21 CFR § 172.315
Nicotinamide-ascorbic acid complex
June 25, 2020
Nicotinamide-ascorbic acid complex may be safely used in accordance with the following prescribed conditions:
(a) The additive is the product of the controlled reaction between ascorbic acid and nicotinamide, melting in the range 141 °C to 145 °C.
(b) It is used as a source of ascorbic acid and nicotinamide in multivitamin preparations.