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INTRODUCTION TO HUMAN NUTRITION

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reissa tindoy

on 27 November 2015

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Transcript of INTRODUCTION TO HUMAN NUTRITION

INTRODUCTION TO HUMAN NUTRITION
Introduction and Definition of Terms
is the science of foods and their components (nutrients and other substances) including the relationship to health and disease; processes within the body; and the social, economic. cultural and psychological implications to eating.
is the relationship of foods to the health of the human body and this concerns the actions, interactions, and balances of nutrients.
is the study of how food nourishes the body.
Nutrient Distribution in the Body
Nutritional Physiology
NUTRITION
ESSENTIAL NUTRIENTS
an EN cannot be manufactured in the body in adequate amounts needed for specific functions.
an EN is linked to a specific deficiency disease.
not all nutrients are essential for all species of animals.
the study of essentiality for a nutrient is a continuous process.
NUTRITURE
or nutritional status
the condition of how well-nourished the human body, depends on several criteria such as:
1. physical signs and symptoms of good nutrition
2. medical history
3. blood and urine tests
4. anatomical changes seen in imaging or x-rays and other medical instruments
5. history of dietary intake up to current food habits
MALNUTRITION
is an undesirable state of one's health, which could either be an undernourished individual or someone who is overnourished.
FOOD
any substance consumed to provide nutritional support for the body.
"60-20-20" RULE
WATER
about 60% of total body weight
FAT
about 20% of total body weight
Combination of mostly PROTEIN plus CARBOHYDRATES, MINERALS & VITAMINS
about 20% of total body weight
The Scope of Nutrition and its Relationship with Other Discipline
NUTRITION
PHYSICAL SCIENCES
particularly chemistry because the human organism is a complex of interdependent systems, all of which operate using chemicals provided by foods.
BIOLOGICAL SCIENCES
of anatomy and physiology help us to see how growth and development of cells and organs, physical fitness and well-being are affected by nutrition -how nutrition relates with body functioning to promote health and wellness throughout the life cycle.
BEHAVIORAL SCIENCES
to better understand how nutrition is interwoven with our unique nature as human beings.

THE DIGESTIVE SYSTEM
CIRCULATION OF NUTRIENTS AND OTHER SUBSTANCES
Learning Objectives
state the definition of nutrition.
explain the basic terms in the study of nutrition.
describe how nutrients are distributed in the human body.
familiarize with the scope of nutrition and its relationship with other disciplines.
explain the basic concepts of nutrition.
have an overview of nutrition as a dynamic science and its significance in the quality of life.
Basic Concepts of Nutrition
Essential nutrients are needed throughout life; only the amounts of nutrients needed change.
No single food contains all the essential nutrients in amounts needed for optimum health.
Good nutrition is essential for the following:
1. growth
2. normal organ development and functioning
3. normal reproduction
4. maintenance and replacement of worn-out cells and tissues
5. optimum activity level and working efficiency
6. resistance to infection and disease
7. the ability to repair bodily damage or injury
Proper nutrition means that all essential nutrients are supplied and utilized in adequate balance to maintain optimal health and well-being.
Most people are interested in how to be assured that they get the proper nutrients in the amounts needed from daily meals and snacks.
All of the nutrients most of us need can be obtained by eating a variety of different types of foods.
Nutrients are important chemical substances that work together and interact with the body chemicals to perform one or more functions.
Water is the most important nutrient.
Fundamental Principles of Nutrient Interaction
1. Individual nutrients have many specific metabolic functions, including primary and supporting roles.

2. No nutrient ever works alone.
Metabolism of Nutrients
Excretion of Waste Products
Individuals At Risk from Poor Nutritional Intake
1. Infants
2. Preschool Children
3. Adolescents
4. Pregnant Women
5. Elderly
10 Red Flags that Caution Individuals about Food Quakery
1. Claims promise a quick cure and sound too good to be true.
2. Recommendations are based on a single study and are of short duration.
3. Statements ignore differences among individuals.
4. Recommendations ignore possible disadvantages .
5. Food is advertised as a new and exclusive scientific breakthrough.
6. Lack of supporting studies and peer reviews that are reliable.
7. Use of disreputable publication sources.
8. Advertisements use vague terms, such as "health foods" and "cure-alls".
9. Use of statements that are partially accurate and exaggerating the truth.
10. Supporting studies make use of experimental animals, which may not be true for humans.
By: Reissa B. Tindoy, RND
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