引导语：下面是小编整理的关于食品行业的英语阅读，在食品行业的同志们可以认真阅读一下，小编觉得对大家很有帮助。
Nutriton
what we eat as well as how much we eat determine our nutrition status to an important extent， and influenced by a diversity of external and internal factors.
the person who wants to fine the answer to the question" what should i eat for good nutrition? “，might easily become lost in the maze of informational corridors， confused by the wealth of technical information provided by scientists or mislead by simplistic answers provided by those with products to sell.somewhere in between is some reasonable， commonsense information that we can use to guide us our quest for sound nutrition knowledge
to begin， we need to learn some definitions of commonly used nutrition terms and find out what sorts of guidelines are available to help us measure the quality of our diets and to develop healthful eating patterns.
nutrition and food： definitions
the word nutrition is often paired with the word food because the two go together. they are interdependent， but not interchangeable.
food might be defined as any edible substance that provides nourishment when consumed. it is made up of many natural ingredients all chemicals that have different functions such as providing odor， flavor， color， and nourishment. the ingredients that give us nourishment are called nutrients.
these nutrients are categorized as fats， proteins carbohydrates (sugars and starches)， minerals， vitamins， and water. they are called essential nutrients because we cannot get along without them. we need them for energy， for building and maintaining body tissue; and for regulating body processes the three essential functions of foods in the body.
nutrition might be defined as the process whereby we obtain the essential nutrients and use them to make many other substances our bodies need， this process would include eating and digesting food and absorbing and using， or metabolizing， the nutrients it contains.
we can obtain all of the essential nutrients from food. however， it is possible to obtain nourishment without eating and digesting food-if， for example， the nutrients are injected directly to our veins as in intravenous feeding.
thus， it is the nutrients that are essential and the food that normally provides them. since food is vital， we need to know the nutritive content of foods， which ones are the best sources of the various nutrients and how to combine them into a healthful diet.
the term good nutrition implies that we are obtaining from our food all of the essential nutrients in the amounts needed to keep our bodies functioning and to maintain optimum health. a very simplified definition of good nutrition might be" eating the right foods in the right amounts.“
the work of nutrition scientists involves finding in the body， the amount of each that we need， what happenings when we receive too much or too little and about food and died-what foods we should eat and in what amount.
yet nutrition science in its broadest sense has many more facets： the influence of sensory factors of flavor， color， and texture of food on eating behavior; the psychological， cultural， emotional， and social aspects of food intake; and even the economics of food availability and consumer behavior in the purchase of food
the nutrients
to date， nutrition scientists have identified some 40 to 45 substances as essential nutrients. but the list is growing as new nutrients continue to be identified; the history of nutrition science contains fascinating stories about the ways food substances have been identified as essential nutrients. in some instances， medical researchers seeking the cause of a particular disease found that problem was due to a single substance， and that when this substance was added to the diet， the symptoms of the disease disappeared. a number of vitamins were discovered in this way.
