Which of the following is the most reliable source of vitamin D in the diet?
a. Meat
b. Fortified milk
c. Fruits and vegetables
d. Enriched breads and cereals
e. Whole grains
Question 2
Which of the following is a feature of vitamin D synthesis?
a. Tanning lamps and tanning booths do not stimulate vitamin D synthesis.
b. Sunscreens with sunburn protection factors of 2 and above prevent synthesis of vitamin D.
c. The ultraviolet rays of the sun are able to easily pierce heavy clouds and smog to promote vitamin D synthesis.
d. Dark-skinned people require longer sunlight exposure than light-skinned people to synthesize equivalent amounts of vitamin D
e. The risks of skin cancer often outweigh the benefits of sun exposure for very light-skinned people.