Periodontists is a serious gum infection, caused by plaque and bacteria accumulating below the gum line. Left untreated, it can destroy gum and bone tissue, resulting in loss of teeth. While poor dental hygiene plays a role in the development of periodontal disease, poor nutrition also can be a factor. Because deficiencies of certain vitamins have been associated with gum disease, correcting deficiencies should be an integral component of treatment.