In conclusion, vitamin D intake was inadequate in the
adult Spanish population aged 18–60 years. The combination
of insufficient sunlight exposure and an inadequate
intake of vitamin D may lead to a deficient vitamin D
status, increasing the risk of many of the diseases that
have been related to vitamin D deficiency. Therefore, an
increase in the consumption of foods rich in vitamin D
(e.g. oily fish, dairy products, cereals and other food
items fortified with vitamin D) appears to be necessary
for achieving an adequate intake of vitamin D. It may
also be important to consider the use of supplements
with vitamin D in those individuals who do not meet
67% of the DRI for vitamin D.