scholarly journals Vitamin D Supplementation during Winter: Effects on Stress Resilience in a Randomized Control Trial

Nutrients ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3258
Author(s):  
Anita L. Hansen ◽  
Gina Ambroziak ◽  
David Thornton ◽  
James C. Mundt ◽  
Rachel E. Kahn ◽  
...  
Keyword(s):  
Vitamin D ◽  
Stress Condition ◽  
Intervention Group ◽  
Control Group ◽  
Experimental Stress ◽  
Vitamin D Status ◽  
Post Intervention ◽  
Stress Resilience ◽  
Psychophysiological Responses ◽  
Vitamin D Levels

Vitamin D status may be important for stress resilience. This study investigated the effects of vitamin D supplements during winter on biological markers of stress resilience such as psychophysiological activity, serotonin, and cortisol in a placebo-controlled, randomized clinical trial. Eighty-six participants were randomly assigned to the Intervention (vitamin D) or Control (placebo) groups. Before and after the intervention participants were exposed to an experimental stress procedure. Psychophysiological activity was measured during three main conditions: baseline, stress, and recovery. Fasting blood samples were taken in the morning and saliva samples were collected at seven different time points across 24 h. Prior to intervention both groups had normal/sufficient vitamin D levels. Both groups showed a normal pattern of psychophysiological responses to the experimental stress procedure (i.e., increased psychophysiological responses from resting baseline to stress-condition, and decreased psychophysiological responses from stress-condition to recovery; all p < 0.009). Post-intervention, the Intervention group showed increased vitamin D levels (p < 0.001) and normal psychophysiological responses to the experimental stress procedure (p < 0.001). Importantly, the Control group demonstrated a classic nadir in vitamin D status post-intervention (spring) (p < 0.001) and did not show normal psychophysiological responses. Thus, physiologically the Control group showed a sustained stress response. No significant effects of vitamin D were found on serotonin and cortisol.

scholarly journals Vitamin D status and Physical Activity during Wintertime in Forensic Inpatients—A Randomized Clinical Trial

Nutrients ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 3510
Author(s):  
Anita L. Hansen ◽  
Gina Ambroziak ◽  
David M. Thornton ◽  
James C. Mundt ◽  
Rachel E. Kahn ◽  
...  
Keyword(s):  
Physical Activity ◽  
Vitamin D ◽  
Intervention Group ◽  
Optimal Level ◽  
Vitamin D Supplementation ◽  
Control Group ◽  
Vitamin D Status ◽  
Post Intervention ◽  
Post Test ◽  
25 Hydroxy Vitamin D

This study aimed to gain deeper knowledge about the relationship between vitamin D and physical activity in a sample of forensic inpatients. Sixty-seven male forensic inpatients participated. Participants were randomly assigned into an Intervention group (vitamin D) or a Control group (placebo). The Physical Activity–Rating (PA-R) questionnaire was used to measure physical activity from January to May. Vitamin D status was measured as 25-hydroxy vitamin D (25-OHD) pre- and post-intervention. The results revealed that vitamin D status at post-test was positively correlated with physical activity, but there was no effect of vitamin D supplementation looking at the two randomized groups. However, controlling for body mass index (BMI), the results showed an effect of BMI and a main effect of groups with a higher level of physical activity in the Intervention group. No interaction effects were found. Participants were also assigned into High and Low vitamin D groups based on the vitamin D status at post-test; i.e., the upper (75.1 nmol/L) and lower quartile (46.7 nmol/L). T-tests revealed that participants with a vitamin D status above 75 nmol/L showed significantly higher levels of physical activity than participants with a vitamin D status below 46.7 nmol/L. Thus, a vitamin D status above 75 nmol/L seems to be an optimal level.

189 THE EFFECT OF VITAMIN D SUPPLEMENTATION ON ANTI-MULLERIAN HORMONE LEVELS IN REPRODUCTIVE-AGE WOMEN

2015 ◽  
Vol 27 (1) ◽  
pp. 185 ◽  
Author(s):  
M. Taheri ◽  
M. Modarres ◽  
A. Abdollahi
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Intervention Group ◽  
Serum Levels ◽  
Vitamin D Supplementation ◽  
T Test ◽  
Reproductive Age ◽  
Control Group ◽  
Post Intervention ◽  
Reproductive Age Women

Vitamin D deficiency has been correlated with the infertility and lower clinical pregnancy following IVF. Anti-Mullerian hormone (AMH) plays a key role during follicle development; it has been recognised as a predictor of regular ovulation and probably IVF success. Considering the critical need for experimental human study to investigate the impact of vitamin D supplementation on ovulatory function, the aim of this study was to demonstrate the effectiveness of the vitamin D supplementation on AMH serum levels among reproductive-age women with vitamin D deficiency. 195 reproductive women (18–35 year-old) with confirmed vitamin D deficiency [serum 25(OH)D <75 nmol L–1] and without diagnosed polycystic ovary syndrome (PCOS) were enrolled to this controlled clinical trial. Participants were randomly assigned to a control group (n = 96) or an intervention group (n = 99). Women in the intervention group used 2000 IU day–1 vitamin D drops for 15 weeks. 19 participants were missed during the follow-up; finally the numbers of women in the intervention and control groups were 91 and 85, respectively. At the beginning of the study and after the intervention, 25-hydroxyvitamin D and AMH serum levels were quantified using enzyme immunoassay (EIA; Immunodiagnostic Systems, Boldon, UK) and ELISA (Beckman-Coulter Inc., Fullerton, CA, USA) methods respectively. The post-intervention AMH measurement was performed after 2–5 weeks in the same day-of-cycle on which basal AMH measurement was done. Paired t-test, independent t-test, and Pearson correlation were used as appropriate and a P-value of less than 0.05 was considered significant. Significantly low AMH levels were seen in the vitamin D deficient women of this study (14.46 ± 11.92 pmol L–1 in control group and 14.09 ± 11.52 pmol L–1 in intervention group). After the intake of vitamin D supplementation in intervention group, AMH levels were increased to 24.89 ± 12.47 pmol L–1, which were significantly different from the 15.43 ± 13.03 pmol L–1 in control group (P < 0.001). Correlation coefficients for AMH with pre-intervention and post-intervention vitamin D were r = 0.489 and r = 0.599 respectively (P < 0.001). Treatment of vitamin D deficiency increases AMH to the optimum levels. Vitamin D deficient women had low levels of AMH. These findings support other studies which found a correlation of poor IVF outcomes with low vitamin D levels. Vitamin D supplementation could be useful in the improvement of controlled ovarian hyper-stimulation/IVF outcomes in case of vitamin D deficiency.

scholarly journals Vitamin D status in full-term exclusively breastfed infants versus full-term breastfed infants receiving vitamin D supplementation in Thailand: a randomized controlled trial

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Chayatat Ruangkit ◽  
Sukrit Suwannachat ◽  
Pornchanok Wantanakorn ◽  
Napapailin Sethaphanich ◽  
Surapat Assawawiroonhakarn ◽  
...  
Keyword(s):  
Vitamin D ◽  
Growth Parameters ◽  
Intervention Group ◽  
Serum Vitamin ◽  
Vitamin D Supplementation ◽  
Full Term ◽  
Control Group ◽  
Vitamin D Status ◽  
Serum Vitamin D ◽  
Breastfed Infants

Abstract Background Many international medical organizations recommend vitamin D supplementation for infants, especially exclusively breastfed infants. In Thailand, however, data regarding the vitamin D status in Thai infants are lacking. Such data would help to support physician decisions and guide medical practice. Methods Full-term, exclusively breastfed infants were randomized into two groups at 2 months of age to continue exclusive breastfeeding either without vitamin D supplementation (control group, n = 44) or with vitamin D3 supplementation at 400 IU/day (intervention group, n = 43) until 6 months of age. At 6 months, the serum vitamin D (25OHD) of the infants and their mothers, serum bone marker, and infants’ growth parameters were compared between the two groups. Results The infants’ serum 25OHD concentration was lower in the control group than intervention group (20.57 ± 12.66 vs. 46.01 ± 16.42 ng/mL, p < 0.01). More infants had vitamin D sufficiency (25OHD of > 20 ng/mL) in the intervention group than control group (93.0% vs. 43.2%, p < 0.01). There were no significant differences in the maternal 25OHD concentrations between the control and intervention groups (25.08 ± 7.75 vs. 23.75 ± 7.64 ng/mL, p = 0.42). Serum calcium, phosphorus, intact parathyroid hormone, alkaline phosphatase, and infants’ growth parameters were comparable between the two groups. After adjustment for the confounding factors, 25OHD concentration in the intervention group was 25.66 ng/mL higher than the control group (95% confidence interval, 19.07–32.25; p < 0.001). Vitamin D supplement contributed to an 88.7% decrease in the prevalence of vitamin D insufficiency/deficiency (relative risk, 0.11; 95% confidence interval, 0.04–0.35; p < 0.01). Conclusions Most full-term, exclusively breastfed Thai infants have serum vitamin D concentration below sufficiency level at 6 months of age. However, vitamin D supplementation (400 IU/day) improves their vitamin D status and prevents vitamin D deficiency. Trial registration The study was pre-registered in the Thai Clinical Trials Registry (TCTR20190622001) on 22/06/2019.

scholarly journals Vitamin D Supplementation is Associated with Increased Glutathione Peroxidase-1 Levels in Arab Adults with Prediabetes

Antioxidants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 118 ◽  
Author(s):  
Mohammed Ghouse Ahmed Ansari ◽  
Shaun Sabico ◽  
Mario Clerici ◽  
Malak Nawaz Khan Khattak ◽  
Kaiser Wani ◽  
...  
Keyword(s):  
Vitamin D ◽  
Glutathione Peroxidase ◽  
Low Density Lipoprotein ◽  
Intervention Group ◽  
Density Lipoprotein ◽  
Vitamin D Supplementation ◽  
Control Group ◽  
Post Intervention ◽  
Glutathione Peroxidase 1 ◽  
Reactive Protein

Vitamin D supplementation may be used to lower oxidative stress. This interventional study aimed to investigate the effects of vitamin D supplementation on glutathione peroxidase 1 (GPx1) levels and other parameters in Arab adults with prediabetes. A total of 203 Saudi adults with prediabetes and vitamin D deficiency [intervention group, N = 146 (53 males and 93 females); control group, N = 57 (25 males and 32 females)] were included in this non-randomized, six-month intervention study. The intervention group received 50,000 international units (IU) cholecalciferol tablets once a week for two months, then twice a month for the next two months, followed by 1000 IU daily for the last two months. The control group received no supplementation. Serum 25(OH)D, lipid profile, glucose, C-reactive protein (CRP) and GPx1 were measured at baseline and after six months. Post-intervention, GPx1 concentrations increased significantly in the intervention group [17.3 (11.5–59.0) vs 26.7 (11.4–59.9) p < 0.01] while no changes were observed in the control group (p = 0.15). This significant increase in 25(OH)D and GPx1 levels persisted after adjusting for age and BMI. Stratification according to sex revealed that this favourable increase in GPx1 was true only for males (p = 0.002). In all groups, baseline GPx1 was inversely correlated with low density lipoprotein (LDL)-cholesterol (r = −0.26, p < 0.01) and body mass index (BMI) (r = −0.20, p < 0.05), while positively correlated with age (r = 0.18, p < 0.05) and systolic blood pressure (r = 0.19, p < 0.05). In conclusion, vitamin D supplementation favourably enhanced GPx1 levels in adult Arabs with prediabetes, particularly in males.

scholarly journals Vitamin D Status in Full-term Exclusively Breastfed Infants versus Full-term Breastfed Infants Receiving Vitamin D Supplementation in Thailand: A Randomized Controlled Trial

2021 ◽  
Author(s):  
Chayatat Ruangkit ◽  
Sukrit Suwannachat ◽  
Pornchanok Wantanakorn ◽  
Napapailin Sethaphanich ◽  
Surapat Assawawiroonhakarn ◽  
...  
Keyword(s):  
Vitamin D ◽  
Intervention Group ◽  
Serum Vitamin ◽  
Vitamin D Supplementation ◽  
Full Term ◽  
Control Group ◽  
Vitamin D Status ◽  
Serum Vitamin D ◽  
Breastfed Infants ◽  
25Ohd Concentration

Abstract Background: Many international medical organizations recommend vitamin D supplementation for infants, especially exclusively breastfed infants. In Thailand, however, data regarding the vitamin D status in Thai infants are lacking. Such data would help to support physician decisions and guide medical practice. Methods: Full-term, exclusively breastfed infants were randomized into two groups at 2 months of age to continue exclusive breastfeeding either without vitamin D supplementation (control group, n = 44) or with vitamin D3 supplementation at 400 IU/day (intervention group, n = 43) until 6 months of age. At 6 months, the serum vitamin D (25OHD) of the infants and their mothers, serum bone marker, and infants' growth parameters were compared between the two groups. Results: The infants' serum 25OHD concentration was lower in the control group than intervention group (20.57 ± 12.66 vs. 46.01 ± 16.42 ng/mL, p < 0.01). More infants had vitamin D sufficiency (25OHD of >20 ng/mL) in the intervention group than control group (93.0% vs. 43.2%, p < 0.01). Vitamin D supplementation in breastfed infants increased the mean serum 25OHD concentration by 25.66 ng/mL (95% confidence interval, 19.07–32.25; p < 0.001) and contributed to an 88.7% decrease in the prevalence of vitamin D insufficiency/deficiency (relative risk, 0.11; 95% confidence interval, 0.04–0.35; p < 0.01).Conclusions: Most full-term, exclusively breastfed Thai infants have serum vitamin D concentration below sufficiency level at 6 months of age. However, vitamin D supplementation (400 IU/day) improves their vitamin D status and prevents vitamin D deficiency.Trial registration: The study was pre-registered in the Thai Clinical Trials Registry (TCTR20190622001) on 22/06/2019.

scholarly journals Association of serum vitamin D levels with gestational diabetes mellitus

2021 ◽  
Vol 10 (6) ◽  
pp. 2198
Author(s):  
Sharmeen Mahmood ◽  
Hasna Hena Pervin ◽  
Shereen Yousuf
Keyword(s):  
Vitamin D ◽  
Pregnant Women ◽  
Serum Vitamin ◽  
Maternal Serum ◽  
Control Group ◽  
Case Group ◽  
Vitamin D Status ◽  
Third Trimester ◽  
Serum Vitamin D ◽  
Vitamin D Levels

Background: This study was done to evaluate the association of serum vitamin D level with GDM (n=30) and without GDM (n=30). The age and body mass index of the participants along with their gestational age, gravidity and parity were harmonized. The serum vitamin D levels and blood glucose were investigated. The results revealed that, normal pregnant women had significantly higher vitamin D level than their GDM counterparts.Methods: This case-control study was conducted on healthy pregnant women attending routine antenatal care at Bangabandhu Sheikh Mujib medical university from January 2019 to December 2019 recruited at third trimester of gestation. We measured maternal serum vitamin D status (25[OH]D) in third trimester of pregnancy. GDM was diagnosed according to the American diabetes association. guidelines. Vitamin D status was defined as, vitamin D sufficiency (≥30 or ≥75 nmol/L), insufficiency (20-30 and 50-75 nmol/L), were used to categories participants according to their 25[OH]D concentrations. We calculated adjusted odds ratios and 95% confidence intervals (CIs) using logistic regression.Results: The mean serum vitamin D level was lower in case group case 23.4 (17.4±35.1) compared to that in control group 29.7 (15.4±39.8) and the difference between the 2 groups was statistically significant (p≤0.001). Sufficient level of vitamin D was more in control group (66.7%) than that of case group (26.1%). Insufficient level of vitamin D was higher in case (73.3%) group than that of control (33.3%) group. These findings were significant (p=0.021). Respondents with insufficient level of vitamin D have 3.1 times more chance to develop GDM.Conclusions: Serum vitamin D level is reduced in pregnant women having GDM.

scholarly journals Vitamin D Levels in Children With Recurrent Aphthous Stomatitis

2019 ◽  
Vol 99 (7) ◽  
pp. 460-463 ◽  
Author(s):  
Burçin Nalbantoğlu ◽  
Ayşin Nalbantoğlu
Keyword(s):  
Vitamin D ◽  
Serum Vitamin ◽  
Recurrent Aphthous Stomatitis ◽  
Aphthous Stomatitis ◽  
Control Group ◽  
Healthy Controls ◽  
Vitamin D Status ◽  
Serum Vitamin D ◽  
Vitamin D Levels ◽  
Significant Difference

Background: Recurrent aphthous stomatitis is one of the most prevalent oral mucosa diseases and the etiology is unclear. As a potent anti-inflammatory and immunomodulating agent, vitamin D can significantly affect oral cavity homeostasis. However, to the best of our knowledge, no study has been conducted in pediatric population on the potential role of vitamin D in recurrent aphthous stomatitis to date. The aim of the present study is to determine the vitamin D status in recurrent aphthous stomatitis in children. Methods: This study is conducted retrospectively. Seventy-two patients with minor recurrent aphthous stomatitis and 70 age-matched healthy controls included in the study. 25-Hydroxyvitamin D levels were measured in all patients using enzyme immunoassay. Results: Serum vitamin D levels were 16.4 (8.6) ng/mL in patient group and 23.1 (11.5) ng/mL in healthy controls. There was a statistically significant difference between the groups in terms of serum vitamin D levels ( P = .002). There was no significant correlation between serum vitamin D levels and the severity of the recurrent aphthous stomatitis ( r = 0.54, P = .76). Conclusions: Our study showed a significant difference in vitamin D levels between patients with recurrent aphthous stomatitis and the healthy control group. We also found no correlation between vitamin D status and the severity of the disease.

scholarly journals Neonatal Vitamin D status and the risk of neonatal sepsis

2019 ◽  
Vol 35 (2) ◽  
Author(s):  
Abdurrahman Avar Ozdemir ◽  
Yakup Cag
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Neonatal Sepsis ◽  
Neonatal Intensive Care ◽  
Sepsis Group ◽  
Control Group ◽  
Vitamin D Status ◽  
Term Infants ◽  
Creative Commons ◽  
Vitamin D Levels

Objective: To evaluate the maternal and neonatal 25-hydroxyvitamin D [25(OH)D] levels and the effect of 25(OH)D levels on the development of neonatal sepsis. Methods: This prospective study was performed in the neonatal intensive care unit of Medicine Hospital/Biruni University between November 2017 and September 2018. Fifty one term infants with sepsis group and 56 term infants with control group were included in this study. Blood samples for whole blood count, CRP, Ca, P, ALP, 25(OH)D and culture were obtained from all neonates. Results: Mean vitamin D levels for the neonates and their mothers were found to be 12.4±8.5 ng/ml and 13±8.7 ng/ml, respectively. There was a significant correlation between maternal and newborn 25(OH)D levels (r=0.72, p<0.01). The number of the newborns with vitamin D deficiency was significantly higher in the sepsis group (n=31, 60.8%) than in the control group (n=30, 53.6%; p=0.00), corresponding to significantly lower levels of vitamin D in the sepsis group (11±5.5 ng/ml vs. 13.8±10.6 ng/ml; p=0.012). Similarly, maternal vitamin D levels was significantly lower in the sepsis group than in the control group (10.8±5.6 ng/ml vs. 14.9±10 ng/ml; p=0.001). Conclusion: Our findings suggest that there may be an association between vitamin D deficiency and neonatal sepsis. How to cite this:Ozdemir AA, Cag Y. Neonatal Vitamin D status and the risk of neonatal sepsis. Pak J Med Sci. 2019;35(2):---------. doi: https://doi.org/10.12669/pjms.35.2.342 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

scholarly journals The Relation of Vitamin D Blood Level with Statin-Associated Muscle Symptoms (SAMS)

2021 ◽  
pp. 39-48
Author(s):  
Thouria Ijdayaat ◽  
Khaled Eltoukhy ◽  
Maha Hazem ◽  
Kefaya Elsyed
Keyword(s):  
Vitamin D ◽  
Latex Agglutination ◽  
Precipitation Method ◽  
High Density Lipoproteins ◽  
Control Group ◽  
Vitamin D Status ◽  
Enzymatic Method ◽  
Reactive Protein ◽  
Vitamin D Levels ◽  
Symptom Group

Aims: This work evaluates the vitamin D status in patients with statins- associated muscle symptoms. Study Design:  A case control prospective study. Place and Duration of Study:  Neurology Department, Mansoura University, Mansoura, Egypt, between June 2020 and May 2021. Methodology: Total of 85 participants included in this study, 60 participants of them have chronic Stroke and ischemic heart disease, treated by different kinds of statins and 25 participants were healthy controlled individuals. The 60 patients were 35 males (55%) and 25 females (45%), with age ranging from 40 to 70 years. The 60 participants were divided into two groups: The first group included (30 patients) treated with statins and they did not have Statin-Associated Muscle Symptoms (SAMS).The second group included (30 patients) also treated with Statin and they complained of SAMS. The third group is the control group, which contains the 25 participants who were healthy people. The control group included15 males (55%) and 10 females (45%) with age ranged from 35 to 65 years. Laboratory investigations were conducted on all participants in this study. The participants were subjected to total of 5 laboratory tests, which include: (1) Vitamin D (Enzyme immunoassay method), (2) Total CK (Enzymatic method), (3) Total Cholesterol and Triglycerides (Enzymatic method), (4)High density lipoproteins Cholesterol (Precipitation method), (4)Low density lipoproteins Cholesterol (Freid Wald equation), and (5) C – reactive protein (CRP: Latex Agglutination Method) was done beside elecetrophysiology study ( Needle electromyography (NEMG) was include). Results: Out of 60 patients the statistical readings of Vitamin D levels for the studied groups, demonstrating a significant statistical difference in Vitamin D levels between patients complaining of statin-associated muscle symptoms group (P≤0.001), and the other groups with lowest mean of (26.30 ±3.75), while patient without statin-associated muscle symptom group had the mean rating of (29.33 ±3.69), and the control group had the highest mean of (30.14 ±3.57). Conclusion: There is a positive relationship between vitamin D deficiency and statin-associated muscle symptoms. Vitamin D status may play an important role in diagnosis and management of SAMS. Further studies are needed to evaluate the relationship between vitamin D and SAMS.

scholarly journals Sunlight Exposure and Vitamin D Levels in Older People-An Intervention Study in Swedish Nursing Homes

2020 ◽  
Vol 24 (10) ◽  
pp. 1047-1052
Author(s):  
Maria Samefors ◽  
A. Tengblad ◽  
C. J. Östgren
Keyword(s):  
Mental Health ◽  
Vitamin D ◽  
Nursing Homes ◽  
Older People ◽  
Intervention Group ◽  
Nursing Home Residents ◽  
Well Being ◽  
Control Group ◽  
Oral Vitamin ◽  
Vitamin D Levels

Abstract Objectives Older people are recommended to take oral vitamin D supplements, but the main source of vitamin D is sunlight. Our aim was to explore whether active encouragement to spend time outdoors could increase the levels of serum 25-hydroxyvitamin D (25(OH)D) and increase the mental well-being of nursing home residents. Design A cluster randomized intervention trial. Setting Nursing homes in southern Sweden. Participants In total 40 people >65 years. Intervention The intervention group was encouraged to go outside for 20–30 minutes between 11 a.m. and 3 p.m. every day for two months during the summer of 2018. Measurements We analyzed serum 25(OH)D before and after the summer. Data from SF-36 questionnaires measuring vitality and mental health were used for the analyses. Results In the intervention group, the baseline median (interquartile range (IQR)) of serum 25(OH)D was 42.5 (23.0) nmol/l and in the control group it was 52.0 (36.0) nmol/l. In the intervention group, the 25(OH)D levels increased significantly during the summer (p=0.011). In the control group, there was no significant change. The intervention group reported better self-perceived mental health after the summer compared to before the summer (p=0.015). In the control group, there was no difference in mental health. Conclusion Active encouragement to spend time outdoors during summertime improved the levels of serum 25(OH)D and self-perceived mental health significantly in older people in nursing homes and could complement or replace oral vitamin D supplementation in the summer.

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