Personal sun exposure and serum 25-hydroxy vitamin D concentrations

Author(s): Nair-Shalliker V, Clements M, Fenech M, Armstrong BK

Abstract

Solar ultraviolet-B radiation (UVB) is essential for epidermal vitamin D production. We aimed to quantitate the relationship between personal solar UV exposure and serum 25hydroxy vitamin D (25[OH]D) concentration. Blood was collected for 25(OH)D analysis in 207 South Australian adults aged 27–61 years. At the time of blood collection, each participant completed a questionnaire, which included a calendar for recall of sun exposure in the preceding 16 weeks. We examined the association between solar UV exposure and serum 25(OH)D graphically from smoothed scatter plots, and modeled it using multiple linear regression, with age, sex and body mass index as covariates. Estimated erythemal solar UV exposure in the 6 weeks before blood collection best predicted serum 25(OH)D concentrations. Serum 25(OH)D rose with increasing personal solar UV exposure to a maximum of about 89 nmol L−1 at an estimated mean weekly solar erythemal UV exposure of about 1230 mJ cm−2. The maximum was the same after accounting for clothing coverage and was reached at an estimated whole body equivalent exposure to ambient UV of ca 700 mJ cm−2. These results suggest that an average maximum serum 25(OH)D of ca 89 nmol L−1 is achieved from sun exposure in a healthy Australian adult population.

Similar Articles

Haute Autorite De Sante

Author(s): Strategie de prise en charge en cas de denutrition proteino-energetique chez la personne agee

who

Author(s): https://www

Vitamine D:effet osseux et extra osseux; recommandations de bon usage

Author(s): Briot K, Audran M, Cortet B, Fardellone P, Marcelli C, et al.

Etude du profil immunitaire de sujets âgés hospitalisés en unité de court séjour gériatrique

Author(s): Crétel E, Veena I, Pierres A, Binana Y, Robert P, et al.

Vitamin D deficiency

Author(s): Holick MF

Deficient production of 1,25-dihydroxyvitamin D in elderly osteoporotic patients

Author(s): Slovik DM, Adams JS, Neer RM, Holick MF, Potts JT

wikipedia

Author(s): http://en

Vitamin D deficiency in veiled Kuwait women

Author(s): El Sonbaty MR, Abdul Ghaffar NU

Clothing preference affects vitamin D status of young women

Author(s): Buyukuslu N, Esin K, Hizli H, Sunal N, Yigit P, et al.

Food sources of vitamin D and their association with 25-hydroxyvitamin D status in Dutch older adults

Author(s): Vaes AMM, Brouwer-Brolsma EM, Van Der Zwaluw NL, Van Wijngaarden JP, Berendsen AAM, et al.

Vitamin D status in Sri Lankans living in Sri Lanka and Norway

Author(s): Meyer HE, Holvik K, Lofthus CM, Tennakoon SU

Serum vitamin D concentrations among elderly people in Europe

Author(s): Van Der Wielen RP, Lowik MR, Van Den Berg H, de Groot LC, Haller J, et al.

Relationship between serum parathyroid hormone levels, vitamin D sufficiency, and calcium intake

Author(s): Steingrimsdottir L, Gunnarsson O, Indridason OS, Franzson L, Sigurdsson G

Vitamin D and body composition in the elderly

Author(s): Vitezova A, Muka T, Carola Zillikens M, Voortman T, Uitterlinden AG, et al.

Hypovitaminosis D among rheumatology outpatients in clinical practice

Author(s): Mouyis M, Ostor AJ, Crisp AJ, Ginawi A, Halsall DJ, et al.

Vitamin D status and arterial hypertension: a systematic review

Author(s): Pilz S, Tomaschitz A, Ritz E