Abstract:
OBJECTIVE:To compare the contributions of UVB exposure and diet to total vitamin D among Asians living in Kuala Lumpur (KL) and Aberdeen (AB). DESIGN:Longitudinal study. SETTING:UVB exposure (using polysulfone film badges) and skin colour and dietary vitamin D intake (by web-based questionnaire) were measured at each season in AB and during south-west (SWM) and north-east monsoons (NEM) in KL. SUBJECTS:One hundred and fifteen Asians in KL and eighty-five Asians in AB aged 20-50 years. RESULTS:Median summer UVB exposure of Asians in AB (0·25 SED/d) was higher than UVB exposure for the KL participants (SWM=0·20 SED/d, P=0·02; NEM= 0·14 SED/d, P<0·01). UVB exposure was the major source of vitamin D in KL year-round (60%) but only during summer in AB (59%). Median dietary vitamin D intake was higher in AB (3·50 µg/d (140 IU/d)), year-round, than in KL (SWM=2·05 µg/d (82 IU/d); NEM=1·83 µg/d (73 IU/d), P<0·01). Median total vitamin D (UVB plus diet) was higher in AB only during summer (8·45 µg/d (338 IU/d)) compared with KL (SWM=6·03 µg/d (241 IU/d), P=0·04; NEM=5·35 µg/d (214 IU/d), P<0·01), with a comparable intake across the full year (AB=5·75 µg/d (230 IU/d); KL=6·15 µg/d (246 IU/d), P=0·78). CONCLUSIONS:UVB exposure among Asians in their home country is low. For Asians residing at the northerly latitude of Scotland, acquiring vitamin D needs from UVB exposure alone (except in summer) may be challenging due to low ambient UVB in AB (available only from April to October).
journal_name
Public Health Nutrjournal_title
Public health nutritionauthors
Jamil NA,Yew MH,Noor Hafizah Y,Gray SR,Poh BK,Macdonald HMdoi
10.1017/S1368980018002057subject
Has Abstractpub_date
2018-12-01 00:00:00pages
3118-3124issue
17eissn
1368-9800issn
1475-2727pii
S1368980018002057journal_volume
21pub_type
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pub_type: 临床试验,杂志文章,随机对照试验
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