"Vitamins are organic compounds that take part in a wide range of metabolic activities. Dogs require vitamins in their food at low concentrations. First noticed in dogs some 75 years ago, vitamin deficiencies can lead to widely ranging clinical abnormalities that reflect the diversity of their metabolic roles."

Below is a list of the many vitamins contained in our products and the functions that are benefited by each vitamin:

Vitamin	Functions
Vitamin A	Vision; growth; immune function; fetal development; cellular differentiation; transmembrane protein transfer
Vitamin D	Maintenance of mineral status; skelatal structure; muscle contraction; blood clotting; nerve conduction; cell signaling phosphorus balance
Vitamin E	Defense against oxidative damage via free radical scavengin
Thiamine (B1)	Energy and carbohydrate metabolism; activation of ion channels in neural tissue
Niacin	Enzyme functions
Riboflavin (B2)	Enzyme functions
Choline	Involved in Absorption and transport of fat
Pantothenic Acid	Energy Metabolism
Pyrodoxine (B6)	Glucose generation; red blood cell function; niacin synthesis; nervous system
Folic Acid	Amino acid and nucleotide metabolism; mitochondrial protein synthesis
Vitamin (B12)	Enzyme functions
Other Contents
Calcium	Necessary for the formation and maintenance of strong bones and teeth; blood coagulation; nerve impulse transmission; muscle contraction; cell signaling

Reference: http://www.lowchensaustralia.com/health/vitamins.htm