scholarly journals Seasonal variation of 25-Hydroxyvitamin D and indices of carbohydrate and lipid metabolism in postmenopausal women

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11341
Author(s):  
Anna Huta-Osiecka ◽  
Krystian Wochna ◽  
Zbigniew Kasprzak ◽  
Alicja Nowak
Keyword(s):  
Seasonal Variation ◽  
Lipid Metabolism ◽  
Postmenopausal Women ◽  
Fat Mass ◽  
Reference Values ◽  
Seasonal Changes ◽  
Fat Percentage ◽  
Hydroxyvitamin D ◽  
Carbohydrate And Lipid Metabolism ◽  
25 Hydroxyvitamin D

Background Some studies indicate vitamin D’s significant contribution to metabolic processess. Therefore, the purpose of this study was to evaluate the level of carbohydrate and lipid metabolism indices in relation to seasonal changes in 25-hydroxyvitamin D (25(OH)D) concentration in postmenopausal women. Methods Sixteen postmenopausal women meeting health criteria and not using vitamin D supplementation were included in the study. Seasonal variation of somatic features and the serum concentration of 25(OH)D, glucose, insulin, parathormon, sclerostin and lipid profile were determined on two terms (autumn-winter). Results Comparative analysis of the variables between the study terms revealed a marked decrease in the concentration of 25(OH)D (p ≤ 0.0001), insulin (p < 0.05), insulin resistance index (HOMA-IR), (p < 0.05). The significant positive correlations of changes (Δ) between autumn and winter in 25(OH)D with body mass (p < 0.05), and fat mass (p ≤ 0.01), measured in the first study term, in the group of women with normal body mass index (BMI), and negative correlation with fat mass (p < 0.05) in women with a BMI value above the reference values, were found. The relationship analysis showed that in women with normal BMI, the decrease in 25(OH)D concentrations was greater when the body fat percentage was higher, whereas in women with a BMI value above the reference values, the higher the fat percentage, the smaller was the decrease in 25(OH)D concentration. Conclusions Seasonal changes in 25(OH)D concentration did not significantly affect the concentration of carbohydrate and lipid metabolism indices. The magnitude of decline in 25(OH)D levels depends on the fat mass. We suppose that environmental or lifestyle-related factors, e.g., nutritional behaviours, may have had more influence on metabolic indices than changes in 25(OH)D.

scholarly journals Hypovitaminosis D in an Italian population of healthy subjects and hospitalized patients

1999 ◽  
Vol 81 (2) ◽  
pp. 133-137 ◽  
Author(s):  
Elisabetta Romagnoli ◽  
Patrizia Caravella ◽  
Liliana Scarnecchia ◽  
Paolo Martinez ◽  
Salvatore Minisola
Keyword(s):  
Vitamin D ◽  
Seasonal Variation ◽  
Postmenopausal Women ◽  
Healthy Subjects ◽  
Hypovitaminosis D ◽  
Hospitalized Patients ◽  
Italian Population ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D ◽  
Group D

The present study aimed to investigate the prevalence and seasonal variation of hypovitaminosis D (defined as serum 25-hydroxyvitamin D level below 30 nmol/l) among healthy subjects and hospitalized patients living in central Italy. We studied 297 subjects, 131 in February 1997 and 166 in July 1997, subdivided into four groups: (a) young healthy blood donors; (b) healthy postmenopausal women; (c) inpatients with various medical diseases and (d) inpatients engaged in long-term rehabilitation programmes because of various neurological disorders. In all subjects and patients serum levels of 25-hydroxyvitamin D were measured by radioimmunoassay. We found a significant seasonal variation (P< 0·0001) of serum 25-hydroxyvitamin D levels, mean values being higher in summer in all groups, except in patients with a longer hospitalization time (group (d)). In each group, a significantly higher prevalence of hypovitaminosis D was found in winter compared with summer time (P< 0·001), being unexpectedly high in postmenopausal women (winter 32 % and summer 4·5 %); furthermore, in both seasons, inpatients were characterized by the highest incidences of hypovitaminosis, particularly those in group (d) (winter 82·3 % and summer 57·8 %). The results of the present study emphasize the importance of 25-hydroxyvitamin D measurement, and the need to increase vitamin D intake in Italy; foodstuff fortification and supplement use must be considered in order to prevent negative effects of vitamin D deficiency on skeletal integrity.

scholarly journals The effects of seasonal variation of 25-hydroxyvitamin D and fat mass on a diagnosis of vitamin D sufficiency

2007 ◽  
Vol 86 (4) ◽  
pp. 959-964 ◽  
Author(s):  
Mark J Bolland ◽  
Andrew B Grey ◽  
Ruth W Ames ◽  
Barbara H Mason ◽  
Anne M Horne ◽  
...  
Keyword(s):  
Vitamin D ◽  
Seasonal Variation ◽  
Fat Mass ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

scholarly journals Serum 25-hydroxyvitamin D is related to indicators of overall physical fitness in healthy postmenopausal women

2009 ◽  
Vol 16 (6) ◽  
pp. 1093-1101 ◽  
Author(s):  
Jeanne W. Stewart ◽  
D. Lee Alekel ◽  
Laura M. Ritland ◽  
Marta Van Loan ◽  
Erik Gertz ◽  
...  
Keyword(s):  
Physical Fitness ◽  
Postmenopausal Women ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

scholarly journals Vitamin D Status and Seasonal Variation among Danish Children and Adults: A Descriptive Study

Nutrients ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1801 ◽  
Author(s):  
Louise Hansen ◽  
Anne Tjønneland ◽  
Brian Køster ◽  
Christine Brot ◽  
Rikke Andersen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Seasonal Variation ◽  
Vitamin D Status ◽  
Hydroxyvitamin D ◽  
Supplement Use ◽  
Wide Range ◽  
Adults And Children ◽  
25 Hydroxyvitamin D ◽  
Vitamin D Supplement ◽  
Very High

The aim of the present study was to describe vitamin D status and seasonal variation in the general Danish population. In this study, 3092 persons aged 2 to 69 years (2565 adults, 527 children) had blood drawn twice (spring and autumn) between 2012 and 2014. A sub-sample of participants had blood samples taken monthly over a year. Serum 25-hydroxyvitamin D (25(OH)D) concentrations were measured by liquid chromatography mass spectrometry, and information on supplement use was assessed from questionnaires. Seasonal variations in 25(OH)D concentrations were evaluated graphically and descriptively, and status according to age, sex, and supplement use was described. It was found that 86% of both adults and children were vitamin D-sufficient in either spring and or/autumn; however, many had a spring concentration below 50 nmol/L. A wide range of 25(OH)D concentrations were found in spring and autumn, with very low and very high values in both seasons. Among adults, women in general had higher median 25(OH)D concentrations than men. Furthermore, vitamin D supplement use was substantial and affected the median concentrations markedly, more so during spring than autumn. Seasonal variation was thus found to be substantial, and bi-seasonal measurements are vital in order to capture the sizable fluctuations in vitamin D status in this Nordic population.

scholarly journals Plasma 25-Hydroxyvitamin D Concentrations and Periodontal Disease in Postmenopausal Women

2013 ◽  
Vol 84 (9) ◽  
pp. 1243-1256 ◽  
Author(s):  
Amy E. Millen ◽  
Kathleen M. Hovey ◽  
Michael J. LaMonte ◽  
Mya Swanson ◽  
Christopher A. Andrews ◽  
...  
Keyword(s):  
Periodontal Disease ◽  
Postmenopausal Women ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

scholarly journals Skin Color Change in Caucasian Postmenopausal Women Predicts Summer-Winter Change in 25-Hydroxyvitamin D: Findings from the ANSAViD Cohort Study

2011 ◽  
Vol 96 (6) ◽  
pp. 1677-1686 ◽  
Author(s):  
Helen M. Macdonald ◽  
Alexandra Mavroeidi ◽  
Lorna A. Aucott ◽  
Brian L. Diffey ◽  
William D. Fraser ◽  
...  
Keyword(s):  
Cohort Study ◽  
Postmenopausal Women ◽  
Skin Color ◽  
Color Change ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

Seasonal variations of serum 1,25-dihydroxyvitamin D3 and alkaline phosphatase in relation to the antler formation in the fallow deer (Dama dama L.)

1984 ◽  
Vol 107 (1) ◽  
pp. 141-144 ◽  
Author(s):  
B. Eiben ◽  
St. Scharla ◽  
K. Fischer ◽  
H. Schmidt-Gayk
Keyword(s):  
Alkaline Phosphatase ◽  
Seasonal Variation ◽  
Serum Alkaline Phosphatase ◽  
Serum Levels ◽  
Fallow Deer ◽  
Dama Dama ◽  
Dihydroxyvitamin D3 ◽  
Hydroxyvitamin D ◽  
1,25 Dihydroxyvitamin D3 ◽  
25 Hydroxyvitamin D

Abstract. Serum 1,25-dihydroxyvitamin D3 and serum alkaline phosphatase increased several fold during the antler formation period in July. Both maxima were observed in the second half of the antler formation period, where the mineralization of the antler takes place. In contrast serum levels of calcium and 25-hydroxyvitamin D3 showed no alternation or seasonal variation.

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