EBOOK GIZI
Introduction to nutrition and metabolism. Edition 6
Introduction to Nutrition and Metabolism
The food we eat has a major effect on our physical health and psychological well-being.
The Global Burden of Diseases, Injuries and Risk Factors Study has attributed over
10 million deaths globally in 2017 to dietary risk factors. In the United Kingdom, dietary
risk factors are second only to alcohol and drug abuse in behavioral risk factors for death.
Furthermore, all of the prominent metabolic risk factors – overweight and obesity, high
blood pressure, high serum cholesterol levels and high levels of glucose in the blood – are
influenced by the quality of our diet.
Therefore, understanding how nutrients are metabolized in the body and how they
influence our metabolic status are key to our relationship with food, and for the prevention
and management of diet-related disease. Consequently, an understanding of the principles
of biochemistry is imperative to our understanding of the scientific basis of what we would
call a prudent or healthy diet.
The aim in the following pages is both to explain the conclusions of the many expert
committees that have deliberated on the problems of nutritional requirements, diet and
health over the years, and the scientific basis on which these experts have reached their
conclusions. Much what is now presented as “facts” may well be shown to be incorrect in
years to come. This book is intended to provide a foundation of scientific knowledge and
understanding on which to interpret and evaluate future advances in nutrition and health
sciences.
Nutrition is one of the basic sciences that underlie a proper understanding of health
and medical and human sciences and the ways in which human beings and their environ-
ment interact. In its turn, the science of nutrition is based on biochemistry and physiology,
on one hand, and the social and behavioral sciences, on the other hand. This book contains
such biochemistry as is essential to an understanding of the science of nutrition.
In a book of this kind, which is an Introduction to Nutrition and Metabolism, it is
not appropriate to cite the original scientific literature which provides the (sometimes
conflicting) evidence for the statements made; in some of the tables in this book, we have
acknowledged our sources of data as a simple courtesy to our follow scientists, and also to
guide readers to the original sources of information.
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