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Lifestyle factors including less cutaneous sun exposure contribute to starkly lower vitamin D levels in U.K. South Asians compared with the white population.
Br J Dermatol. 2013 Dec; 169(6):1272-8.BJ

Abstract

BACKGROUND

Long-standing concerns over the vitamin D status of South Asian adults in the U.K. require studies using statistically valid sample sizes to measure annual variation and contributory lifestyle factors.

OBJECTIVES

To measure annual variation in the vitamin D status of U.K. South Asians, to determine the associated lifestyle influences, and to compare these with a similar study of white adults.

METHODS

A single-centre, prospective cohort study measuring circulating 25-hydroxyvitamin D [25(OH)D], sunlight exposure levels and lifestyle factors for 1 year in 125 ambulant South Asian adults with sun-reactive skin type V, aged 20-60 years, in Greater Manchester, U.K. (53·5°N).

RESULTS

The 25(OH)D levels of South Asians were alarmingly low. In summer, their median 25(OH)D level was 9·0 ng mL(-1) , [interquartile range (IQR) 6·7-13·1], falling to 5·8 ng mL(-1) (IQR 4·0-8·1) in winter. This compared with values in the white population of 26·2 ng mL(-1) (IQR 19·9-31·5) in summer and 18·9 ng mL(-1) IQR (11·6-23·7) in winter. Median daily dietary vitamin D was lower in South Asians (1·32 μg vs. 3·26 μg for white subjects) and was compounded by low supplement use. Despite similar times spent outdoors, ultraviolet (UV) dosimeters recorded lower personal UV exposure among South Asians, indicating sun avoidance when outside, while sun exposure diaries recorded lower amounts of skin surface exposure.

CONCLUSIONS

The majority of South Asians never reached sufficiency in vitamin D status. Lifestyle differences, with lower oral intake, sun exposure and rates of cutaneous production due to darker skin, indicate that standard advice on obtaining sufficient vitamin D needs modification for the South Asian community in the U.K.

Authors+Show Affiliations

School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, U.K.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23855783

Citation

Kift, R, et al. "Lifestyle Factors Including Less Cutaneous Sun Exposure Contribute to Starkly Lower Vitamin D Levels in U.K. South Asians Compared With the White Population." The British Journal of Dermatology, vol. 169, no. 6, 2013, pp. 1272-8.
Kift R, Berry JL, Vail A, et al. Lifestyle factors including less cutaneous sun exposure contribute to starkly lower vitamin D levels in U.K. South Asians compared with the white population. Br J Dermatol. 2013;169(6):1272-8.
Kift, R., Berry, J. L., Vail, A., Durkin, M. T., Rhodes, L. E., & Webb, A. R. (2013). Lifestyle factors including less cutaneous sun exposure contribute to starkly lower vitamin D levels in U.K. South Asians compared with the white population. The British Journal of Dermatology, 169(6), 1272-8. https://doi.org/10.1111/bjd.12518
Kift R, et al. Lifestyle Factors Including Less Cutaneous Sun Exposure Contribute to Starkly Lower Vitamin D Levels in U.K. South Asians Compared With the White Population. Br J Dermatol. 2013;169(6):1272-8. PubMed PMID: 23855783.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Lifestyle factors including less cutaneous sun exposure contribute to starkly lower vitamin D levels in U.K. South Asians compared with the white population. AU - Kift,R, AU - Berry,J L, AU - Vail,A, AU - Durkin,M T, AU - Rhodes,L E, AU - Webb,A R, PY - 2013/07/03/accepted PY - 2013/7/17/entrez PY - 2013/7/17/pubmed PY - 2014/8/29/medline SP - 1272 EP - 8 JF - The British journal of dermatology JO - Br J Dermatol VL - 169 IS - 6 N2 - BACKGROUND: Long-standing concerns over the vitamin D status of South Asian adults in the U.K. require studies using statistically valid sample sizes to measure annual variation and contributory lifestyle factors. OBJECTIVES: To measure annual variation in the vitamin D status of U.K. South Asians, to determine the associated lifestyle influences, and to compare these with a similar study of white adults. METHODS: A single-centre, prospective cohort study measuring circulating 25-hydroxyvitamin D [25(OH)D], sunlight exposure levels and lifestyle factors for 1 year in 125 ambulant South Asian adults with sun-reactive skin type V, aged 20-60 years, in Greater Manchester, U.K. (53·5°N). RESULTS: The 25(OH)D levels of South Asians were alarmingly low. In summer, their median 25(OH)D level was 9·0 ng mL(-1) , [interquartile range (IQR) 6·7-13·1], falling to 5·8 ng mL(-1) (IQR 4·0-8·1) in winter. This compared with values in the white population of 26·2 ng mL(-1) (IQR 19·9-31·5) in summer and 18·9 ng mL(-1) IQR (11·6-23·7) in winter. Median daily dietary vitamin D was lower in South Asians (1·32 μg vs. 3·26 μg for white subjects) and was compounded by low supplement use. Despite similar times spent outdoors, ultraviolet (UV) dosimeters recorded lower personal UV exposure among South Asians, indicating sun avoidance when outside, while sun exposure diaries recorded lower amounts of skin surface exposure. CONCLUSIONS: The majority of South Asians never reached sufficiency in vitamin D status. Lifestyle differences, with lower oral intake, sun exposure and rates of cutaneous production due to darker skin, indicate that standard advice on obtaining sufficient vitamin D needs modification for the South Asian community in the U.K. SN - 1365-2133 UR - https://www.unboundmedicine.com/medline/citation/23855783/Lifestyle_factors_including_less_cutaneous_sun_exposure_contribute_to_starkly_lower_vitamin_D_levels_in_U_K__South_Asians_compared_with_the_white_population_ L2 - https://doi.org/10.1111/bjd.12518 DB - PRIME DP - Unbound Medicine ER -