B ComplexVET consists of a group of eight water-soluble compounds: thiamin (vitamin B1), riboflavin (vitamin B2), niacin (vitamin B3), pantothenic acid (vitamin B5), pyridoxine (vitamin B6), cobalamin (vitamin B12), folate, and biotin. Although each B vitamin is chemically distinct, they often work together in various biochemical functions throughout the body – from cellular energy production to healthy red-blood-cell formation and healthy neurological function. Most B vitamins, with the exception of vitamin B12, are not stored in the body; consequently, they must be supplemented in an animal health product in order to maintain optimal health. Supplementing with active B vitamins is extremely important to all animals, especially animals that may not be able to convert non-active vitamins to their active forms in the liver because of compromised liver function, poorly functioning enzymes, digestive disturbances, poor diet, or age. Providing these active cofactors enhances bioavailability, ensuring the animal gets a full complement of B vitamins. Animals that have been ill or that have a poor appetite may need extra supplementation. B ComplexVET contains the entire B complex, including the activated forms of vitamin B2 (riboflavin 5;-phosphate), vitamin B6 (pyridoxal 5'-phosphate), folate (L-5-methyltetrahydrofolate), and vitamin B12 (methylcobalamin), as well as 80 mg of choline citrate. Although choline is often grouped with the B vitamin family, it is not officially a B vitamin.