Cat vitamins often work in conjunction with minerals and enzymes to assure normal digestion, reproduction, muscle and bone growth and function, healthy skin and hair, clotting of blood, and the use of fats, proteins, and carbohydrates by the body.

Vitamins are generally classified into two groups based on how or if they are stored in the body. Fat-soluble vitamins are stored in the liver and fatty tissue. Water-soluble vitamins, on the other hand, are stored in only very small amounts by the body. They need to be taken in daily, and any excesses are excreted by the body each day.

ESSENTIAL VITAMINS

  Water-Soluble Vitamins

   VITAMIN B1 (THIAMIN)

   VITAMIN C

   VITAMIN B5

(PANTOTHENIC ACID) 

   VITAMIN B6 (PYRIDOXINE)

   VITAMIN B12 (CYANOCOBALAMIN)

  VITAMIN B2 (RIBOFLAVIN)

   VITAMIN B3 (NIACIN)

The water-soluble vitamins are easily assimilated or eliminated through urine without harming the cat (however, too many particular vitamins may have become an issue with certain medical conditions or treatments). The B vitamins are water-soluble and your cat needs niacin, riboflavin or thiamine (Vitamin B1). 

The B vitamins help to maintain a strong immune system. A deficiency in B vitamins may lead to vulnerability to illnesses, slow wound healing, general weakness or slow reflex function.

Vitamin C helps in the synthesis of collagen, which is an essential tissue in a cat's body. Other recommended water-soluble vitamins are folic acid, biotin or choline.

  Fat-Soluble Vitamins

   VITAMIN E

   VITAMIN K

   VITAMIN A

   VITAMIN D

Vitamins A, D, E and K are fat-soluble vitamins. These vitamins are deposited in the fat tissues of the cat. If taken in excess, the fat-soluble vitamins may poison your pet. Always talk to your vet before giving your pet fat-soluble vitamins. However, Vitamin A is always recommended as a supplement, because the cat's body cannot process the beta-carotene into Vitamin A. A lack of Vitamin A can cause skin and coat problems or night blindness.