An Evolutionary Gamble

To understand how to lose fat, it helps to have an understanding of why people gain fat. As odds as this may sound, it’s because people have big brains It is pure random accident that different evolutionary branches select different adaptations to be their main tool of survival. For humans, the main tool of survival was (and is) the mind. We are the animal species that took the evolutionary gamble on a big brain เว็บตรง , and it was a formidable gamble. What we traded off in exchange for this big brain was a greater risk of death at childbirth, owing to the fact that we give birth to infant before they are fully developed, to be able to pass a larger cranial cavity through the birth canal.

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Also part of the gamble in opting for the bigger brain was that this larger brain required a constant, uninterrupted supply of energy – in the form of either glucose or ketone bodies. When this animal with the higher caloric requirement first came on the scene, and for many millennium afterward, it existed in an environment of food scarcity. To survive, it had to device a metabolic system that could supply energy continuously to its brains, and this meant that becoming omnivorous was to its decided advantage. Developing an ability to convert protein into glucose, and to store energy (in the form of body fat) that could be tapped and metabolized into ketone bodies during times of calories scarcity, bettered its chances for survival.

People get fat in modern times because, having evolved a metabolism that allows for storage of energy during times of food scarcity, the body never developed a compensatory negative feedback loop to reduce energy storage during period of food abundance. That’s because such periods never existed – until now. So, in the current environment of food abundance – particularly refined carbohydrates, which keep glycogen stores completely full (with the result that glucose stacks up in the bloodstream, raising our insulin levels) – it’s a snap to store body fat. In absence of a negative feedback loop, that storage never stops. Even morbidly obese people stay ravenously hungry, and they tend to be even hungrier than lean people, because they have higher insulin levels, with minimum insulin sensitivity on their muscle cells and unaffected insulin sensitivity on their fat cells. With their setup, nutrients can be portioned directly to fat storage during period of food abundance.

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