The effect of regular sunscreen use on vitamin D levels in an Australian population. Results of a randomized controlled trial

Marks, Robin; Foley, Pat; Jolley, Damien; Knight, K.; Harrison, Jenna N.; Thompson, Sandra C.

doi:10.1001/archderm.131.4.415

Cited by 78 publications

(78 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Self-report of sunlight exposure using questionnaires has been shown to poorly correlate with more objective measures, such as dosimetry (31). While the application of sunscreen with a sun protection factor of 8 was shown in a controlled experiment to interfere with the cutaneous synthesis of vitamin D (32), 'real-life' trials have failed to document any correlation between sunscreen use and serum 25OHD levels, perhaps due to the inappropriate application of sunscreen (33,34).…”

Section: Discussionmentioning

confidence: 99%

Prevalence and predictors of vitamin D insufficiency in women of reproductive age living in northern latitude

Gagnon

Baillargeon

Desmarais

et al. 2010

European Journal of Endocrinology

View full text Add to dashboard Cite

Objective: This study assessed the prevalence of vitamin D deficiency (serum 25-hydroxyvitamin D (25OHD) %50 nmol/l) and insufficiency (serum 25OHD 51-74 nmol/l) during summer and the predictors of serum 25OHD in young women of reproductive age. Design: Cross-sectional study. Methods: Between May and September 2006, 153 healthy, ambulatory and essentially Caucasian women, aged 18-41 years, were recruited. Serum 25OHD and parathyroid hormone (PTH) levels were measured, and questionnaires were evaluated. Results: About 3.9% of women had serum 25OHD %50 nmol/l with an additional 26.8% in the insufficient range. Most women (56.9%) had their blood sampled in September. Month of blood collection significantly influenced serum 25OHD. Body mass index (BMI) was inversely associated with serum 25OHD, while traveling to a warmer climate during winter/spring and using oral contraceptive pills (OCP) were associated with higher serum 25OHD. Sunscreen was used by 77.8% of women, but only 3.3% reported consuming vitamin D supplements. BMI, serum PTH, travel to a warmer climate, and OCP use were independently and significantly associated with serum 25OHD, after adjustment for the month of sampling, and explained 40% of the variance in serum 25OHD. Conclusions: In Canada, the prevalence of vitamin D insufficiency is relatively high (30%) during summer in healthy women of reproductive age. Given the expected decrease in serum 25OHD during winter and the low consumption of vitamin D supplements, a high prevalence of vitamin D deficiency and insufficiency is to be anticipated during winter, except maybe for those traveling to a warmer climate.

show abstract

Section: Discussionmentioning

confidence: 99%

Prevalence and predictors of vitamin D insufficiency in women of reproductive age living in northern latitude

Gagnon

Baillargeon

Desmarais

et al. 2010

European Journal of Endocrinology

View full text Add to dashboard Cite

show abstract

“…45 A possible explanation for this conclusion is the well-documented fact that in actual use most individuals apply sunscreens at much lower concentrations than the concentration mandated for sunscreen SPF testing (0.5-0.8 mg/cm 2 in actual use vs 2 mg/cm 2 required for SPF determination), hence resulting in a significantly lower in-use SPF compared with the labeled SPF. [46][47][48] It has been shown that full body exposure of fair-skinned individuals to 10 to 15 minutes of midday summer sun is equivalent to one MED and resulted in the synthesis of approximately 15,000 IU/d of vitamin D 3 . 48 By this reasoning, exposure of 15% of the body surface area (eg, face, hands, and arms) to a level of one-third MED should result in cutaneous biosynthesis of 1000 IU/d of vitamin D 3 .…”

Section: What Should We Advise Patients On Photoprotection Practices mentioning

confidence: 99%

A Dermatologist's Perspective on Vitamin D

Vanchinathan

Lim

2012

Mayo Clinic Proceedings

View full text Add to dashboard Cite

“…However, we did account for reported sunscreen use in our estimates of oral vitamin D equivalent (Tables 3 and 4). Whether or not the adjustment for sunscreen use is valid is unknown as some evidence from the literature indicates sunscreen use does not reduce UVB exposures when self-applied (52)(53)(54)(55)(56) , although sunscreen applied under controlled research conditions at a sufficient thickness and sun protection factor can prevent significant increases in serum 25(OH)D from occurring (57) . Nevertheless, our estimates do support the idea that a substantial proportion of vitamin D comes from sun exposure in the warmer months relative to that from diet and supplements, even with adjustment for sunscreen use.…”

Section: Discussionmentioning

confidence: 99%

Reliability of self-reported sun exposure in Canadian women and estimation of lifetime exposure to vitamin D from sun and diet

Cook

Moon

Dong

et al. 2013

Public Health Nutr.

View full text Add to dashboard Cite

Objective: To assess the inter-method reliability of the Ovarian Cancer in Alberta (OVAL) survey developed to estimate adult vitamin D exposure from sun and diet for every tenth year, against the longer Geraldton Skin Cancer Prevention Survey (the assumed 'gold standard'). We also estimated total vitamin D exposure using the OVAL survey. Design: A randomized crossover design to assess the inter-method reliability of sun exposure (OVAL v. Geraldton survey), using intra-class correlation and estimated total vitamin D exposure from sun and diet. Setting: Calgary, Alberta, Canada. Subjects: Randomly selected women (n 90) aged 40-79 years. Results: The average lifetime sun exposure of 13 913 h (average 411 h/year) from the Geraldton survey was not significantly different from the 13 034 h (average 385 h/year) from the OVAL survey for periods with sufficient UV radiation to stimulate vitamin D production. The intra-class correlation coefficient for average lifetime sun exposure was 0?77 (95 % CI 0?69, 0?86); the annual average was 0?60 (95 % CI 0?47, 0?74). Estimated vitamin D from diet and supplements increased with age. Conclusions: Our OVAL survey reliably estimated adult sun exposure relative to the Geraldton survey, suggesting that assessing sun exposure every tenth year is a reliable and efficient method for estimating sun contributions to lifetime vitamin D exposure.

show abstract

The effect of regular sunscreen use on vitamin D levels in an Australian population. Results of a randomized controlled trial

Cited by 78 publications

References 0 publications

Prevalence and predictors of vitamin D insufficiency in women of reproductive age living in northern latitude

Prevalence and predictors of vitamin D insufficiency in women of reproductive age living in northern latitude

A Dermatologist's Perspective on Vitamin D

Reliability of self-reported sun exposure in Canadian women and estimation of lifetime exposure to vitamin D from sun and diet

Contact Info

Product

Resources

About