Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers
Joint Authors
Lundström, Petra
Caidahl, Kenneth
Eriksson, Maria J.
Fritz, Tomas
Krook, Anna
Zierath, Juleen R.
Rickenlund, Anette
Source
Journal of Nutrition and Metabolism
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-03-03
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Background.
Sun exposure is the main driver of vitamin D synthesis.
High latitude, obesity, and type 2 diabetes mellitus (T2DM) are all risk factors for vitamin D deficiency.
However, the seasonal variation in vitamin D concentrations (25[OH]D) in such populations before and after sun exposure during the summer is unknown.
Therefore, we investigated 25[OH]D status before and after two consecutive summers in high latitude and its associations with body fat, sex, and glucose metabolism.
Methods.
158 participants from Sweden (87 women, 71 men; mean age, 60 ± 5 y; body mass index ≥ 25 kg/m2) and 25[OH]D were measured and evaluated in relation to normal or impaired glucose tolerance, body composition, and dietary habits during summer season.
Results.
Eighty-four percent of the participants were categorized with low to deficient 25[OH]D values before summer (55.1 ± 21.7 nmol·L−1), with a significant increase after the summer season (66.3 ± 21.0 nmol·L−1; P<0.001).
However, the values remained below the recommended range (76–250 nmol·L−1) in 66% of the participants.
These findings were verified in a subgroup of the study population during the subsequent summer.
Participants who reported use of vitamin D supplements had higher initial concentrations (64.2 ± 20.1 nmol·L−1) compared to nonusers (53.7 ± 21.7 nmol·L−1; P=0.04).
Further, 25[OH]D values correlated negatively with fat mass (kg) prior to summer only in the female population (r=−0.29, P=0.008).
Conclusions.
In the present study, sun exposure had a beneficial but insufficient effect on 25[OH]D levels, and the same levels were documented in two consecutive summer seasons, confirming that vitamin D supplementation in both summer and winter should be considered in this population.
American Psychological Association (APA)
Lundström, Petra& Caidahl, Kenneth& Eriksson, Maria J.& Fritz, Tomas& Krook, Anna& Zierath, Juleen R.…[et al.]. 2019. Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers. Journal of Nutrition and Metabolism،Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1183553
Modern Language Association (MLA)
Lundström, Petra…[et al.]. Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers. Journal of Nutrition and Metabolism No. 2019 (2019), pp.1-8.
https://search.emarefa.net/detail/BIM-1183553
American Medical Association (AMA)
Lundström, Petra& Caidahl, Kenneth& Eriksson, Maria J.& Fritz, Tomas& Krook, Anna& Zierath, Juleen R.…[et al.]. Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers. Journal of Nutrition and Metabolism. 2019. Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1183553
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1183553