on Tuesday sued the US Food and Drug Administration over the agency’s decision to allow the sale of new dietary supplements Niagen says will compete with its products.

The FDA’s September 2025 reversal on whether a form of vitamin B3 known as nicotinamide mononucleotide could be considered a dietary supplement violates administrative law, Niagen alleged in a complaint filed in the US District Court for the District of Columbia.

The sale of products containing nicotinamide mononucleotide had been banned under the 1938 Food, Drug, and Cosmetic Act because the substance was also being investigated as a drug. ...