6 Chapter 1 Mineral and vitamin fortification
suffer from a decrease of hydrochloric acid in the stomach. Iron
deficiency is connected to increased mortality of elders because a
low level of iron increases the risk from heart disease. In the event
of operations or injuries, the appearance of anemia is a natural
consequence.
Symptoms of iron deficiency include anemia, fatigue, in-
creased heart work, gasping, decreased concentration, diz-
ziness, disturbed sleep, hard menstrual pains and bleeding,
chapped lips, eye infection, mouth ulcers and, hair loss. Iron de-
ficiency can cause sleeping problems, headaches, rheumatoid
arthritis, sand syndrome, seized legs, sweating, unconscious-
ness, decreased efficacy and decreased productivity at work, and
daytime sleepiness. Iron deficiency causes the difficulties dur-
ing physical and brain work, decreases the immune response,
and causes anemia, muscle pain, headache, and hair loss (Lieu
et al., 2001 ).
Low level of iron in blood plasma can cause skin itching, par-
ticularly in elders. Nails become soft, brittle, and white.
Iron in food can be found in the form of Fe
3+
ions, and it is
tightly bound to organic molecules. Good iron sources are meat,
particularly liver, beans, walnuts, dry fruits, chicken, fish, and
shellfish. Cooking in iron dishes can increase the iron quantity as
much as 20%, but the iron in this form is difficult to metabolize.
Long cooking in this kind of pan causes more iron to be embed-
ded into food. Replacement of iron pots with aluminum, stainless
steel, and plastic pots decreases iron intake.
Persons who do not eat red flesh, the best source of iron, as
part of their diet must increase the content of plant food with
dark green leaves, beans, and wheat. Vegetarians should take an
increased quantity of vitamin C, which assists in iron absorption.
2.3 Zinc
Zinc is involved in enzymatic reactions in humans. Its role is
mainly in the synthesis and stabilization of genetic material. It is
also necessary for cell division, and synthesis and degradation of
hydrocarbons, lipids, and proteins (Osredkar and Sustar, 2011).
Being a part of the enzyme copper-zinc superoxide dismutase,
it helps protect cells and some compounds from harmful effects
caused by free radicals ( Plum et al., 2010 ).
Zinc is necessary for the structure and normal function of cell
membranes. It takes part in the formation of binding tissue, teeth,
bones, nails, and skin. It plays an important role in the incorpora-
tion of calcium into the bones and influences the action of grow-
ing hormones ( Nriagu, 2007 ).