This type of diabetes, formerly classified as juvenile-onset, occurs suddenly between the ages of 1 and 40, requiring insulin injections and a carefully controlled diet.

Type I Diabetes Mellitus or as specified "Juvenile Diabetes" Is a somewhat uncommon form of diabetes which results as the inability to produce insulin, which is needed to process glucose. Many believe this type of diabetes is caused by adverse immune reaction that results in the body attacking the Beta cells of the pancreas which insulin is produced from. The condition is chronic, and requires insulin to mantain.