Metabolism and Nutrition
One of the reasons the human senses appreciate carbohydrates is that the consumption of slow sugarsâ is vital in an environment that produces little food, where there is the need of exhausting activity to supply the organism The valuing of carbohydrates causes very little damage in the cultures in which people eat little of them or eat them moderately. In industrialized cultures where food is in abundance, this tendency to assimilate carbohydrates becomes noxious for every organism that (a) expends little physical energy and (b) has a metabolism that consumes few substances activated by the carbohydrates. The fact that the food industry discourages the production of fruits and vegetables that have taste and assaults the people with advertising that encourages the consumption of products full of unhealthy sugars, fat, and carbohydrates accentuates the health problems associated with the overconsumption of carbohydrates. This is an example of the negative impact of a social aspect of an instinctive propensity on the organism.
Physicians often recommend reducing carb consumption because they stimulate the production of insulin. This increase can favor the advent of diabetes. The increase of insulin facilitates the storage of what is eaten, and consequently the formation of lipids that promote the advent of obesity.
On the other hand, lowering the intake of carbohydrates and lowering cholesterol32 can together provoke a reduction in the amount of serotonin33 produced by the organism and induce suicidal tendencies. Because there is often a link between depression and serotonin, in this mechanism we have yet another possible cause of the way that a diet can increase a depressive mood.
In the case of anorexia and obesity, the metabolic activity accommodates to the eating habits of the organism34 If a person decides to change diet, the metabolism will not change its demands unless the change lasts at least for months. Therapy therefore demands a long-term strategy to resolve the physiological, mental, and behavioral vicious circle that rules the organism.35