Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.
Robert Ferry Jr., MD, is a U.S. board-certified Pediatric Endocrinologist. After taking his baccalaureate degree from Yale College, receiving his doctoral degree and residency training in pediatrics at University of Texas Health Science Center at San Antonio (UTHSCSA), he completed fellowship training in pediatric endocrinology at The Children's Hospital of Philadelphia.
Individuals are more likely to have insulin resistance if they have any of several associated medical conditions. They also are more likely to be insulin resistant if obese, Latino, African-American, Native American, or Asian-American.
While there are genetic risk factors, insulin resistance can be managed with diet, exercise, and proper medication.
Insulin is a hormone that is produced by the beta cells of the pancreas. These cells are scattered throughout the pancreas in small clusters known as the islets of Langerhans. The insulin produced is released into the blood stream and travels throughout the body. Insulin is an essential hormone that has many actions within the body. Most actions of insulin are directed at metabolism (control) of carbohydrates (sugars and starches), lipids (fats), and proteins. Insulin also regulates the functions of the body's cells, including their growth. Insulin is critical for the body's use of glucose as energy.
Insulin resistance (IR) is a condition in which the body's cells become resistant to the effects of insulin. That is, the normal response to a given amount of insulin is reduced. As a result, higher levels of insulin are needed in order for insulin to have its proper effects. So, the pancreas compensates by trying to produce more insulin. This resistance occurs in response to the body's own insulin (endogenous) or when insulin is administered by injection (exogenous).
With insulin resistance, the pancreas produces more and more insulin until the pancreas can no longer produce sufficient insulin for the body's demands, then blood sugar rises. Insulin resistance is a risk factor for development of diabetes
and heart disease.
Aside from the well known association of insulin resistance with the
metabolic syndrome, abdominal obesity, elevated cholesterol levels, and high
blood pressure; there are several other medical conditions that are associated
with insulin resistance specifically. While the associations are clear, whether
insulin resistance is the cause of these conditions is not yet known.