Caucasians who avoid sun exposure more likely to be vitamin D deficient, study suggests

Caucasians who avoid sun exposure more likely to be vitamin D deficient, study suggests: Light-skinned people who avoid the sun are twice as likely to suffer from vitamin D deficiency as those who do not, according to a study of nearly 6,000 people. Surprisingly, the use of sunscreen did not significantly affect blood levels of vitamin D, perhaps because users were applying too little or too infrequently, researchers speculate.