Zinc

Question 1

zinc food sources

Answer 1

• red meat
• seafood
• oysters
• poultry
• pork
• dairy
• whole grain
• vegetables

Question 2

zinc bioavailability

Answer 2

• animal- increased

- plant- decreased

Question 3

zinc digestion

Answer 3

• hydrolyzed from AA/nucleic acids

- HCl, proteases= stomach and SI

Question 4

zinc absorption enhancing factors

Answer 4

• low zinc

- endogenous substances

Question 5

zinc absorption inhibiting factors

Answer 5

• phytate
• oxalate
• polyphenols
• fibers

Question 6

zinc functions

Answer 6

• cofactor
• making gastric acid (bicarbonate)
• regulate gene expression
• growth
• immune system
• reproduction
• promoting wound healing
• CHO metabolism

Question 7

zinc RDA

Answer 7

-men= 11 mg
-women= 8 mg
-pregnant= 11 mg
-lactating= 12 mg
UL= 40 mg/d

Question 8

zinc deficiency

Answer 8

• degradation of zinc
• growth retardation
• skeletal abnormalities
• poor wound healing
• dermatitis
• delayed sexual maturation
• decreased appetite
• hair loss
• impaired immune function
• protein synthesis

Question 9

zinc toxicity

Answer 9

• acute:
• -225-450 mg
• -metabolic taste, nausea, vomit, bloody diarrhea
• chronic:
• -40 mg
• -Cu deficiency