Vitamin C
Vitamin C is an essential vitamin
for humans. Vitamin
C plays a key role in the function
of the immune system. A deficiency of this vitamin can
impair the ability of the body to
fight off infection. Vitamin C has
been shown to increase the
resistance, as well as assist in
the healing process, of several
viral diseases and seems to have
the effect of inactivating the
viral particles. It is
equally apparent that
it is necessary for Vitamin C to
be taken to bowel tolerance to
have the most therapeutic effect.
One's bowel tolerance for Vitamin C
actually increases when persons
are presented with an active illness. [6,
7,
8]
Vitamin A
Vitamin A is one of the fat
soluble vitamins and is actually
composed of a related group of
compounds. Vitamin A is a nutrient,
critical for Embryonic
development, immune function,
vision, and may also have an
anticancer role, though its
mechanism is unclear. It has been
observed that in children with low
Vitamin A status exhibit a higher
rate of respiratory infections as
well as increased mortality from
infections. High doses of Vitamin
A have also been used for treating
viral infections in both children and
adults. Care must be taken when
higher doses of Vitamin A are
ingested. Hypervitaminosis A is a possible
complication and is a serious
condition, therefore doses must be
limited to only a few days
duration. [9,
10,
11]
Selenium
Selenium is a mineral that is
essential to the overall health of humans, as
it functions in a variety of
systems in the body, most notably, the immune system. Selenium
deficiency is associated with
decreases in immune function. Not
only does Selenium supplementation
prevent decreases in immune
function, it also increases the
activity of white blood cells that
help to fight off viral
infections. [12,
13]
Zinc
Zinc
is an essential nutrient that has
a key role in numerous
physiological functions, including
the immune system. Zinc may promote
the
destruction of foreign bacteria,
and help to scavenge free
radicals. Zinc deficiency can
result in the dysfunction of the T
cells of the immune system. Zinc
also assists the Thymus gland in its
function of stimulating and
coordinating the immune system. Zinc
may also directly inhibit the growth
of viruses. [14,
15]
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