The twin cycle hypothesis of the etiology of type 2 diabetes. During long-term intake of more calories than are expended each day, any excess carbohydrate must undergo de novo lipogenesis, which particularly promotes fat accumulation in the liver. Because insulin stimulates de novo lipogenesis, individuals with a degree of insulin resistance (determined by family or lifestyle factors) will accumulate liver fat more readily than others because of higher plasma insulin levels. In turn, the increased liver fat will cause relative resistance to insulin suppression of hepatic glucose production. Over many years, a modest increase in fasting plasma glucose level will stimulate increased basal insulin secretion rates to maintain euglycemia. The consequent hyperinsulinemia will further increase the conversion of excess calories to liver fat. A cycle of hyperinsulinemia and blunted suppression of hepatic glucose production becomes established. Fatty liver leads to increased export of VLDL triacylglycerol (85), which will increase fat delivery to all tissues, including the islets. This process is further stimulated by elevated plasma glucose levels (85). Excess fatty acid availability in the pancreatic islet would be expected to impair the acute insulin secretion in response to ingested food, and at a certain level of fatty acid exposure, postprandial hyperglycemia will supervene. The hyperglycemia will further increase insulin secretion rates, with consequent enhancement of hepatic lipogenesis, spinning the liver cycle faster and driving the pancreas cycle. Eventually, the fatty acid and glucose inhibitory effects on the islets reach a trigger level that leads to a relatively sudden onset of clinical diabetes. Figure adapted with permission from Taylor (98).
Conventional treatment for Type 1 Diabetes generally involves insulin supplementation in the form of injections. Because Type 1 is an autoimmune disorder, it can affect both children and adults, and it’s not uncommon for diabetics to be dependent on lifelong insulin treatments. Type 2, on the other hand, is largely a product of poor lifestyle choices or little access to healthy foods, and is more likely to occur later in life. However, in recent years, there has been an alarming rise in Type 2 Diabetes cases among children and adolescents, which largely stems from an overwhelming obesity issue.
Watch for thirst or a very dry mouth, frequent urination, vomiting, shortness of breath, fatigue and fruity-smelling breath. You can check your urine for excess ketones with an over-the-counter ketones test kit. If you have excess ketones in your urine, consult your doctor right away or seek emergency care. This condition is more common in people with type 1 diabetes but can sometimes occur in people with type 2 diabetes.
On a personal note, I always encourage full disclosure of a history of diabetes, even if currently diet controlled. Although a glucose level may now be within normal range, certain medical treatments/medications/illnesses may trigger a hyperglycemic (high blood glucose) level. The fully informed medical provider will closely monitor these patients and prevent uncontrolled glucose spikes from occurring.
“Basic principles of good health like eating right, exercising regularly, and maintaining a healthy weight can be as effective as medicine in the management of type 2 diabetes for most people,” says Sue McLaughlin, RD, CDE, lead medical nutrition therapist at Nebraska Medicine in Omaha. That's backed up by the Look AHEAD study, a large clinical trial funded by the National Institutes of Health and the Centers for Disease Control and Prevention (CDC). The researchers found that over a four-year period, changes like eating a healthier diet and getting more exercise led to weight loss and improved diabetes control in 5,000 overweight or obese participants with type 2 diabetes.
Before making any fiber recommendations, Dean has her patients tested for “pancreatic insufficiency.” She believes people with pancreatic insufficiency should be given digestive enzymes along with fiber, “otherwise the fiber will just bloat them up, and they’ll be quite unhappy,” she says. Dean uses a glucomannan fiber supplement for her patients with type 2 diabetes.
He emphasizes lifestyle changes and weight loss as a first step. "We give them a 3-month trial of diet and lifestyle [modification] before starting medications," he says. "A lot of times, for many patients newly diagnosed, we will see the sugars melt back into the normal range" after the weight loss and other changes. He has seen it happen after a weight loss of 7% to 10% of their starting weight.
“Decreasing caloric intake for any reason brings with it a rapid improvement in glucose control,” said Dr. Robert Lash, the chairman of the Endocrine Society’s clinical affairs committee and a professor of internal medicine at the University of Michigan. “What’s exciting here is that the improvements in glucose control persisted when the participants went back to eating a diet with a normal number of calories.”
Normally, blood glucose levels are tightly controlled by insulin, a hormone produced by the pancreas. Insulin lowers the blood glucose level. When the blood glucose elevates (for example, after eating food), insulin is released from the pancreas. This release of insulin promotes the uptake of glucose into body cells. In patients with diabetes, the absence of insufficient production of or lack of response to insulin causes hyperglycemia. Diabetes is a chronic medical condition, meaning that although it can be controlled, it lasts a lifetime.