PETA researchers sought the assurances after discovering studies financed by the companies that
used animals like rats and chimpanzees to test taste perception and, in some cases, to bolster support for promotional health claims. In one study involving a Coca-Cola scientist, financed by
Nutrasweet, chimpanzees' faces were cut open to study nerve impulses used in the perception of sweet tastes.
Scientists conducting basic research in animal models have cautioned against PETA's hard line, saying their work--which may have medical benefits--would not be possible in many cases without help from corporate sponsors.