... decrease immune system function.Vitamin B6plays an important role in maintain-ing optimal immunity, including antibody produc-tion and phagocytic activity. Vitamin B6deficiencyimpairs the immune ... Maestri. “Urea Cycle Disorders:Diagnosis, Pathophysiology and Therapy,” Advances inPediatrics 43 (1996): 127–170.indigestion See GASTROINTESTINAL DISORDERS.individuality See BIOCHEMICAL INDIVIDUALITY.induction ... calcium, 176 mg; vitamin A, 133 retinol equiv-alents; and similar amounts of thiamin, riboflavin, and niacin to those found in rich vanilla ice cream.One cup of vanilla-flavored ice milk with...