Journal ArticleDOI
Adolescent Girls in Maine Are at Risk for Vitamin D Insufficiency
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Vitamin D intakes need to be increased in winter at northern latitudes because of seasonal fluctuations in serum 25-OHD, and parathyroid hormone levels increased from September to March.Abstract:
The objective was to determine the seasonal fluctuations in serum 25-hydroxyvitamin D (25-OHD) in a group of healthy adolescents living in a northern climate. Twenty-three 9- to 11-year-old girls participated in the study from September 2000 to March 2003. Serum 25-OHD and parathyroid hormone levels were measured each September and March. Dietary intake of vitamin D was assessed each summer and winter. Summer-sun exposure was evaluated using reports of time spent outdoors. The mean decrease in serum 25-OHD from September to March was 28%. Vitamin D insufficiency (at least one serum 25-OHD level <50 nmol/L) was observed in 11 of 23 (48%) subjects. Four of 23 subjects (17%) exhibited vitamin D insufficiency in both September and March. Mean parathyroid hormone levels increased 4 pg/mL (15%) from September to March. Vitamin D intakes need to be increased in winter at northern latitudes.read more
Citations
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Journal ArticleDOI
Vitamin D Deficiency
TL;DR: The role of vitamin D in skeletal and nonskeletal health is considered and strategies for the prevention and treatment ofitamin D deficiency are suggested.
Journal ArticleDOI
Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline
Michael F. Holick,Neil Binkley,Heike A. Bischoff-Ferrari,Catherine M. Gordon,David A. Hanley,Robert P. Heaney,M. Hassan Murad,Connie M. Weaver +7 more
TL;DR: Considering that vitamin D deficiency is very common in all age groups and that few foods contain vitamin D, the Task Force recommended supplementation at suggested daily intake and tolerable upper limit levels, depending on age and clinical circumstances.
Journal Article
Evaluation, treatment, and prevention of vitamin D deficiency: An endocrine society clinical practice guideline (Journal of Clinical Endocrinology and Metabolism (2011) 96, (1911-1930))
Michael F. Holick,Neil Binkley,Heike A. Bischoff-Ferrari,Catherine M. Gordon,David A. Hanley,Robert P. Heaney,M. Hassan Murad,Connie M. Weaver +7 more
TL;DR: The Task Force as discussed by the authors provided guidelines to clinicians for the evaluation, treatment, and prevention of vitamin D deficiency with an emphasis on the care of patients who are at risk for deficiency, based on systematic reviews of evidence and discussions during several conference calls and e-mail communications.
Journal ArticleDOI
Vitamin D deficiency : a worldwide problem with health consequences
Michael F. Holick,Tai C. Chen +1 more
TL;DR: Vitamin D deficiency causes rickets in children and will precipitate and exacerbate osteopenia, osteoporosis, and fractures in adults, and foods that are fortified with vitamin D are often inadequate to satisfy either a child's or an adult's vitamin D requirement.
Journal ArticleDOI
High prevalence of vitamin D inadequacy and implications for health.
TL;DR: The purposes of this article are to examine the prevalence of vitamin D inadequacy and to review the potential implications for skeletal and extraskeletal health.
References
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Book
Vitamin D
TL;DR: In what case do you like reading so much? What about the type of the vitamin d the calcium homeostatic steroid hormone book? The needs to read? Well, everybody has their own reason why should read some books as discussed by the authors.
Journal ArticleDOI
Influence of season and latitude on the cutaneous synthesis of vitamin D3: exposure to winter sunlight in Boston and Edmonton will not promote vitamin D3 synthesis in human skin.
TL;DR: The dramatic influence of changes in solar UVB radiation on cutaneous vitamin D3 synthesis is quantified and the latitudinal increase in the length of the "vitamin D winter" during which dietary supplementation of the vitamin may be advisable is indicated.
Journal ArticleDOI
Human serum 25-hydroxycholecalciferol response to extended oral dosing with cholecalciferol
TL;DR: Current recommended vitamin D inputs are inadequate to maintain serum 25-hydroxycholecalciferol concentration in the absence of substantial cutaneous production of vitamin D.
Journal ArticleDOI
Calcium Absorption Varies within the Reference Range for Serum 25-Hydroxyvitamin D
TL;DR: Calcium absorptive performance at 50 nmol/L was significantly reduced relative to that at a mean 25OHD level of 86 nmol /L, suggesting that individuals with serum 25-hydroxyvitamin D levels at the low end of the current reference ranges may not be getting the full benefit from their calcium intake.
Journal ArticleDOI
Serum 25-hydroxyvitamin D status of adolescents and adults in two seasonal subpopulations from NHANES III.
TL;DR: It is suggested that vitamin D deficiency is unlikely in the two seasonal subpopulations of noninstitutionalized adolescents and adults that can be validly assessed in NHANES III and that insufficiency occurred fairly frequently in younger individuals, especially in the winter/lower latitude subsample.