Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers

Lundström, Petra LU ; Caidahl, Kenneth ; Eriksson, Maria J. ; Fritz, Tomas ; Krook, Anna ; Zierath, Juleen R. and Rickenlund, Anette (2019) In Journal of Nutrition and Metabolism p.1-8
Abstract
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.... (More)
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; ). 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; ). Further, 25[OH]D values correlated negatively with fat mass (kg) prior to summer only in the female population (). 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. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
Journal of Nutrition and Metabolism
article number
1840374
pages
1 - 8
publisher
Hindawi Limited
external identifiers
  • scopus:85063268938
ISSN
2090-0724
DOI
10.1155/2019/1840374
language
English
LU publication?
no
id
52ca647b-c0f6-4946-be16-c25d7378bd57
date added to LUP
2022-04-26 17:17:33
date last changed
2024-02-19 17:02:35
@article{52ca647b-c0f6-4946-be16-c25d7378bd57,
  abstract     = {{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; ). 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; ). Further, 25[OH]D values correlated negatively with fat mass (kg) prior to summer only in the female population (). 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.}},
  author       = {{Lundström, Petra and Caidahl, Kenneth and Eriksson, Maria J. and Fritz, Tomas and Krook, Anna and Zierath, Juleen R. and Rickenlund, Anette}},
  issn         = {{2090-0724}},
  language     = {{eng}},
  pages        = {{1--8}},
  publisher    = {{Hindawi Limited}},
  series       = {{Journal of Nutrition and Metabolism}},
  title        = {{Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers}},
  url          = {{http://dx.doi.org/10.1155/2019/1840374}},
  doi          = {{10.1155/2019/1840374}},
  year         = {{2019}},
}