Greetings,
The following necessary nutrients are only found in animal products;
Vitamin A, Vitamin B6 (pyridoxal), Vitamin B12, Vitamin D3, EPA, DHA, Vitamin K2, Creatine, Carnitine, Carnosine, Taurine, CoQ10, Cholesterol, Heme iron, Zinc (bioavailable), Selenium (bioavailable), Iodine...