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ZINC.pptx

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EmmanuelSimonMarino

Zinc is an essential micromineral that is present in all cells and tissues of the body. It plays important roles in growth, development, immunity, and the metabolism of protein and nucleic acids. The recommended daily allowance of zinc varies depending on age and gender. Good dietary sources include oysters, meat, poultry, eggs, dairy products, and nuts. Both zinc deficiency and toxicity can cause health issues, with deficiency linked to impaired growth and development.

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Micromineral ZINC
Normal healthy adult contains 1.5-2.5g zinc. Present in all cells, tissues, organs, fluids and secretions. 90% of zinc is in muscle and bone. Blood plasma contains 0.1% zinc. Zinc plasma level is about 96ug/100ml in adults and 8.9ug/100ml in children.
Functions Essential for normal growth, development, reproduction and immunity. Involved in maintaining appetite, assisting in the perception of taste and for night vision. Humans and animals contain about 200 enzymes whose activity depends on the presence of zinc. Considered as an antioxidant nutrient. Essential for the metabolism of protein and nucleic acids. Maintenence and replication of DNA and RNA. Involved in cholesterol transport and in maintainig the stability of lipids within the cell membrane.
RDA Group Zinc (mg/day) Man 14 Woman 11 Pregnancy 12 Lactating 12 Infants - 6-12 months 2 Children 1-3 years 2.5 4-6 years 3.7 7-9 years 4.9 Boys 10-12 years 7 13-15 years 11.9 16-18 years 14.7 Girls 10-12 years 7.1 13-15 years 10.7 16-18 years 14.7
Sources Zinc status of soil determines the concentration of zinc in foods. FAO rated India low in ratings soil for zinc concentration. Oysters 1mg/g Meat, poultry, eggs and dairy products are the best sources. Outer layer of grains also contributes to zinc. Nuts contain high amount of zinc.
Toxicity An acute toxicity with 1-2g of zinc sulphate can produce metallic taste, nausea, vomiting, epigastric pain, abdominal cramps and bloody diarrhoea.
Deficiency Some of the factors of zinc deficiency are excessive phytates and phosphates in diet, malabsorption, hepatitis, chronic blood loss, trauma, alcoholic liver disease, surgery, burns, excessive sweating etc. Acrodermatitis enteropathica Disorder of zinc metabolism. Severe dermatitis appear in the first few months of an infants life, when the infant is switched from mothers milk to cows milk.
Premature infants and PEM (Protein Energy Malnutrition) children are susceptible to zinc deficiency. The clinical manifestations include growth retardation, male hypogonadism (a condition in which the body doesn't produce enough of the hormone that plays a key role in masculine growth and development during puberty (testosterone) or enough sperm or both) in the adolescents, rough skin, poor appetite, mental

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ZINC.pptx

  • 2. Normal healthy adult contains 1.5-2.5g zinc. Present in all cells, tissues, organs, fluids and secretions. 90% of zinc is in muscle and bone. Blood plasma contains 0.1% zinc. Zinc plasma level is about 96ug/100ml in adults and 8.9ug/100ml in children.
  • 3. Functions Essential for normal growth, development, reproduction and immunity. Involved in maintaining appetite, assisting in the perception of taste and for night vision. Humans and animals contain about 200 enzymes whose activity depends on the presence of zinc. Considered as an antioxidant nutrient. Essential for the metabolism of protein and nucleic acids. Maintenence and replication of DNA and RNA. Involved in cholesterol transport and in maintainig the stability of lipids within the cell membrane.
  • 4. RDA Group Zinc (mg/day) Man 14 Woman 11 Pregnancy 12 Lactating 12 Infants - 6-12 months 2 Children 1-3 years 2.5 4-6 years 3.7 7-9 years 4.9 Boys 10-12 years 7 13-15 years 11.9 16-18 years 14.7 Girls 10-12 years 7.1 13-15 years 10.7 16-18 years 14.7
  • 5. Sources Zinc status of soil determines the concentration of zinc in foods. FAO rated India low in ratings soil for zinc concentration. Oysters 1mg/g Meat, poultry, eggs and dairy products are the best sources. Outer layer of grains also contributes to zinc. Nuts contain high amount of zinc.
  • 6. Toxicity An acute toxicity with 1-2g of zinc sulphate can produce metallic taste, nausea, vomiting, epigastric pain, abdominal cramps and bloody diarrhoea.
  • 7. Deficiency Some of the factors of zinc deficiency are excessive phytates and phosphates in diet, malabsorption, hepatitis, chronic blood loss, trauma, alcoholic liver disease, surgery, burns, excessive sweating etc. Acrodermatitis enteropathica Disorder of zinc metabolism. Severe dermatitis appear in the first few months of an infants life, when the infant is switched from mothers milk to cows milk.
  • 8. Premature infants and PEM (Protein Energy Malnutrition) children are susceptible to zinc deficiency. The clinical manifestations include growth retardation, male hypogonadism (a condition in which the body doesn't produce enough of the hormone that plays a key role in masculine growth and development during puberty (testosterone) or enough sperm or both) in the adolescents, rough skin, poor appetite, mental