Vitamins are organic compounds that are necessary to sustain life. Most are found naturally in food. Animals’ bodies need vitamins for growth and maintenance.
You are probably familiar with most of the vitamins human and animal bodies need:
B vitamins (biotin, folate, niacin, pantothenic acid, riboflavin, thiamine, vitamin B-6, and vitamin B-12)
Dogs need these vitamins, too, although it is very important that we realize they may need them in different amounts than people do.