scholarly journals Threshold Effects of Vitamin D Status on Bone Health in Chinese Adolescents With Low Calcium Intake

2015 ◽  
Vol 100 (12) ◽  
pp. 4481-4489 ◽  
Author(s):  
Feitong Wu ◽  
Laura L. Laslett ◽  
Qian Zhang
Keyword(s):  
Vitamin D ◽  
Bone Health ◽  
Calcium Intake ◽  
Chinese Adolescents ◽  
Threshold Effects ◽  
Vitamin D Status ◽  
Low Calcium

scholarly journals Dietary Calcium Intake, Vitamin D Status, and Bone Health in Postmenopausal Women in Rural Pakistan

2011 ◽  
Vol 29 (5) ◽  
Author(s):  
Nicola M Lowe ◽  
Basma Ellahi ◽  
Qudsia Bano ◽  
Sonia Ali Bangash ◽  
Soma R Mitra ◽  
...  
Keyword(s):  
Vitamin D ◽  
Postmenopausal Women ◽  
Bone Health ◽  
Calcium Intake ◽  
Dietary Calcium ◽  
Dietary Calcium Intake ◽  
Vitamin D Status ◽  
Rural Pakistan

Low calcium intake and inadequate vitamin D status in postmenopausal osteoporotic women

2013 ◽  
Vol 136 ◽  
pp. 175-177 ◽  
Author(s):  
José Manuel Quesada-Gómez ◽  
Manuel Diaz-Curiel ◽  
Manuel Sosa-Henriquez ◽  
Jorge Malouf-Sierra ◽  
Xavier Nogues-Solan ◽  
...  
Keyword(s):  
Vitamin D ◽  
Calcium Intake ◽  
Vitamin D Status ◽  
Low Calcium

scholarly journals Calcium Absorption Measured by Stable Calcium Isotopes (42Ca & 44Ca) among Northern Chinese Adolescents with Low Vitamin D Status

2002 ◽  
Vol 10 (1) ◽  
pp. 61-66 ◽  
Author(s):  
Warren T K Lee ◽  
Jack C.Y. Cheng ◽  
Ji Jiang ◽  
Pei Hu ◽  
Xiaopeng Hu ◽  
...  
Keyword(s):  
Vitamin D ◽  
Calcium Intake ◽  
Calcium Absorption ◽  
Bone Mineralization ◽  
Northern China ◽  
Urinary Calcium ◽  
Chinese Adolescents ◽  
Plasma Vitamin ◽  
Calcium Excretion ◽  
Vitamin D Status

An adequate calcium intake and vitamin-D status is important for bone mineralization in adolescents. In Northern China, calcium intake and plasma vitamin-D level of adolescents is low due to low consumption of dairy foods and inadequate sunshine exposure. True fractional calcium absorption (TFCA) in Chinese adolescents has never been performed. This study aims to evaluate nutritional adaptation namely, TFCA and urinary calcium excretion among Chinese adolescents in northern China.

Vitamin D status and bone health in survivors of childhood lymphoblastic leukemia

2013 ◽  
Author(s):  
M Schundeln Michael ◽  
K Hauffa Pia ◽  
C Goretzki Sara ◽  
Lahner Harald ◽  
Marschke Laura ◽  
...  
Keyword(s):  
Vitamin D ◽  
Bone Health ◽  
Lymphoblastic Leukemia ◽  
Vitamin D Status

scholarly journals Interactions between Vitamin D Status, Calcium Intake and Parathyroid Hormone Concentrations in Healthy White-Skinned Pregnant Women at Northern Latitude

Nutrients ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 916 ◽  
Author(s):  
Andrea Hemmingway ◽  
Karen O’Callaghan ◽  
Áine Hennessy ◽  
George Hull ◽  
Kevin Cashman ◽  
...  
Keyword(s):  
Vitamin D ◽  
Parathyroid Hormone ◽  
Pregnant Women ◽  
Calcium Intake ◽  
Geometric Mean ◽  
Vitamin D Status ◽  
Metabolic System ◽  
Cross Sectional ◽  
The Mean ◽  
In Pregnancy

Adverse effects of low vitamin D status and calcium intakes in pregnancy may be mediated through functional effects on the calcium metabolic system. Little explored in pregnancy, we aimed to examine the relative importance of serum 25-hydroxyvitamin D (25(OH)D) and calcium intake on parathyroid hormone (PTH) concentrations in healthy white-skinned pregnant women. This cross-sectional analysis included 142 participants (14 ± 2 weeks’ gestation) at baseline of a vitamin D intervention trial at 51.9 °N. Serum 25(OH)D, PTH, and albumin-corrected calcium were quantified biochemically. Total vitamin D and calcium intakes (diet and supplements) were estimated using a validated food frequency questionnaire. The mean ± SD vitamin D intake was 10.7 ± 5.2 μg/day. With a mean ± SD serum 25(OH)D of 54.9 ± 22.6 nmol/L, 44% of women were <50 nmol/L and 13% <30 nmol/L. Calcium intakes (mean ± SD) were 1182 ± 488 mg/day and 23% of participants consumed <800 mg/day. The mean ± SD serum albumin-adjusted calcium was 2.2 ± 0.1 mmol/L and geometric mean (95% CI) PTH was 9.2 (8.4, 10.2) pg/mL. PTH was inversely correlated with serum 25(OH)D (r = −0.311, p < 0.001), but not with calcium intake or serum calcium (r = −0.087 and 0.057, respectively, both p > 0.05). Analysis of variance showed that while serum 25(OH)D (dichotomised at 50 nmol/L) had a significant effect on PTH (p = 0.025), calcium intake (<800, 800–1000, ≥1000 mg/day) had no effect (p = 0.822). There was no 25(OH)D-calcium intake interaction effect on PTH (p = 0.941). In this group of white-skinned women with largely sufficient calcium intakes, serum 25(OH)D was important for maintaining normal PTH concentration.

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