When everything is working as it should, your body is constantly moving glucose through your system, using what it needs and storing the rest as glycogen to burn for fuel later. When this process gets out of whack, your blood sugar can be thrown off, leading to insulin resistance, metabolic syndrome, or type 2 diabetes.
If your doctor has already warned you about your blood sugar numbers, good news: "Research studies have found that following a low-carb diet may reduce the amount of circulating blood sugar after a meal, which may be important for people with or at risk for type 2 diabetes and metabolic syndrome." She also pointed out that weight loss of any kind may improve blood sugar levels, so if low-carb isn't your thing, find a plan that works for you.