Excipient (pharmacologically inactive substance)

What is it?

FD&C Green No. 3, also known as Fast Green FCF is a food, drug and cosmetic synthetic dye with an aquamarine color. It is listed as a safe additive by the FDA. However, the European Union does not allow the use of Fast Green. This substance has been found to have tumorigenic effects in experimental animals, as well as mutagenic effects in both experimental animals and humans.^[1] It's use in coloring foods, pharmaceuticals and cosmetics may be of quantities allowable by the U.S. FDA.