Author Question: A factor that has significantly contributed to elimination of rickets in developed countries is: ... (Read 61 times)

sarasara · **on:** Aug 20, 2018

A factor that has significantly contributed to elimination of rickets in developed countries is:

a. an increase in outdoor activities.
b. an increase in use of sunscreens.
c. the availability of fresh produce year-round.
d. the wide use of vitamin Dfortified milk.

Question 2

One reason it is difficult to establish recommended requirements for vitamin D is because:

a. individual exposure to sunlight varies greatly.
b. it is present in so many foods.
c. individuals store it in large quantities.
d. the amount in food varies with the season.