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Predictors of vitamin D status in subjects that consume a vitamin D supplement
Author(s) -
Levy Mark A,
Dern Adam,
Barker Tyler,
Schneider Erik,
McKin Toni,
Robertson Jeff,
Cuomo John,
Wood Tim,
Dixon Brian M
Publication year - 2013
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.27.1_supplement.1059.2
Subject(s) - vitamin d and neurology , medicine , vitamin , residence , cohort , ethnic group , demography , cohort study , overweight , physiology , body mass index , sociology , anthropology
Recent evidence suggests that circulating vitamin D levels above the current RDA (20ng/ml) may be associated with better health outcomes. However, many factors impact vitamin D status, but their influence on serum levels of 25(OH)D remains unclear. In this retrospective, cross‐sectional study, we sought to identify predictor variables of vitamin D status in free living subjects. Serum levels of 25(OH)D were measured, and the variables gender, ethnicity, height, weight, age, geographic location, duration of daily sun exposure, use of sunscreen and sun‐obscuring clothing, dietary intake, supplement usage, latitude of residence and BMI were used to predict vitamin D status in a summer and winter cohort of subjects. Supplemental vitamin D3 intake was the most significant positive predictor ‐ whereas BMI was the most significant negative predictor ‐ of vitamin D status in both the summer and winter cohort. Additional positive predictors were fortified beverage consumption in the summer, and dairy consumption in the winter. Negative predictors were African American and Asian ethnicity in the summer, while latitude of residence >;36°N and Asian ethnicity were negative predictors in the winter. These results indicate that vitamin D supplementation is the most significant positive predictor of vitamin D status, and point to the practicality of utilizing vitamin D supplements to reduce hypovitaminosis D.