Research overview: taurine dependence and the consequences of deficiency

Cats require dietary taurine, and this overview reviews this classic example of feline nutritional specialisation. Unlike many mammals, cats cannot make enough taurine themselves and must get it from animal tissue, and deficiency causes serious disease, including degeneration of the retina leading to blindness and a form of heart failure. The discovery of these links reshaped commercial cat food formulation. Researchers established the requirement through controlled feeding studies and clinical investigation. Why it matters: taurine dependence is a textbook case of how obligate carnivory translates into a hard dietary requirement, with direct, severe health consequences if unmet. It illustrates why cats cannot simply eat what omnivores eat, and it stands as a landmark in companion-animal nutrition that prevented widespread disease once the link was understood and diets were corrected.