Zinc
Zinc is an important trace element (symbol Zn) that is present
in every cell of the body. It participates in stimulating
the activity of approximately 100 different enzymes. Zinc
is needed for wound healing and tissue damage repair, as well
as for synthesis of DNA, and helps maintain a strong immune
system.
Zinc deficiency can occur when its intake is insufficient
or when it is poorly absorbed. Deficiency can occur in people
who consume large amounts of alcohol, as this decreases the
absorption of zinc. Zinc deficiency is described by weight
loss, hair, loss, diarrhea, poor wound healing, taste abnormality,
birth defects, poor growth and development, and mental lethargy.
Clinical studies have shown that zinc, combined with other
antioxidants, may delay the progression of age-related macular
degeneration. Dietary intake of zinc may help to strengthen
the immune system, and has been shown to impede the onset
of the flu. Zinc may also prevent or shorten the duration
of common cold symptoms. Persons taking zinc supplementation
should also be sure to get adequate copper, however, as zinc
apparently blocks copper absorption and may cause copper deficiency.
Zinc salts are effective against pathogens (due to the antimicrobial
action of the zinc ions) when directly applied. Pyrithione
zinc is topically used to treat seborrheic dermatitis
of the scalp and other skin conditions such as eczema, athlete's
foot and vitiligo. Despite FDA regulation 21 CFR 358.750 (which
disallows product claims for eczema and psoriasis), many consumers
continue to use pyrithione zinc for the treatment of these
conditions with good results.
Zinc can be found in beef, lamb, crab, oysters, nuts, almonds,
whole grains, pumpkin seeds, sunflower seeds and buckwheat.
Health benefits of zinc
- Assists in the production of DNA and RNA
- Has antimicrobial properties
- Reduces inflammation
- Assists in hormonal metabolism
- Helps maintain a healthy immune system
- Helps fight the common cold and flu
- Helps in wound healing
Recommendations
RDI/AI – 11mg per day
UL – 40 mg per day
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Principal Author: M. Ofiyeva
Date of Initial Publication: 07/05/2007
Article Last Updated: 03/10/2011