1.How important nutrition affects our health:
Shih, Meng Yun
Nutrition is the intake of food, considered in relation to the body’s dietary needs.
Good nutrition – an adequate, well balanced diet combined with regular physical
activity – is a cornerstone of good health. Poor nutrition can lead to reduced
immunity, increased susceptibility to disease, impaired physical and mental
development, and reduced productivity.
2. Introduction to basic nutrition:
Proteins are part of every cell, tissue, and organ in our bodies. These body
proteins are constantly being broken down and replaced. The protein in the foods we
eat is digested into amino acids that are later used to replace these proteins in our
bodies. Protein is found in the following foods: meats, poultry, fish, legumes (dry
beans and peas), tofu, eggs, nuts and seeds, milk and milk products, grains, some
vegetables, and some fruits (provide only small amounts of protein relative to other
b. lipid: Most of the lipid found in food is in the form of
triglycerides which are fatty acid esters of glycerol. Other types of dietary lipids are
cholesterol and phospholipids. Lipids are a concentrated source of energy providing
more than double the amount on a per-weight basis than that contained in either
carbohydrates or proteins. They help maintain body temperature through both their
insulating effects and the heat generated from their oxidation. The food contains lipids
are meats, breads,
cheeses, milk, and more.
c. carbohydrate: Carbohydrates are the major source of energy
for the body. They are composed mostly of the elements carbon
, hydrogen and oxygen. The body utilizes most carbohydrates to
generate glucose, which serves as the basic functional molecule
of energy within the cells of the human body. When the supply of
carbohydrates is too low to adequately supply all the energy needs of the body,
from proteins are converted to glucose. Examples of foods high in complex
carbohydrates include potatoes, beans, and vegetables.