OBJECTIVE: Claims have been made that sun protection may negatively affect vitamin D status, but very few data are available about whether this applies to people in uncontrolled settings. METHOD: In 1996 we measured 25(OH)-vitamin D concentrations in 1113 adults in Nambour, a subtropical community, who reported their concurrent sun protection behaviours in a skin cancer prevention trial. Estimates were adjusted for time outdoors, vitamin D intake and other factors known to affect vitamin D status. RESULTS: Persons who tended to stay in the shade had lower vitamin D levels than those who never stayed in the shade (62.5 vs. 68.8 nmol/L respectively, p=0.01), and this association remained in persons who spent less than 50% (p=0.02) but not in those who spent more than 50% of their time outdoors. Wearing a hat, long sleeves, sunglasses and use of sunscreen or umbrella were not associated with vitamin D status after adjustments, including after stratification by time outdoors. CONCLUSION: Sun protection behaviour to reduce the risk of skin cancer can be maintained without affecting vitamin D serum status, although consistently seeking shade when spending less than 50% of daytime outdoors is associated with lower vitamin D levels.
OBJECTIVE: Claims have been made that sun protection may negatively affect vitamin D status, but very few data are available about whether this applies to people in uncontrolled settings. METHOD: In 1996 we measured 25(OH)-vitamin D concentrations in 1113 adults in Nambour, a subtropical community, who reported their concurrent sun protection behaviours in a skin cancer prevention trial. Estimates were adjusted for time outdoors, vitamin D intake and other factors known to affect vitamin D status. RESULTS:Persons who tended to stay in the shade had lower vitamin D levels than those who never stayed in the shade (62.5 vs. 68.8 nmol/L respectively, p=0.01), and this association remained in persons who spent less than 50% (p=0.02) but not in those who spent more than 50% of their time outdoors. Wearing a hat, long sleeves, sunglasses and use of sunscreen or umbrella were not associated with vitamin D status after adjustments, including after stratification by time outdoors. CONCLUSION: Sun protection behaviour to reduce the risk of skin cancer can be maintained without affecting vitamin D serum status, although consistently seeking shade when spending less than 50% of daytime outdoors is associated with lower vitamin D levels.
Authors: Shiao Wei Quah; Hazreen Abdul Majid; Nabilla Al-Sadat; Abqariyah Yahya; Tin Tin Su; Muhammad Yazid Jalaludin Journal: PLoS One Date: 2018-07-19 Impact factor: 3.240
Authors: T Passeron; R Bouillon; V Callender; T Cestari; T L Diepgen; A C Green; J C van der Pols; B A Bernard; F Ly; F Bernerd; L Marrot; M Nielsen; M Verschoore; N G Jablonski; A R Young Journal: Br J Dermatol Date: 2019-07-15 Impact factor: 9.302