Rebound effect: See somogyi effect.
Regular insulin: A type of insulin that is rapid-acting.
Renal: Relating to the kidneys.
Retina: The center part of the back lining of the eye that senses light. It has many small blood vessels that are sometimes harmed when a person has had diabetes for a long time.
Retinopathy: A disease of the small blood vessels in the retina of the eye.
Risk factor: Anything that increases the chance of a person developing a disease or condition.