2. Biguanides Metformin is the only form of biguanide currently available. While it may promote modest weight loss and a slight decline in LDL, or "bad," cholesterol, side effects may include nausea, diarrhea, and (when other risk factors are present) the harmful buildup of lactic acid. Glucophage, Glumteza, and Riomet are some brand-name types of metformin available for use.
What is prediabetes? Prediabetes is a condition where blood sugar levels are higher than normal, but not high enough to be diagnosed as type 2 diabetes. This occurs when the body has problems in processing glucose properly, and sugar starts to build up in the bloodstream instead of fueling cells in muscles and tissues. Insulin is the hormone that tells cells to take up glucose, and in prediabetes, people typically initially develop insulin resistance (where the body’s cells can’t respond to insulin as well), and over time (if no actions are taken to reverse the situation) the ability to produce sufficient insulin is reduced. People with prediabetes also commonly have high blood pressure as well as abnormal blood lipids (e.g. cholesterol). These often occur prior to the rise of blood glucose levels.
One of my patients, aged 58, had an initial hemoglobin A1c of 7.2%. She was taking oral hypoglycemic agents, statins, and proton pump inhibitors—the basic treatment for every diabetes diagnosis. The patient was 28 lbs overweight and worked long hours. She didn’t exercise, mostly ate a processed food diet, and was sleep deprived. The patient had a family history of diabetes, and ultimately her lifestyle expressed her genetic tendencies.

On day four, my glucose levels had dropped to 4.6 after fasting for 10 hours overnight. It was the first time I'd ever scored a 4. But on day six, I felt really cold. It was mid-July but in the morning my fingertips were white and I had to wear a T-shirt, shirt, jumper and jacket to work. I was hungry, and just walking around the office was tiring. But I was down to 9st 3lb.

You should have no more than three of these “feeding times” per day. The reason limiting the number and duration of your meal times is so important has to do with staying out of the vicious cycle of increasing insulin resistance. To get smart on insulin resistance — the cause of both type 2 diabetes and obesity — read Dr. Jason Fung’s book, The Obesity Code: Unlocking the Secrets of Weight Loss, or watch his free lecture on YouTube.