scholarly journals Genetic, sociodemographic and lifestyle factors associated with serum 25-hydroxyvitamin D concentrations in Brazilian adults: the Pró-Saúde Study

2022 ◽  
Vol 38 (1) ◽  
Author(s):  
Flávia Fioruci Bezerra ◽  
Paula Normando ◽  
Ana Carolina P. Fonseca ◽  
Verônica Zembrzuski ◽  
Mario Campos-Junior ◽  
...  
Keyword(s):  
Physical Activity ◽  
Vitamin D ◽  
Visceral Fat ◽  
Sun Exposure ◽  
Lifestyle Factors ◽  
Skin Type ◽  
Factors Associated ◽  
Hydroxyvitamin D ◽  
Modifiable Factors ◽  
25 Hydroxyvitamin D

This study aims to investigate factors associated with serum 25-hydroxyvitamin D [25(OH)D] concentration in Brazilian adults considering sociodemographic and lifestyle factors, as well as vitamin D-related single nucleotide polymorphisms (SNPs). This is a cross-sectional study (n = 491; 34-79y; 251 women), nested within a prospective cohort (Pró-Saúde Study). Associations between serum 25(OH)D and sociodemographic characteristics, diet, use of supplement, physical activity, season of blood collection, body fat, skin type, sun exposure index, and SNPs CYP2R1-rs10741657 and GC-rs2282679 were explored by multiple linear regression. The prevalence of serum 25(OH)D < 50nmol/L was 55%. Serum 25(OH)D was lower among women (β = -4.38; 95%CI: -8.02; -0.74), those with higher visceral fat (β = -4.02; 95%CI: -5.92; -2.12), and those with AC and CC genotypes for GC-rs2282679 (β = -6.84; 95%CI: -10.09; -3.59; β = -10.63; 95%CI: -17.52; -3.74, respectively). Factors directly associated with serum 25(OH)D included summer (β = 20.14; 95%CI: 14.38; 25.90), intermediate skin type (β = 6.16; 95%CI: 2.52; 9.80), higher sun exposure (β = 0.49; 95%CI: 0.22; 0.75), vitamin D intake (β = 0.48; 95%CI: 0.03; 0.93), and physical activity (β = 4.65; 95%CI: 1.54; 7.76). Besides physical activity, diet, and sun exposure, non-modifiable factors, such as GC genotypes must be considered when evaluating vitamin D insufficiency in mixed-race populations. Moreover, high visceral fat in association with poorer vitamin D status deserve attention given that both conditions are unfavorably related with chronic and acute health outcomes.

scholarly journals Sun behaviour and physical activity associated with autumn vitamin D status in 4–8-year-old Danish children

2018 ◽  
Vol 21 (17) ◽  
pp. 3158-3167 ◽  
Author(s):  
Charlotte Mortensen ◽  
Christian Mølgaard ◽  
Hanne Hauger ◽  
Michael Kristensen ◽  
Camilla T Damsgaard
Keyword(s):  
Physical Activity ◽  
Vitamin D ◽  
School Children ◽  
Sun Exposure ◽  
Vitamin D Supplementation ◽  
Fat Free Mass ◽  
Protection Factor ◽  
Hydroxyvitamin D ◽  
Vitamin D Intake ◽  
25 Hydroxyvitamin D

AbstractObjectiveTo explore determinants of serum 25-hydroxyvitamin D (s-25(OH)D) during autumn in young, Caucasian children not consuming vitamin D-fortified foods or supplements, and explore differences in sun behaviours between pre-school and school children.DesignIn September–October, s-25(OH)D was measured by LC–MS/MS; physical activity, sun behaviours and vitamin D intake were assessed with questionnaires.SettingBaseline data from the ODIN Junior trial at 55°N.SubjectsChildren aged 4–8 years (n130), of whom 96% gave blood samples.ResultsMean s-25(OH)D was 56·8 (sd12·5) nmol/l and positively associated with fat-free mass index (P=0·014). Children being active 6–7 h/week had 5·6 (95% CI 1·1, 10·0) nmol/l higher s-25(OH)D than less active children (P=0·014). Children seeking shade sometimes or rarely/never had 7·0 (95% CI 1·2, 12·9;P=0·018) and 7·2 (95% CI 0·8, 13·6;P=0·028) nmol/l higher s-25(OH)D, respectively, than children always/often seeking shade. Pre-school children had more sun-safe behaviour than school children in terms of use of a hat, sunscreen and sunscreen sun protection factor (P<0·05). In school but not pre-school children, using a hat rarely/never was associated with 12·1 (95% CI 2·5, 21·7;P=0·014) nmol/l higher s-25(OH)Dv. always/often (Pinteraction=0·019). Vitamin D intake was not associated with s-25(OH)D (P=0·241).ConclusionsPhysical activity and sun behaviours are associated with s-25(OH)D in young children. Identifying factors influencing autumn s-25(OH)D is relevant to optimize levels before sun exposure diminishes. Strategies to reduce risk of inadequacy should consider risk of skin cancer and sunburn, and could include fortification and/or vitamin D supplementation.

scholarly journals Predictors of Serum 25-Hydroxyvitamin D Concentrations among a Sample of Egyptian Schoolchildren

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Mones M. Abu Shady ◽  
Mai M. Youssef ◽  
Ebtissam M. Salah El-Din ◽  
Ola M. Abdel Samie ◽  
Hala S. Megahed ◽  
...  
Keyword(s):  
Physical Activity ◽  
Vitamin D ◽  
Parathyroid Hormone ◽  
Vitamin D Deficiency ◽  
Maternal Education ◽  
Sun Exposure ◽  
Education Level ◽  
Milk Intake ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

Objective. To assess the level of 25-hydroxyvitamin D status among a sample of Egyptian schoolchildren and to evaluate predictors of deficiency and insufficiency.Subjects and Methods. A cross-sectional study comprising 200 prepubescent schoolchildren aged from 9 to 11 years was performed. A questionnaire including frequency of midday sun exposure, milk intake, physical activity, and level of maternal education was taken. Body mass index (BMI) was calculated; serum 25-hydroxyvitamin D [25(OH)D], serum calcium, phosphorus, and parathyroid hormone were measured.Results. Vitamin D deficiency [serum 25(OH)D < 20 ng/mL] was detected in 11.5% of subjects while its insufficiency (serum 25(OH)D is between 20 and 29.9 ng/mL) was detected in 15%. Results revealed that obesity, low physical activity, low sun exposure, and low maternal education level are significant predictors of insufficiency, though female gender, low maternal education level, and low milk intake are significant predictors of deficiency. Lower serum phosphorus and higher serum parathyroid hormone were significantly associated with both deficiency and insufficiency (p<0.05).Conclusion. Vitamin D deficiency and insufficiency are common among schoolchildren in Egypt. Food fortification, vitamin D supplementation, and increasing maternal awareness about the importance of physical activity and exposure of their children to ultraviolet light may help to overcome this problem.

scholarly journals Comparison of Vitamin D and 25-Hydroxyvitamin D Concentrations in Human Breast Milk between 1989 and 2016–2017

Nutrients ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 573
Author(s):  
Naoko Tsugawa ◽  
Mayu Nishino ◽  
Akiko Kuwabara ◽  
Honami Ogasawara ◽  
Maya Kamao ◽  
...  
Keyword(s):  
Vitamin D ◽  
Breast Milk ◽  
Sun Exposure ◽  
Stepwise Multiple Regression ◽  
Human Breast Milk ◽  
Vitamin D Status ◽  
Human Breast ◽  
Hydroxyvitamin D ◽  
Lactating Mothers ◽  
25 Hydroxyvitamin D

Background: Breast milk is considered the optimal source of nutrition during infancy. Although the vitamin D concentration in human breast milk is generally considered poor for infants, vitamin D in breast milk is an important source for exclusively breastfed infants. Increases in vitamin D insufficiency and deficiency in lactating mothers may reduce vitamin D concentrations in breast milk. This study aimed to compare vitamin D and 25-hydroxyvitamin D (25OHD) concentrations in breast milk collected in 1989 and 2016–2017 and simultaneously analyze them with liquid chromatography-tandem mass spectrometry (LC-MS/MS); the association between the lifestyle of recent lactating mothers (2016–2017) and vitamin D status in human breast milk was also evaluated. Method: Lactating mothers were recruited from three regions of Japan in 1989 (n = 72) and 2016–2017 (n = 90), and milk from 3–4 months was collected in summer and winter. The samples were strictly sealed and stored at −80℃ until measurement. Breast milk vitamin D and 25OHD concentrations were analyzed by LC-MS/MS. Vitamin D intake, sun exposure, and sunscreen use of the lactating mothers in 2016–2017 were assessed. Results: Both vitamin D and 25OHD concentrations in breast milk were higher in the summer regardless of the survey year. Significantly lower vitamin D and 25OHD concentrations were observed in 2016–2017 compared with 1989 in summer, but no survey year difference was observed in winter. The stepwise multiple regression analyses identified season, daily outdoor activity, and suntan in the last 12 months as independent factors associated with vitamin D3 concentrations. Conclusion: The results suggest that low vitamin D status in recent lactating mothers may have decreased vitamin D and 25OHD concentrations in breast milk compared with the 1980s. These results are helpful for developing public health strategies to improve vitamin D status in lactating mothers and infants.

Vitamin D status of children in Kerala, southern India

2019 ◽  
Vol 23 (7) ◽  
pp. 1179-1183 ◽  
Author(s):  
Madhava Vijayakumar ◽  
Vijayalakshmi Bhatia ◽  
Biju George
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Sun Exposure ◽  
Southern India ◽  
Fish Diet ◽  
Vitamin D Status ◽  
Cross Sectional ◽  
Dietary Recall ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

AbstractObjectiveTo study plasma 25-hydroxyvitamin D (25(OH)D) status of children in Kerala, southern India, and its relationship with sociodemographic variables.DesignCross-sectional observational study.SettingTertiary government hospital.ParticipantsChildren (n 296) with trivial acute illness were enrolled. Sun exposure and Ca and vitamin D intakes (7 d dietary recall) were documented. Serum Ca, P, alkaline phosphatase, plasma 25(OH)D and parathyroid hormone (PTH) were measured.ResultsPrevalence of vitamin D deficiency (plasma 25(OH)D <30 nmol/l) was 11·1% (median, interquartile range (IQR): 52·6, 38·4–65·6 nmol/l). Children who ate fish daily had significantly higher plasma 25(OH)D than those who did not (median, IQR: 52·5, 40·8–68·9 v. 49·1, 36·2–60·7 nmol/l; P = 0·02). Those investigated in the months of March–May showed highest 25(OH)D v. those enrolled during other times (median, IQR: 58·7, 45·6–81·4 v. 45·5, 35·6–57·4 nmol/l; P <0·001). Plasma 25(OH)D correlated positively with serum P (r = 0·24, P <0·001) and Ca intake (r = 0·16, P 0·03), negatively with age (r = −0·13, P 0·03) and PTH (r = −0·22, P <0·001.). On linear regression, summer season (March–May), lower age, daily fish intake and higher Ca intake were independently associated with plasma 25(OH)D.ConclusionsPrevalence of vitamin D deficiency is low in Kerala. The natural fish diet of coastal Kerala and the latitude may be protective. Public health policy in India should take account of this geographical diversity.

25-Hydroxyvitamin D levels in serum at the onset of multiple sclerosis

2005 ◽  
Vol 11 (3) ◽  
pp. 266-271 ◽  
Author(s):  
M Soilu-Hänninen ◽  
L Airas ◽  
I Mononen ◽  
A Heikkilä ◽  
M Viljanen ◽  
...  
Keyword(s):  
Vitamin D ◽  
Bone Metabolism ◽  
Sun Exposure ◽  
Serum Levels ◽  
Vitamin D Supplementation ◽  
Hydroxyvitamin D ◽  
Normal Bone ◽  
Vitamin D Levels ◽  
25 Hydroxyvitamin D ◽  
Lower Vitamin

Past sun exposure and vitamin D supplementation have been associated with a reduction in the risk of MS. We measured the serum concentration of 25-hydroxyvitamin D (25[OH]D) at the time of MS diagnosis in 40 MS patients and 40 controls. We found no difference in the serum levels of 25(OH)D between MS patients and controls when all samples or samples obtained during winter months were compared, but MS patients had significantly lower serum 25(OH)D concentrations in June to September than the controls. The vitamin D stores were adequate for bone metabolism (> 37 nmol/L) in 70% of MS patients throughout the year and within the hypovitaminosis level (< 37 nmol/L) in 30% of MS patients at some time of the year. During MS-relapses, 25(OH)D levels were lower than in remission, but mostly within the reference range observed in relation with normal bone metabolism. We conclude that the vitamin D stores in most MS patients are adequate for their normal bone metabolism. However, lower vitamin D levels during MS relapses than in remission suggest that vitamin D could be involved in the regulation of the clinical disease activity of MS. The optimal serum levels of vitamin D for the regulation of immune responses remain to be determined.

scholarly journals Associations of Sun Exposure with 25-Hydroxyvitamin D and Parathyroid Hormone Levels in a Cohort of Hypertensive Patients: The Graz Endocrine Causes of Hypertension (GECOH) Study

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Stefan Pilz ◽  
Katharina Kienreich ◽  
Daniel Stückler ◽  
Andreas Meinitzer ◽  
Andreas Tomaschitz
Keyword(s):  
Vitamin D ◽  
Parathyroid Hormone ◽  
Scalp Hair ◽  
Sun Exposure ◽  
Hypertensive Patients ◽  
Hydroxyvitamin D ◽  
Outdoor Sports ◽  
25 Hydroxyvitamin D ◽  
Relationship Of ◽  
The Relationship

Sunlight-induced vitamin D, synthesis in the skin is the major source of vitamin D, but data on the relationship of sun-related behaviour with vitamin D and parathyroid hormone (PTH) levels are relatively sparse. We evaluated whether habitual sun exposure is associated with 25-hydroxyvitamin D (25[OH]D) and PTH levels and whether there exist seasonal variations. We examined 111 hypertensive patients in Austria (latitude 47° N). Frequent sunbathing at home and outdoor sports were associated with higher 25(OH)D levels (P<0.05for both). Red or blond scalp hair as a child, memory of sunburns, preferring sunbathing, frequent stays on the beach or in open-air pools, and solarium use were associated with lower PTH levels (P<0.05for all). Multiple linear regression analyses including age, sex, and body mass index showed that sun exposure score was significantly associated with 25(OH)D (betacoefficient=0.27;P=0.004) and by trend with PTH (betacoefficient=−0.16;P=0.09). These associations were more prominent in summer in which 25(OH)D levels were significantly higher compared to winter. Translation of these findings into recommendations for the prevention and treatment of vitamin D deficiency remains a challenge for the future.

scholarly journals Vitamin D deficiency prevalence and risk factors among pregnant Chinese women

2015 ◽  
Vol 20 (10) ◽  
pp. 1746-1754 ◽  
Author(s):  
Chunfeng Yun ◽  
Jing Chen ◽  
Yuna He ◽  
Deqian Mao ◽  
Rui Wang ◽  
...  
Keyword(s):  
Risk Factors ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Chinese Women ◽  
Sun Exposure ◽  
Regression Analyses ◽  
Hydroxyvitamin D ◽  
Supplement Use ◽  
25 Hydroxyvitamin D ◽  
Vitamin D Supplement

AbstractObjectiveTo evaluate vitamin D deficiency prevalence and risk factors among pregnant Chinese women.DesignA descriptive cross-sectional analysis.SettingChina National Nutrition and Health Survey (CNNHS) 2010–2013.SubjectsA total of 1985 healthy pregnant women participated. Possible predictors of vitamin D deficiency were evaluated via multiple logistic regression analyses.ResultsThe median serum 25-hydroxyvitamin D level was 15·5 (interquartile range 11·9–20·0, range 3·0–51·5) ng/ml, with 74·9 (95 % CI 73·0, 76·7) % of participants being vitamin D deficient (25-hydroxyvitamin D <20 ng/ml). According to the multivariate logistic regression analyses, vitamin D deficiency was positively correlated with Hui ethnicity (P=0·016), lack of vitamin D supplement use (P=0·021) and low ambient UVB level (P<0·001). In the autumn months, vitamin D deficiency was related to Hui ethnicity (P=0·012) and low ambient UVB level (P<0·001). In the winter months, vitamin D deficiency was correlated with younger age (P=0·050), later gestational age (P=0·035), higher pre-pregnancy BMI (P=0·019), low ambient UVB level (P<0·001) and lack of vitamin D supplement use (P=0·007).ConclusionsVitamin D deficiency is prevalent among pregnant Chinese women. Residing in areas with low ambient UVB levels increases the risk of vitamin D deficiency, especially for women experiencing advanced stages of gestation, for younger pregnant women and for women of Hui ethnicity; therefore, vitamin D supplementation and sensible sun exposure should be encouraged, especially in the winter months. Further studies must determine optimal vitamin D intake and sun exposure levels for maintaining sufficient vitamin D levels in pregnant Chinese women.

Vitamin D Status and Its Determinants in Healthy Slovenian Pregnant Women

2015 ◽  
Vol 67 (2) ◽  
pp. 96-103 ◽  
Author(s):  
Aneta Soltirovska Salamon ◽  
Evgen Benedik ◽  
Borut Bratanič ◽  
Manca Velkavrh ◽  
Irena Rogelj ◽  
...  
Keyword(s):  
Vitamin D ◽  
Pregnant Women ◽  
Vitamin D Deficiency ◽  
Sun Exposure ◽  
Physical Activities ◽  
Dietary Intakes ◽  
Hydroxyvitamin D ◽  
Day Range ◽  
The Status ◽  
25 Hydroxyvitamin D

Background/Aims: Vitamin D deficiency is a common underdiagnosed condition. The aim of this was to analyze the status of vitamin D and its determinants in healthy Slovenian pregnant women. Methods: A total of 132 volunteer pregnant women completed a questionnaire including baseline demographics, food frequency, physical activities; anthropometrical measurements, body mass index and levels of 25-(OH)D in serum were performed during the third trimester, and dietary intakes were assessed during the 27-28th week of gestation. Results: Vitamin D deficiency was present in 14% while insufficiency was present in 41% of women. The risk for inadequacy was higher in women older than 30 years (p = 0.01), in those with less frequent outdoor physical activity (p = 0.01) and in pregnancies during the low sun exposure season (p = 0.04). Insufficiency was not significantly more frequent in less educated women, unemployed and in those living in urban area. The median value of vitamin D from habitual dietary intake was 1.5 µg/day (range 0.1-13.4) and did not influence 25-hydroxyvitamin D level (p = 0.91). Conclusions: The prevalence of vitamin D inadequacy was 55% and was dependent on age, season and outdoor physical activities. The results suggest a discrepancy between vitamin D intake through habitual diet and the reference needs.

scholarly journals Widespread 25-Hydroxyvitamin D Deficiency in Affluent and Nonaffluent Pregnant Indian Women

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Rati Jani ◽  
Suhaila Palekar ◽  
Tanya Munipally ◽  
Padmini Ghugre ◽  
Shobha Udipi
Keyword(s):  
Vitamin D ◽  
Sun Exposure ◽  
Cross Sectional Study ◽  
Exposure Index ◽  
Cross Sectional ◽  
Indian Women ◽  
Hydroxyvitamin D ◽  
Dietary Phosphorus ◽  
25 Hydroxyvitamin D ◽  
Relationship Of

Objectives. This cross-sectional study primarily aimed to assess vitamin D adequacy in the third trimester of pregnancy using 25-hydroxyvitamin D (25(OH)D) and explore lifestyle characteristics (sun exposure index, diet, and economic indicators) associated with serum 25(OH)D. The secondary aim was to examine the relationship of serum 25(OH)D with birth weight and gestational age.Methods. Serum 25(OH)D was measured by chemiluminescent immunoassay in 150 pregnant women from Mumbai. Sun exposure index was computed. Dietary calcium, phytate : calcium ratio, and dietary phosphorus was calculated using the 24-hour diet recall method.Results. All women had 25(OH)D levels < 30.00 ng/ml. Multivariable linear regression showed that nonaffluent women had poorer 25(OH)D status than their affluent counterparts (β=-0.20;P=0.03). Higher sun exposure index was associated with higher 25(OH)D concentrations (β=0.31;P<0.001), which remained significant after controlling for covariates. At the bivariate level, mothers of infants weighing <2500 g had lower serum 25(OH)D concentrations compared to mothers whose infants weighed≥2500 g (P=0.02). This association became non-significant after controlling for covariates.Conclusions. Vitamin D deficiency was universally prevalent in the cohort studied. There is a need to develop culturally sensitive strategies for improving the 25(OH)D status.

scholarly journals Determinants of changes in vitamin D status postpartum in Swedish women

2015 ◽  
Vol 115 (3) ◽  
pp. 422-430 ◽  
Author(s):  
Petra Brembeck ◽  
Anna Winkvist ◽  
Mari Bååth ◽  
Linnea Bärebring ◽  
Hanna Augustin
Keyword(s):  
Vitamin D ◽  
Sun Exposure ◽  
Activity Level ◽  
Vitamin D Status ◽  
Maternal Vitamin ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D ◽  
Food Diaries ◽  
Main Determinants ◽  
Vitamin D Supplements

AbstractLow vitamin D status has been associated with unfavourable health outcomes. Postpartum, it is speculated that maternal vitamin D status decreases due to transfer of vitamin D from mother to child through breast milk. A few studies have investigated changes in maternal vitamin D postpartum and possible determinants. Thus, the aims of the present study were to determine changes in serum concentrations of 25-hydroxyvitamin D (25(OH)D) between 2 weeks and 12 months postpartum in Swedish women and to evaluate lactation and other determinants for changes in 25(OH)D concentration postpartum. In total, seventy-eight women were studied at 2 weeks, 4 months and 12 months postpartum. Data collection included measurements of weight and height as well as information about lactation, sun exposure, use of oestrogen contraceptives and physical activity level. Blood samples were collected and serum 25(OH)D levels were analysed using liquid chromatography-tandem MS. Dietary intake of vitamin D was recorded using 4-d food diaries. For all the women studied, mean serum 25(OH)D did not change between 2 weeks and 12 months postpartum (67 (sd 23) v. 67 (sd 19) nmol/l). No association was found between lactation and changes in serum 25(OH)D concentration postpartum. Significant determinants for postpartum changes in 25(OH)D concentration were use of vitamin D supplements (P=0·003), use of oestrogen contraceptives (P=0·013) and season (P=0·005). In conclusion, no changes were observed in 25(OH)D concentrations during the 1st year postpartum in these women and no association was found between lactation and changes in 25(OH)D concentration postpartum. The main determinants for the variation in changes in 25(OH)D concentrations postpartum were use of vitamin D supplements, use of oestrogen contraceptives and season.

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