Vitamin D Part 2

Question 1

What are the RDAs for Vitamin D for adults and children?

Answer 1

Adults is 600IU for normal and preg/lactating, and 400IU AI for children.

Question 2

What is the upper limit for Vit D and what condition is it linked to?

Answer 2

ranges from 1000-4000IU and is linked to hypercalcemia.

Question 3

List 3 groups at risk for deficiency?

Answer 3

Older adults, people with dark skin, and people who are obese.

Question 4

What is the best indicator for Vit D status and why?

Answer 4

serum [25(OH)D] is the best indicator because it has a long circulating half life (15days).

Question 5

Why is calcitriol not a good indicator of status?

Answer 5

It has a short half-life (<15 hours) and does not decreases until deficiency severe).

Question 6

What can cause Vit D toxicity and what can it lead it?

Answer 6

Excess INTAKE can lead to D intoxication which leads to hypercalcemia and eventually soft tissue calcification.

Question 7

A Vit D deficiency can cause ______ in children. What are the symptoms.

Answer 7

Rickets.
Softening of bones, short stature, and bone deformities.

Question 8

A Vit D deficiency in adults can cause ________. What is this condition?

Answer 8

Osteomalacia - poor mineralization of the collagen matrix. Can cause increased risk of fractures.