There are people who maintain eating habits undoubtedly harmful to their health and takes notable intake of fats, never gain weight. The mystery seems starting to be solved and it already has a name: "APOA5".
Apolipoprotein A-V is a protein in humans encoded by the APOA5 gene on chromosome 11. It is significantly expressed in liver and prsent in low concentration in the plasma. APOA5 has been identified to play an important role in lipid metabolism.
APOA5 is a gene that has been discovered at Tufts University, in the United States. APOA5 is responsible for metabolizing body fat and prevents obesity regardless of the amount consumed. This gene was found while looking for an explanation to the fact that many individuals, despite having a diet excessively rich in calories and fats, they never get fat. Looking to the future, in the opinion of the director of the Genomics and Nutrition Laboratory of the aforementioned Tufts University, the scientist J. M. Ordovas, thanks to findings like this, personalized nutritional recommendations can be made based on the genetic information of each individual. This type of study is called nutrigenomics. Nutritional genomics, also called as nutrigenomics, is a science studying the relationship between human genome, nutrition and human health.
Everything that enters the mouth makes you fat
What is really going to allow us to maintain an ideal weight throughout our lives is a correct ratio between consumption and calorie expenditure. The organism feeds to acquire the energy it needs to maintain and repair itself day by day. This energy is obtained from carbohydrates,proteins and fats. However, in order not to suffer from an imbalance in weight or nutrients, we must eat food in this case of appropriate calorie.
how many calories should we eat a day
We need a daily caloric intake of 2000-2500 calories in adult men and between 1500-2000 in the case of women. We invest 65% of these calories in the normal functioning of the liver, brain, heart and kidneys. Even if we spent our lives lying on the sofa, our body would need between 1000 and 1200 calories a day.
With respect to caloric consumption, as age increases, the metabolism slows down and needed calorie expenditure decrease.
Regarding the activities that make us consume more or fewer calories, we must banish the idea that exclusively associates caloric expenditure with the development of this task. It is uncertain that we all spend the same calories cleaning the windows, sitting or showering.
To really know what we invest our energy in, we must take weight and sex as a reference value. A man and a woman who weigh exactly the same and are doing identical activities do not consume the same calories: by default, the female sex invests 10% less energy. But, to find out what we spend our calories on , we have to do a simple mathematical operation: we have to multiply the calories used per minute by our weight.
For example, let's take the case of a couple. They are both sitting on the couch watching television. This activity involves an expense of 0.025 calories per minute and kilo of weight. The man weighs 80 kilos and the woman, 70. After an hour he will have consumed 120 calories compared to 94.5 of it. To this we will add that the man has also consumed, to maintain his metabolism, one calorie per hour and kilo of weight, while the woman has only spent 0.9.
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