Though the Federal Food, Drug, and Cosmetic Act (FD&C Act) gives the FDA the authority to require mandatory labeling of foods if there is a material difference between a GE product and its conventional counterpart, the agency says it is not requiring labeling of these GE fish “Because the data and information evaluated show that AquAdvantage Salmon is not materially different from other Atlantic salmon.”In this case, the GE salmon use an rDNA construct composed of the growth hormone gene from Chinook salmon under the control of a promoter from another type of fish called an “ocean pout.” According to the FDA, this tweak to the DNA allows the salmon to grow to market size faster than non-GE farm-raised salmon.