Carbs and fats provide energy for the body. When carbs are limited in the diet, fat becomes the preferred and efficient fuel source. When you reduce your intake of one macronutrient, you have to increase your intake of at least one other macronutrient—otherwise you’ll feel hungry and not have enough energy. The low-fat craze started with flawed science that incorrectly stated that fat was dangerous. In a low carb, high-fat diet, fat provides you with the energy your body needs, and also helps knock out hunger and cravings.
Yet Gabbay says preliminary human studies with positive results, like this week’s in BMJ Case Reports, suggest the diet is worthy of further study in a larger population over a longer period of time. For now, he cautions people with diabetes, especially those on insulin and sulfonylureas to lower their blood sugar, against trying intermittent fasting before speaking with their healthcare provider.
“Patients should empower themselves by checking their blood sugars daily, knowing what their target blood sugar levels should be, and having regular appointments with their doctor,” Arguello added. “If patients are having blood sugars above their target blood sugar levels then this may be a warning sign that they need to talk with their physician on how to take a different approach in managing their diabetes.”
Note that these medications used to treat type 2 diabetes are typically not used in pregnant or breastfeeding women. At present the only recommended way of controlling diabetes in women who are pregnant or breastfeeding is by diet, exercise, and insulin therapy. You should speak with your health-care professional if you are taking these medications, are considering becoming pregnant, or if you have become pregnant while taking these medications.