![]() Without that, diets and exercise are a waste of time and effort. In order to lose weight, the fasting insulin should be below 10. ![]() Normal ranges are established from an average of what most people have in their blood. The current “normal range” for fasting insulin is silly, being 2.5 to 26, a whopping difference. Fasting blood sugar roughly correlates however, the fasting insulin reflects more time in the body than a spot blood sugar. Fasting insulin is now regarded as an important lab test that should be part of any routine check-up. The key to reducing fat is to get your insulin level low. Excess insulin with its high blood sugar is a stress response that causes poor health, even dementia. That is the evolutionary human diet what we eat today with processed foods is not what our body wants. Back when we ate the foods of nature – root vegetables, whole fruit, nuts, wild meat, eggs and fish – the dominant nutrient was fat followed by protein and then carbohydrates, only about 15% of calories. Our bodies did not evolve to eat carbohydrates like we do today, averaging 60% of our daily food intake in calories. When we expose ourselves to a daily ample amount of carbohydrates, our daily high insulin level results in insulin resistance, overweight or obesity, type 2 diabetes and even high blood pressure and high cholesterol. The actual biochemistry is more complicated, but the general principle as stated is true. Any excess carbohydrates we do not burn for energy become fat through lipogenesis. When we stress our body with excess carbohydrates, insulin pours out and “locks the door” for burning fat. Fung points out, insulin is a fat storage hormone. Curiously, type 2 diabetics, currently over 90 % of those with diabetes, have excessive insulin and what is called insulin resistance, that is, the insulin does not work well in lowering blood sugar. Type 1 diabetics lose their capacity for making insulin in the pancreas and will die unless they get insulin. In medical school we are taught that insulin is the hormone that allows sugar to enter cells for energy. In his book, The Obesity Code (Greystone, 2016), Fung, a nephrologist turned obesity physician, describes with great clarity and solid science that obesity is a hormonal illness: the central hormone is insulin. I never realized I could skip meals and have greater mental clarity and more energy. Jason Fung, MD, taught me how not to eat.
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