. . . "Specific examples of isotope-labeled water include 2H2O, 3H2O, and H2 18O. ???Food additive??? includes, but is not limited to, organoleptic agents (i.e., those agents conferring flavor, texture, aroma, and color), preservatives such as nitrosamines, nitrosamides, N-nitroso substances and the like, congealants, emulsifiers, dispersants, fumigants, humectants, oxidizing and reducing agents, propell" . . . .