What principle defines the general framework of the carnivore diet regarding nutrient sourcing?

Obtaining all necessary nutrients from animal tissues alone.

The fundamental premise of the carnivore diet centers entirely on eliminating nearly all plant-based food sources, such as fruits, vegetables, grains, legumes, and sugars. Adherents construct their entire nutritional intake solely from animal products. This means that all required macronutrients, vitamins, minerals, and energy must be derived exclusively from consuming meat, fish, eggs, and occasionally certain dairy products, effectively treating animal tissues as the complete and sufficient source of sustenance.