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Serum 25-Hydroxyvitamin D Response To Daily Oral Supplementation With 800 Iu Cholecalciferol In Premenopausal Women Living In Maine, Monica Nelson
Serum 25-Hydroxyvitamin D Response To Daily Oral Supplementation With 800 Iu Cholecalciferol In Premenopausal Women Living In Maine, Monica Nelson
Electronic Theses and Dissertations
The purpose of this research was to measure the serum 25-hydroxyvitamin D [25(OH)D] response to daily supplementation with 800 IU vitamin D3 during winter in premenopausal women living in Maine, and to examine the effects of body composition and hormonal contraceptive use on baseline serum 25(OH)D levels and the response to supplementation. One hundred twelve women (22.2±3.7 years old) received placebo from March 2005 until September 2005 when they were randomized to receive either placebo or 800 IU vitamin D3 through February 2006. Eighty-six women completed the study. Body composition was measured by dual-energy x-ray absorptiometry. Actual vitamin D3 content …
Validation Of A Sun-Exposure Questionnaire For Adolescent Girls, Jennifer L. Cobb
Validation Of A Sun-Exposure Questionnaire For Adolescent Girls, Jennifer L. Cobb
Electronic Theses and Dissertations
Sunlight is a major contributor to an individual's vitamin D status. Determinants of sun exposure have been used in conjunction with dietary data to study the effect of sunlight on bone health of elderly populations. Sun-exposure questionnaires to assess vitamin D status have not been utilized or tested in populations of children in the United States. This is the first questionnaire, used in accordance with vitamin D research, to be tested against an objective measure of sun exposure and to account for diurnal variation in ultraviolet B (UVB) ray strength. The objective of this study was to develop and validate …