Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers
(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)
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https://lup.lub.lu.se/record/52ca647b-c0f6-4946-be16-c25d7378bd57
- author
- Lundström, Petra LU ; Caidahl, Kenneth ; Eriksson, Maria J. ; Fritz, Tomas ; Krook, Anna ; Zierath, Juleen R. and Rickenlund, Anette
- publishing date
- 2019
- 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}}, }