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Response to: "May open up…future paths towards a general reduction in our fat intake"

Posted by lardasss on 07 Feb 2014 at 20:26 GMT

I personally take issue with this recommendation. The findings that your team has found, that humans can detect the fat content of foods, indicates to me that fat (especially fats higher in saturated fats) is a critically important nutrient for human physiology, and not something to be consciously avoided or reduced. Is it any wonder that mother's milk is greater than 50% fat (half of which is saturated fatty acids), or that fat is the most satiating macronutrient (along with protein)? I propose (with evolutionary concepts in mind) that the ability to detect fat content in food is an ancient mechanism developed to support humans' ever-increasing requirement for dietary fats due to a variety of important physiological functions (brain expansion/function would be one example) and changes in the human digestive system (the presence of the gallbladder, expansion of the small intestine, reduction in large intestine). It is the unsupported hypothesis that dietary fat (especially animal and tropical fats) contributes to weight gain and heart disease that is causing these metabolic disruptions to occur in the first place. Only recently have human societies attempted to consciously reduce their fat intake, and it is also in this time period that modern societies have experienced rapidly increasing rates of chronic metabolic dysregulation. I implore that the researchers who conducted this study reconsider their preconceived assumptions about fat and explore the anthropological and evolutionary evidence that fat (especially animal and tropical fats) is crucial to human health.

No competing interests declared.

RE: Response to: "May open up…future paths towards a general reduction in our fat intake"

sboesveldt replied to lardasss on 11 Feb 2014 at 10:53 GMT

You are absolutely right that this ability may have evolved from an ancient mechanism to ensure sufficient energy intake. especially in earlier days. This is also exactly what we stated in our abstract and introduction.
"The desire to consume high volumes of fat is thought to originate from an evolutionary pressure to hoard calories, and fat is among the few energy sources that we can store over a longer time period. From an ecological perspective, however, it would be beneficial to detect fat from a distance, before ingesting it."
"This physiological system would be an evolutionary benefit in times of food scarcity.
From an ecological perspective, however, it would be clearly advantageous to detect the fat content of food from a distance in order to maximize the chances of finding a source of calories"

However, because (fat) foods are nowadays available everywhere, we may consume more fat than recommended, and in that scenario, our findings can be seen as potentially helpful when trying to reduce fat intake.

No competing interests declared.