This content is provided as a service of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), part of the National Institutes of Health. The NIDDK translates and disseminates research findings through its clearinghouses and education programs to increase knowledge and understanding about health and disease among patients, health professionals, and the public. Content produced by the NIDDK is carefully reviewed by NIDDK scientists and other experts.
The ketogenic, or keto, diet calls for dramatically increasing your fat intake and consuming a moderate amount of protein and a very low amount of carbs, with the aim of kicking your body into a natural metabolic state called ketosis, in which it relies on burning fat rather than carbs for energy. Ketosis is different from diabetic ketoacidosis, a health emergency that occurs when insulin levels are low in conjunction with high levels of ketones. (37) Ketones are by-products of metabolism that are released in the blood when carb intake is low.
In normal persons the hormone insulin, which is made by the beta cells of the pancreas, regulates how much glucose is in the blood. When there is excess glucose in the blood, insulin stimulates cells to absorb enough glucose from the blood for the energy that they need. Insulin also stimulates the liver to absorb and store any glucose that is excess in blood. Insulin release is triggered after a meal when there is rise in blood glucose. When blood glucose levels fall, during exercise for example, insulin levels fall too.
The term "diabetes" or "to pass through" was first used in 230 BCE by the Greek Apollonius of Memphis. The disease was considered rare during the time of the Roman empire, with Galen commenting he had only seen two cases during his career. This is possibly due to the diet and lifestyle of the ancients, or because the clinical symptoms were observed during the advanced stage of the disease. Galen named the disease "diarrhea of the urine" (diarrhea urinosa).
“The field has suffered from a checkered history 20, 30 years ago, when there were operations that were dangerous. But modern metabolic surgery is very safe,” Cummings said. “The risk of dying from a laparoscopic gastric bypass is a little bit less than the risk of dying from having your gallbladder or appendix removed. But we never consider those risky surgeries; they’re totally bread-and-butter procedures.”
Cataracts and glaucoma are also more common among diabetics. It is also important to note that since the lens of the eye lets water through, if blood sugar concentrations vary a lot, the lens of the eye will shrink and swell with fluid accordingly. As a result, blurry vision is very common in poorly controlled diabetes. Patients are usually discouraged from getting a new eyeglass prescription until their blood sugar is controlled. This allows for a more accurate assessment of what kind of glasses prescription is required.