![]() Vitamin D intake and status in Irish elderly women and adolescent girls. McCarthy D, Collins A, O'Brien M, Lamberg-Allardt C, Jakobsen J, Charzewska J et al. Vitamin D status and its adequacy in healthy Danish perimenopausal women: relationships to dietary intake, sun exposure and serum parathyroid hormone. The estimations show that a summer S-25OHD concentration ∼100 nmol/l is needed to achieve a concentration of ∼50 nmol/l the following winter.īrot C, Vestergaard P, Kolthoff N, Gram J, Hermann AP, Sørensen OH. Low vitamin D status among adolescent girls and elderly women during two consecutive winter seasons, improved vitamin D status during the summer and better vitamin D status in women than in girls was found. If summer vitamin D status is only ∼60 nmol/l, vitamin D status the following winter would be ∼28 nmol/l. Winter vitamin D status of 50 nmol/l is achievable when vitamin D status the previous summer was ∼100 nmol/l. Vitamin D intake from supplements ( P<0.0001) and diet ( P=0.002) were determinants for change in vitamin D status from summer to winter. The usual sun habits were determinant ( P=0.002) for change in vitamin D status from winter to summer. Serum 25-hydroxyvitamin D (S-25OHD) concentration and vitamin D intake were measured at each visit. ![]() The participants were examined three times (winter–summer–winter). Subjects/methods:Ī 1-year longitudinal observational study of 54 girls (11–13 years) and 52 women (70–75 years). ![]() To determine seasonal variation in vitamin D status in healthy Caucasian adolescent girls and elderly community-dwelling women living in Denmark, and to quantify the impact of sun exposure and intake on the seasonal changes in vitamin D status. ![]()
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