Vitamins are important building blocks of the body and help you have a good health. B vitamins come in many different varieties including thiamine, riboflavin, niacin/niacinamide, vitamin B6, vitamin B12, folic acid, and pantothenic acid. Hylavite is a combination of B vitamins used to treat or prevent vitamin deficiencies caused by poor diet, certain medical conditions, alcoholism or being pregnant. pregnant. This article helps provide the necessary information about Hylavite.