Obesity can be a hormonal dysregulation of fat accumulation. Hormones can shut down energy expenditure (thyroid hormone). Hormones can increase energy expenditure (adrenalin). Hormones can tell us we are full (peptide YY, cholecystokinin). Hormones can tell us we are hungry (ghrelin). These are automatically regulated, and so is our weight. We don’t consciously control our body weight any more than we control our heart rates or our body temperatures. Body fatness is a critical determinant of species survival.Īs such, we rely on hormones to precisely and tightly regulate body fat. If they were too skinny, they would not be able to survive the lean times. If early humans were too fat, they could not easily run and catch prey and would be more easily caught themselves. A critical physiological variable such as body fatness is not left up to only the vagaries of daily caloric intake and exercise. Hormones are central to obesity as is everything about human metabolism, including body weight. Higher than usual insulin levels tell our body to store more food energy as body fat. When we don’t eat, then insulin goes down, signaling the body to burn this stored energy (body fat). When we eat, insulin goes up, signaling the body to store some food energy as body fat. There’s nothing wrong with that – that is simply its job. And the main hormone we need to know about is insulin.
So, the main problem of obesity is not necessarily the calories we eat, but how our bodies use them. Whether the calories we eat are burned as energy or stored as body fat is also tightly controlled by hormones. Whether we urinate a lot or a little is tightly controlled by hormones. Whether our heart beats faster or slower is tightly controlled by hormones. Every single physiologic process is a tight orchestration of hormonal signals. In your body, nothing happens by accident. Just following up on our post from last week – Robert – I wanted to share with you my single best weight-loss tip.
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