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How can a high-​carb diet lower your blood sugar?

Thin Diabetes, Fat DiabetesIf you are healthy, your blood sugar will stay within a narrow range, regardless of how much carbohydrate you eat. But in people with diabetes mellitus, the amount of a sugar called glucose rises to dangerously high levels in the bloodstream. There are two main types of diabetes mellitus. Type 1 diabetes (thin diabetes) results when the pancreas loses its ability to make a hormone called insulin. People with thin diabetes need to take insulin by injection. Type 2 diabetes (fat diabetes) results when the body becomes resistant to the effects of insulin.

Much of the glucose in the bloodstream comes from the sugars and starches in the food. For this reason, many people think that people with diabetes need to eat low-​carbohydrate diets. Yet scientists have known since the 1930s that the more carbohydrate you eat, the more sensitive your body becomes to the effects of insulin. The more fat you eat, the less sensitive your body becomes to insulin. When people with thin diabetes switch to a low-​fat, high-​carbohydrate diet, they typically have to reduce their insulin dosage. When people with fat diabetes switch to a low-​fat, high-​carbohydrate diet, they lose weight and become undiabetic.

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