CHAPTER ONE
1.0INTRODUCTION
In science and human medicine,
nutrition is the science or practice of consuming and utilizing foods.
Agriculture and food security' and 'Bioscience for health' are two of our key
strategic priorities. Understanding what constitutes safe and healthy food is,
therefore, an important area which spans both these themes.
Elucidating the interactions between
food, its nutritional content and human physiological systems represents a
multidisciplinary challenge with key public health and economic impacts. The
health consequences of changing diets and dietary habits represent an
unsustainable social and economic burden, yet many of the mechanisms
underpinning the effects of food and nutrition on long-term and acute health
remain under-investigated. Foods must be produced which take account of human
nutritional requirements and could include changing the availability of certain
foods, enhancing the nutritional content of foods, reformulation or a
combination of these. Innovation in the food industry depends upon underpinning
research to inform product development and processing strategies to enhance
safety and health benefits.
In delivering healthier and more
nutritious foods, it is crucial that we are cognisant of food safety. Issues
around microbial and chemical contamination in the production chain,
authenticity and provenance must be considered when modifying diets and
production processes, and when developing strategies to make existing diets
safer.
Addressing the nutritional and
safety challenges facing the UK and the world will require solutions which
encompass the whole food chain. Multidisciplinary approaches which harness
expertise across the BBSRC research space from soil, crop and livestock science
to food science, food safety, and human physiology are, therefore, strongly
encouraged, as are proposals at the interface with other Research Councils
(provided the majority of the work falls within our remit).
Predicting and assessing potential
adverse human health impacts arising from compositional changes in foods
modified by a number of methods, including the genetic engineering of foods,
are challenging. Adverse consequences could be narrow in occurrence or diverse
and widespread and, because they are unintended, will be unexpected. Foods that
could be modified in composition as a result of agricultural biotechnology, as
defined in this chapter and described in Chapters 2 are of interest because of
the growing awareness that commonly consumed food constituents and complex
mixtures can be beneficial or harmful to health.
Estimates based on population-based
research indicate that approximately one-third of preventable morbidity and
mortality is of dietary origin and/or a consequence of low levels of physical
activity. In contrast to such long-term consequences, acute toxicities of
dietary origin appear to pose a relatively small population health burden.
Acute food toxicities may be very severe, but they generally affect much
smaller numbers of people and can be associated rapidly with the food source,
so that they usually can be controlled relatively easily
1.1 BACKGROUND OF THE RESEARCH
Nutrition is the science that
interprets the interaction of nutrients and other substances in food (e.g.
phytonutrients, anthocyanins, tannins, etc.) in relation to maintenance,
growth, reproduction, health and disease of an organism. It includes food
intake, absorption, assimilation, biosynthesis, catabolism and excretion.
The diet of an organism is what it
eats, which is largely determined by the availability, the processing and
palatability of foods. A healthy diet includes preparation of food and storage
methods that preserve nutrients from oxidation, heat or leaching, and that
reduce risk of food-born illnesses.
A poor diet may have an injurious
impact on health, causing deficiency diseases such as blindness, anemia,
scurvy, preterm birth, stillbirth and cretinism; (Whitney, Ellie and Rolfes,
Sharon Rady (2013). Understanding Nutrition (13 ed.). Wadsworth, Cengage
Learning. pp. 667, 670. ISBN 978-1133587521) health-threatening conditions like
obesity (Obesity and Overweight for Professionals: Causes | DNPAO | CDC.
Cdc.gov (2011-05-16). Retrieved on 2011-10-17.) and metabolic syndrome;[8] and
such common chronic systemic diseases as cardiovascular disease,[9] diabetes,(
Diabetes Diet and Food Tips: Eating to Prevent and Control Diabetes.
Helpguide.org. Retrieved on 2011-10-17.) and osteoporosis. A poor diet can
cause the wasting of kwashiorkor in acute cases, and the stunting of marasmus
in chronic cases of malnutrition. Academy of Nutrition and Dietetics. Retrieved
May 9, 2015.
The list of nutrients that people
are known to require is, in the words of Marion Nestle, "almost certainly
incomplete". (Nestle, Marion (2013) [2002]. Food Politics: How the Food
Industry Influences Nutrition and Health.) As of 2014, nutrients are thought to
be of two types: macro-nutrients which are needed in relatively large amounts,
and micronutrients which are needed in smaller quantities. A type of
carbohydrate, dietary fiber, i.e. non-digestible material such as cellulose, is
required, for both mechanical and biochemical reasons, although the exact
reasons remain unclear. Other micronutrients include antioxidants and
phytochemicals, which are said to influence (or protect) some body systems.
Their necessity is not as well established as in the case of, for instance,
vitamins.
Most foods contain a mix of some or
all of the nutrient types, together with other substances, such as toxins of
various sorts. Some nutrients can be stored internally (e.g., the fat-soluble
vitamins), while others are required more or less continuously. Poor health can
be caused by a lack of required nutrients or, in extreme cases, too much of a
required nutrient. For example, both salt and water (both absolutely required)
will cause illness or even death in excessive amounts
Poor nutrition is a chronic problem
often linked to poverty, poor nutrition understanding and practices, and
deficient sanitation and food security. Lack of proper nutrition contributes to
lower academic performance, lower test scores, and eventually less successful
students and a less productive and competitive economy. Malnutrition and its
consequences are immense contributors to deaths and disabilities worldwide.
Promoting good nutrition helps growth, promotes human development and advances
economic growth and eradication of poverty.
1.2 OBJECTIVES OF THE STUDY
To support world-class research
which will advance understanding of the way in which safe and healthy foods can
be sustainably generated, and how nutrients, foods and whole diets interact
with biological systems to promote health.
This research under this priority
also seek to achieve and increase mechanistic biological understanding of:
1.how food nutrition can optimize
health status and reduce disease risk
2.how diet interacts with external
and internal factors to modulate phenotypic responses that influence health
3.the contribution of dietary
patterns, individual nutrients, whole and processed foods and food structures
to promoting and maintaining health
4.individual behavioral responses
and attitudes toward food, nutrition and health
5.how to reduce risks to human
health from the contamination of food by pathogens, toxins or other harmful
substances at any stage of the food-chain
1.3 SIGNIFICANCE OF THE STUDY
The outcome of this research work
will be of beneficial help to most of the household as it will promote and
highlight them on food nutrition and how to balance their daily food.
This research study will significantly stabilize the food diet and level
of consumption, to put a moderate food eating habit that eill help to regulate
the growth and health of families.
1.4LIMITATION OF THE STUDY
In times as such, where there is a
financial crisis within the nation, this have greatly contributed to the main
source of limitation to this research work, as the researcher was faced with
financial constrain and could not successfully visit place needed to for the
course of this study. Also, an access to the information needed for this
study was a problem.
1.5DEFINITION OF TERMS
Nutrition: nutrition is the
combination of processess by which the living organism receives and use the
food materials necessary for growth maintenance of function and repair
components parts
Nutrition: A science of food and its
relationship to health and concerned with the part played by food factor
(nutrients) in body growth, development and maintenance.
Protein: Protein is a body building
material for all body parts, such as muscle, brain, blood skin, hair, nails,
bones and body fluids, which constitutes about 20% of the adult body weight and
made up of amino acids which main sources are from animal source like milk,
eggs, meat, fish, cheese etc, and plant sources like pulses, cereals, beans,
nuts, soya beans etc.
Health is the level of functional or
metabolic efficiency of a living organism. In humans it is the ability of
individuals or communities to adapt and self-manage when facing physical,
mental or social challenges.
Diet: In nutrition, diet is the sum
of food consumed by a person or other organism especially a balanced food
having all the nutrients needed by the body system.
REFERENCE
Tymoczko JL, Stryer L (2002).
Biochemistry (5th ed.). San Francisco: W.H. Freeman. p. 603. ISBN
0-7167-4684-0.
Otto, H (1973). Diabetik Bei
Diabetus Mellitus. Bern: Verlag Hans Huber.
Crapo, P; Reaven, Olefsky (1977).
"Postprandial plasma-glucose and -insulin responses to different complex
carbohydrates". Diabetes 26 (12): 1178–1183.
doi:10.2337/diabetes.26.12.1178. PMID 590639.
Guthrie HA. There's no such thing as
“junk food,” but there are junk diets. Healthline 1986;5:11–2.
Kant AK. Indexes of overall diet
quality: a review. J Am Diet Assoc 1996;96:785–91. CrossRefMedline
Kennedy ET, Ohls J, Carlson S,
Fleming K. The Healthy Eating Index: design and applications. J Am Diet Assoc
1995;95:1103–8. CrossRefMedline
Haines PS, Siega-Riz AM, Popkin BM.
The Diet Quality Index revised a measurement instrument for populations. J Am
Diet Assoc 1999;99:697–704. CrossRefMedline
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