In my ongoing reading of The Obesity Code, Dr. Fung talks about looking at calorie reduction for weight loss.
He is suggesting that when we reduce calorie intake, the body reduces calorie burning. So reducing calories is not necessarily going to bring about weigh loss.
Calories In - Calories Out = Body Fat
This is a misleading and possibly incorrect notion. We have used this theory for years while obesity has exploded.
Dr. Fung argues that the body regulates everything. All systems in the body are regulated. Hormones regulate every system in the body. The thyroid, parathyroid, sympathetic, respiratory, circulatory, hepatic, renal, gastrointestinal, adrenal systems are all under hormonal control. So is body fat. The body actually has multiple systems to control body fat.
In UK the number of calories ingested slightly decreased in the last 3 decades, even as obesity rates increased. Even rates of caloric fat ingested had decreased while obesity rates increased.
If a women is given a calorie reduction of 500 calories per day, in short time her calorie burning will also reduce by 500 calories per day.
This is because the body also regulates a basal metabolic rate, which, when we eat lower calories also goes down. Calories in and Calories out are NOT INDEPENDENT of each other, they are tightly related to one another. Your fat stores are regulated by hormones and if hormones regulate fat growth, then obesity is a hormonal, not a caloric disorder.
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