In a nutshell:
Nickel is found in DNA and RNA (genes).
In-depth:
The human body contains about 10mg of nickel. Nickel is a vital trace element. Its biological function is not known. However it is known that RNA and DNA contain significant concentrations of nickel.
Requirement, deficiency, oversupply:
Nickel requirement is estimated to be about 50 µg per kg of the body weight and is usually covered in a well-balanced diet.
A nickel deficiency can decrease the haemoglobin count in the blood. In addition, the activity of various enzymes as well as the absorption of iron is affected.
Nickel can cause a contact allergy called nickel dermatitis (eczema on the hands). The allergy can be caused by various things including jewellery, jeans buttons, glasses frames etc.. Perspiration can exacerbate the allergy.
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Nickel in Food:
Plant foods contain more nickel than animal foods. Foods rich in nickel include nuts, legumes, wheat and wheat products, cocoa powder, chocolate and certain fruits and vegetables.
Nickel in 100 g Food:
Lentils: 300 µg
Peas: 200 µg
Green beans: 200 µg
Potatoes: 30 µg
Carrots: 30 µg
Units: 1.000.000 µg = 1 g
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Advanced Sports Nutrition-2nd Edition
Dan Benardot
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