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What Is Nutrition
“Nutrition is the study of the relationship between diet and states of health and disease. Between the extremes of optimal health and death from starvation, there are myriad disease states that can be caused or alleviated by changes in diet.”
From WikiPedia, the Free Encyclopedia.
As a science, it tries to understand how and why diets influence specific persons and their health. It is a fact that chemical compounds like water, lipids or proteins, DNA (Deoxyribonucleic acid or deoxyribose nucleic acid) or RNA (Ribonucleic acid), and carbohydrates (sugars) are being comprised by our body. Minerals are also present in the form of salts or electrolytes, or simply as calcium, iron and zinc in plants and organisms that we eat everyday.
The digestive system is our first way in turning all these chemical compounds into food available for the cells. Digestive juices that for an adult are close to 6 or 7 litters, first exit the internal body then are redirected to our digestive tract. Even if many compounds or elements are absorbed into the bloodstream unchanged, digestive juices release them from the food we eat and help breaking the remaining chemical bonds between ingested compounds. Any unabsorbed residues are then eliminated through the intestines, but only a small amount that was not reabsorbed, really exits the body otherwise our body would rapidly dehydrate. Examples for this kind of situation are the devastating effects of persistent diarrhea (“Diarrhea (AmE) or diarrhoea (CwE) is a condition in which the sufferer has frequent and watery or loose bowel movements” From WikiPedia, the Free Encyclopedia).
It has been proven that is hormonally and metabolically indicated to eat fresh unprocessed foods instead of diets based on processed foods as well as eating smaller meals more frequently. A better management of cell growth, mitosis (cell division) and maintenance is this way acquired.
Latest researches have revealed the various side effects of trans fatty acids, which now are introduced to the human diet with the technology of lipid hydrogenation. After observing the harmful effects of excess these acids while dieting, governments began banning them in the late 1990’s.
About longevity, researches have study and proved that is not the low food energy that increases it, but the efficient fat processing metabolism, and the long term efficiency of our organs. This way longevity is very strong related to the insulin sensitivity level, even if several other factors like a low body temperature tent to promote it.
The food processing industry has been in a continuous growth since the Industrial Revolution that occurred two hundred years ago. New technologies are being invented all the time and now more than ever these both help keep foods fresh longer and alter the fresh taste and state of food. The primary technology that keeps food fresh for longer is cooling, whereas some new ones tend to use other ways resulting not spoiled fresh food.
Such technologies are drying, salting, pasteurization or autoclavation. Among these pasteurization (“Pasteurization is the process of heating food for the purpose of killing harmful organisms such as bacteria, viruses, protozoa, molds, and yeasts. The process was named after its inventor, French scientist Louis Pasteur. The first pasteurization test was completed by Pasteur and Claude Bernard on April 20, 1862.” From WikiPedia, the Free Encyclopedia) and autoclavation (heating techniques) have improved the keeping and safety of common foods, thus preventing diseases such as epidemics.
Other food processing technologies have some downfalls which is understandable but the main issue remains that we have to eat more natural foods as the ones that have been kept fresh with these technologies have a sensitive lost of taste and vitamins.
Our health is the most important thing that we all should be concerned about, and nutrition is one of the most important issues today. A healthy nutrition with lots of fresh ailments which consists of vitamins, minerals and other chemical compounds is the best way to keep our body strong and healthy, the best way to feel good about ourselves and others.
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