Materials approved as BSE or TSE-free do not contain any ingredients of animal origin. They are often referred to as ADI-free.
ADI stands for animal derived ingredients. In the narrower sense, the BSE/TSE approval refers to the fact that the products do not contain any animal pathogens that could transmit them.
BSE (bovine spongiform encephalopathy) is a fatal brain disease in cattle. It belongs to the group of transmissible spongiform encephalopathies (TSEs) that can spread to humans. Products with BSE/TSE approval must pass strict microbiological tests.