Vitamins D

Question 1

Vitamin D other names

Answer 1

Antirachitic vitamin
Cholecalciferol (vitamin D3 in animals)

Ergocalciferol
(vitamin D2; as D-fortified)

Calcitriol (active form in
kidney)

Calcidiol (active form in
liver)

Question 2

Vitamin D Chemistry

Answer 2

Exists in two forms in foods:

cholecalciferol
and ergocalciferol,
and produced by
UV light to 7-
dehydrocholester
ol (metabolite of
cholesterol)

Question 3

Vitamin D Function

Answer 3

• Promotes normal bone
  and teeth formation
• Regulates calcium and phosphorus homeostasis
• Gene regulation in
  chromosomal transcription rate

Question 4

1 IU of Vitamin D

Answer 4

is equivalent to
0.025 ug cholesterol

Question 4

Calcium, phosphorus, and calcitonin

Answer 4

for their absorption to
Vitamin D metabolism

Question 5

Vitamin K

Answer 5

in calcium-binding
proteins activated by
vitamin D

Question 6

Deficiency of vitamin D

Answer 6

Rickets
Osteomalacia
Osteopenia

Question 7

Rickets

Answer 7

are modeled on
soft and fragile bones, bowed legs, and body
deformation in chest, spine, and pelvis

Question 8

Osteomalacia

Answer 8

is calcium
deficiency

Question 9

Osteopenia

Answer 9

is loss of calcium
that causes reduced bone density

Question 10

Vitamin D Toxicity

Answer 10

Hypervitaminosis D –
caused by calcification
of kidneys and lungs,
nausea, weight loss,
and polyuria

Question 11

Food sources

Answer 11

• Fish liver oils
• Cod liver oils (richest)
• Butter
• Clams
• Oysters
• Eggs
• Sardines
• Vitamin D-fortified
  dairy (milk, margarine)