Specific nutrients for Animal and Plants

Vitamin C isn’t the only nutrient that’s essential for one species but not for others. Many organic compounds (substances similar to vitamins) and elements (minerals) are essential for your green or furry friends but not for you, either because you can synthesize them from the food you eat or because they’re so widely available in the human diet and you require such small amounts that you can get what you need without hardly trying. Two good examples are the organic compounds choline and myoinositol. Choline is an essential nutrient for several species of animals, including dogs, cats, rats, and guinea pigs. Although choline has now been declared essential for human beings, human bodies produce choline on their own, and you can get choline from eggs, liver, soybeans, cauliflower, and lettuce. Myoinositol is an essential nutrient for gerbils and rats, but human beings synthesize it naturally and use it in many body processes, such as transmitting signals between cells.
Here’s a handy list of nutrients that are essential for animals and/or plants but not for you:
Organic Compounds
Carnitine
Myoinositol
Taurine

Elements
Arsenic
Cadmium
Lead
Nickel
Silicon
Tin
Vanadium