ZINC
Zinc (Zn) is a
transition metal belonging to group 12 of the periodic table. As an
"essential trace element" zinc has substantial biological importance
for plants and animals. And, is one of the most abundant to be
found in the body. It is naturally found in some foods, added to others
and also available as a dietary supplement.
Zinc is
responsible for a number of different functions in the human body and it helps
stimulate the activity of 100 different enzymes. You
have approximately 2-3g with around 60% is in the muscles that support your
skeleton and 30% is in the bones. So if nothing else zinc plays an
important part in keeping you upright. The remaining 10% is found in the
teeth, hair, nails, skin, liver, leukocytes (white blood cells), prostate,
sperm and testes. However, high concentrations of zinc are in the prostate
gland and semen.
It is vital for many biological functions and plays a crucial
role in more than 300 enzymes in the human body. According to medicalnewstoday
“zinc deficiency is responsible for over 800,000 childhood deaths” in the world every year.
THE IMPORTANCE OF ZINC
Research has shown that supplementation of zinc can increase
sperm count, normal levels of serum testosterone, motility and morphology. It plays
a vital role in fertility. In males, zinc protects the prostate gland from infection
(prostatitis) and ultimately from enlargement (prostatic hypertrophy).
In females, zinc
can help treat menstrual problems and alleviate symptoms associated with
premenstrual syndrome (PMS).
Others are:
It is an essential component/cofactor for more than 300 enzymes involved in the synthesis and metabolism of carbohydrates, lipids, proteins, nucleic acids and other micro-nutrients.
It stabilizes cellular components and membranes and so is important for cell and organ structure and integrity.
It is essential for cell division and is needed for normal growth and development during pregnancy, childhood and adolescence. It is involved in DNA synthesis and the process of genetic expression.
It is important for immune function (both cellular and humoral immunity).
It is involved in wound healing and tissue repair.
It helps in attacking infected or cancerous cells.
It helps in controlling and regulating immune responses.
Others are:
It is an essential component/cofactor for more than 300 enzymes involved in the synthesis and metabolism of carbohydrates, lipids, proteins, nucleic acids and other micro-nutrients.
It stabilizes cellular components and membranes and so is important for cell and organ structure and integrity.
It is essential for cell division and is needed for normal growth and development during pregnancy, childhood and adolescence. It is involved in DNA synthesis and the process of genetic expression.
It is important for immune function (both cellular and humoral immunity).
It is involved in wound healing and tissue repair.
It helps in attacking infected or cancerous cells.
It helps in controlling and regulating immune responses.
SOURCES OF ZINC
Dark chocolate
Lamb
Peanuts
Crab
Pulses,
nuts and legumes
Wholegrain
cereals Red meat and poultry (these are the main sources of zinc for many)
Oysters, crab, lobster and other shellfish
(oysters contain more zinc per serving than any other food).
SOME COMMON ZINC DEFICIENCY
SIGNS.
Stretch marks
Acne
White
spots on the nails
Poor
growth – mostly in children
Hair
loss
Anorexia
Poor
wound healing
Poor
immunity
Poor
night vision
Dry skin
Note: Zinc is absorbed
in the small intestine and is excreted via the kidneys, skin and intestine (in
faeces) and there are no body stores of zinc and so daily intake of zinc is
needed to maintain adequate body levels. The recommended daily zinc intake ranges
from 7mg -25mg.
The
Food Standards Agency and the Department of Health in the UK advise that intake
of zinc should not exceed 25 mg per day.


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